Aurora – Yibo https://yibomarine.com China's Marine Flooring Manufacturer Wed, 23 Sep 2026 03:00:40 +0000 en-US hourly 1 https://wordpress.org/?v=7.1.3 https://yibomarine.com/wp-content/uploads/2026/09/cropped-亿博-站点标识-高清方形-1-32x32.png Aurora – Yibo https://yibomarine.com 32 32 Ordinary Deck Covering: 6 Marine Repair Checks https://yibomarine.com/blog/ordinary-deck-covering-guide/ https://yibomarine.com/blog/ordinary-deck-covering-guide/#respond Tue, 15 Sep 2026 02:15:26 +0000 https://yibomarine.com/?p=2359

Ordinary deck covering is a cementitious marine underlay in this guide; its repair begins with determining what has been installed and what changes have been made. A finish that’s cracked, a wet spot, or a hollow sound indicates what needs investigation, but it doesn’t reveal all damaged layers or what type of system should be used as a replacement.

Before requesting a repair price

Check the layer identity, observed condition, water history, assessment permissions, proposed work scope and governing system documents. Use the six-field handoff below to record the answers and the unresolved questions.

This memo addresses planning for the repair of cementitious marine underlays in commercial vessels. This memo doesn’t give the right to open or remove a floor, specify a removal method or approve the return to service of a vessel.

Marine primary deck covering: identify the damaged layer

Marine primary deck covering: identify the damaged layer — Yibo Marine

Before a marine flooring repair even considers a material recommendation, a description of the layer is needed. From what’s on record, determine the finish, its adhesive or bond coat, the underlay, and the supporting deck. Where uncertainty in the interface exists, don’t provide a speculative cause, but mark the interface as unknown.

“This document is applicable to deck coverings (underlay, cement type).”

The same ISO abstract excludes overlay floor coverings such as ceramic tiles, carpeting, and rubber sheeting. The US Coast Guard’s guidance attributes its primary deck covering definition to the IMO FTP Code: the first layer of floor construction includes the primary coat, anti-corrosive compound or adhesive needed at the deck plating.

Layer and system identity record: include only what is actually present
Record item What to identify What the record does not prove
Visible finish Carpet, vinyl, tile, resin or another documented finish Condition of the underlay beneath it
Adhesive Product, application record and adjoining materials Compatibility with a proposed substitute
Cementitious underlay Mortar or screed designation and recorded thickness Bond condition across the whole area
Primary coat Primer or bond-coat identity Remaining adhesion after water exposure
Corrosion protection Existing coating specification on the steel Absence of concealed corrosion
Waterproof layer Membrane location, if shown in the build-up Continuity around drains and penetrations
Acoustic arrangement Cork, damping layers or floating floors, if specified Retention of the original noise performance
Thermal insulation Insulating layer and its approved arrangement Suitability of a direct-bond repair
Supporting deck Plate material, location and inspection records Structural acceptance from a flooring photograph

A commercial name isn’t a complete construction drawing. Compare the installed product with the ordinary deck covering product information; use the separate primary deck covering installation guide when planning a new installation.

Identify the space as well as the ship

For passenger vessels such as ferries and cruise ships, record whether the job concerns a cabin, corridor or another interior space. An offshore vessel, yacht or naval project also needs its own location and governing documents; this guide doesn’t extend an interior underlay repair scope to exposed teak decking or synthetic teak.

Planning example: a cabin finish lifts

A ferry cabin has a lifted edge in its decorative vinyl. The invoice identifies the finish but says nothing about the underlying mortar; the record therefore describes the visible lifting and leaves underlay identity and condition unresolved.

Floor delamination: record symptoms before choosing a cause

Floor delamination: record symptoms before choosing a cause — Yibo Marine

It’s important to separate what has been observed in the field from what a qualified assessment has determined when reporting floor delamination. Take a photograph of the observed condition and indicate the location and date of the report. Leave suspected causes of delamination in a separate field until the service history and the interfaces involved have been determined.

Do

  • Describe cracks, lifting, staining or loose edges.
  • Locate each observation against a fixed reference.
  • Record who observed it and when.
Don’t

  • Label every crack as an adhesive failure.
  • Treat an intact finish as evidence of sound steel.
  • Assume a previous patch resolved the underlying problem.

Photos are more useful with both location and detail. Keep the original images. Identify and describe any shown scale. Document a measured dimension in mm as opposed to a guess. Measured dimensions document observations, not limits of acceptance for a repair.

  • Record a visible change in floor level against a fixed reference.
  • Describe the specific deck location instead of labeling several compartments as one damaged area.
  • Keep synthetic finishes and their bond lines distinct from the cement mortar underneath.

What does a hollow sound prove?

A change in reported sound should be noted with the location and the situation that led to the observation. This observation shouldn’t be interpreted as a failure of a particular bond line, or as an authorization for cutting, drilling, or removing the surface.

A useful scope distinction

NAVSEA Standard Item 009-026, FY-28 Change 1, clause 3.8, calls for inspection of exposed base coat or underlayment for certain resurfacing or partial-replacement work. That requirement belongs to its invoking Navy work item; it isn’t a universal diagnostic test.

When a contractor calls damage “minor,” ask which examined layer and agreed work scope that assessment covers. Using the word “minor” achieves no resolution for the concealed interfaces.

Floor water damage: capture the incident history

Floor water damage: capture the incident history — Yibo Marine

A floor water-damage report should connect the affected area to the known water event and installed floor layers. Indicate when the problem was first noticed, the suspected water entry point, observations of the water drainage path, and the record of previous repairs. Indicate confirmed facts and leave concealed moisture and corrosion as unanswered.

  • Location: identify the specific deck, compartment and nearby drain, threshold or penetration.
  • Timing: record discovery, reported recurrence and any known shutdown or cleaning event.
  • Water source: distinguish a confirmed leak from a suspected route or an unknown origin.
  • Previous work: preserve patch, resealing and replacement records, including products where known.

Photographs of a dry surface can’t provide evidence of the condition of an unexposed interface. Don’t allow a product’s setting time or another product’s drying period to determine the release condition of a repaired floor.

What reported repair cases can tell you

SynDeck’s published case studies describe water-related delamination in a Royal Fleet Auxiliary galley with cement screed, standing-water damage in resin underlayment on a US Navy support ship, and steel corrosion beneath rubber tiles on a Daring-class destroyer. These supplier accounts show why a repair inquiry should identify both the water history and the installed layers; they don’t establish failure rates or prove that changing from cement to resin will resolve the cause.

Planning example: recurring water at a galley doorway

An accommodation crew reports water at the same threshold after washing, followed by lifting near the adjoining finish. The handoff records the washing event, visible route and earlier resealing; it doesn’t decide whether the membrane, underlay or steel needs replacement before assessment.

US Coast Guard SFLC Standard Specification 6341 (2022) ties installation conditions and handling within its specific Coast Guard work to manufacturer instructions. Its procedures and material choices shouldn’t be used to address an unrelated passenger vessel repair.

Ask if the quote includes investigating the water route and restoring the visible floor. A finish only scope leaves that query unanswered.

Floor crack repair: define the assessment boundary

Floor crack repair: define the assessment boundary — Yibo Marine

Designation of the agreed extent of the assessment for the repair of the floor crack should include the location, the layers to be investigated, permitted access, and the person with responsibility for the next decision. Establish the status of material and the restrictions which apply to work on the floor, before any one person disturbs the floor. A condition checklist shouldn’t be used as a substitute for the vessel’s work authorization or hazard assessment.

Check legacy materials before disturbance

For covered US shipyard work, 29 CFR 1915.1001(g)(8)(i)(I) presumes resilient flooring or deck material, including associated mastic and backing, in buildings or vessels constructed no later than 1980 contains asbestos unless an industrial hygienist determines otherwise using recognized analytical techniques. This is a specific US rule, not a universal age test; newer construction doesn’t establish that a material is asbestos-free.

Provide the qualified assessor with the available records (if any) pertaining to hazardous materials and advise them of the records which are missing. Don’t advise the crew to grind, sample, or remove a layer if it’s unknown.

Separate the assessment question from the work authorization
Question Evidence to request Decision still required
What is the existing material? System records and the applicable hazardous-material assessment Who may investigate an unresolved layer?
Which work method is proposed? Method description and task-specific hazard assessment Which controls and permissions apply?
What happens if the scope changes? Named decision owner and variation procedure Who authorizes additional disturbance?
  • Name the party authorized to assess the existing covering and any exposed steel.
  • Define which areas may be accessed, and who may authorize further opening.
  • Record work-method restrictions, occupancy and required protection of adjoining spaces.
  • Assign responsibility for documenting unexpected conditions and approving a changed scope.

OSHA’s ship-repair surface-preparation guidance differentiates removing a given substance by mechanical, chemical, or solvent means, and in each of these, deems a personal protective equipment hazard assessment to be necessary. Selection of a product doesn’t suffice to resolve these concerns.

Planning example: a corridor must remain occupied

A passenger corridor has a crack near an earlier patch, but the crew needs an access route through the area. The inspection brief identifies the affected location, uncertain patch material and access constraint; the responsible team decides how the assessment can proceed before the repair contractor prices removal.

The supplier’s material quotation and the inspector’s access plan answer different questions. Keep the work authorization pending where the hazard assessment is incomplete, because a price for replacement mortar doesn’t resolve the risk from disturbing an unidentified layer.

Floor repair options: surface work, local repair or renewal?

Floor repair options: surface work, local repair or renewal? — Yibo Marine

Surface work, local underlay repair and wider renewal describe different extents of work and shouldn’t be treated as a ranking of hazardous methods. Consider the layers, available evidence and unresolved conditions within the extent of work to be undertaken with the appointed repair team. Only then should a route be considered against the applicable system requirements and the assessed condition of the area.

Questions to compare before selecting a repair scope
Comparison point Surface work Local underlay repair Wider renewal
Proposed work Defined exposed finish work Defined area and underlay depth Defined system and wider boundary
Condition evidence Basis for retaining lower layers Assessment of local and adjoining layers Basis for the extent of removal
Water history Explain whether water-related issues are resolved Identify the relevant route and interfaces Address the cause within the agreed scope
Steel work State whether excluded Define assessment and possible variations Separate steel acceptance from floor reinstatement
Replacement materials Identify finish and adhesive Identify underlay and junction materials Identify the complete proposed build-up
Boundary junctions Describe finish transitions Describe old-to-new interfaces Describe edges, drains and penetrations
Approval evidence Check the retained and changed arrangement Check the repaired combination Check the proposed whole system
Access and work controls Agree protection and occupancy limits Agree disturbance and removal controls Agree the broader work area and interfaces
Release and exclusions Define finish acceptance and exclusions Define repair acceptance and unresolved risks Define system acceptance and responsibilities

NAVSEA’s cited Standard Item distinguishes complete-system removal from assessment for partial replacement. It offers a good example of why the instruction to ‘repair the floor’ needs a scope, whilst the requirements of a commercial marine deck covering remain those which apply to that vessel and that project.

Can ordinary deck covering be repaired locally?

Local repair may be an option if assessment defines a repair boundary and includes a suitable replacement. This guide provides no universal patch area percentage, bond value or remaining life prediction. An unknown interface is a reason to resolve the scope, not to insert an assumed acceptance value.

Ask about the retained material

A quotation for a durable replacement material should also explain the basis for retaining the adjoining covering. The new product’s advertised property doesn’t establish the condition of the old system.

Flooring adhesive and deck underlayment: check the whole repair system

Flooring adhesive and deck underlayment: check the whole repair system — Yibo Marine

A repair system check should assess the proposed adhesive, underlayment, finish, and their interfaces with adjacent materials that are retained. Match the documents to the actual ship, space and build-up, and identify who confirms the technical suitability and approval applicability; an IMO label or isolated product certificate doesn’t respond to every system concern.

  • Identity: match product names, variants and the intended interior or exterior application.
  • Arrangement: compare primer, cement or polymer underlay, membrane, adhesive and finish with the documented build-up.
  • Conditions: obtain applicable preparation, thickness, application and release requirements.
  • Approval: check the relevant test evidence, installation details and certificate scope with the responsible parties.

As stated in USCG guidance for SOLAS floor finishes, adhesives are part of the fire test, with the manufacturer and application rate stated on the type approval certificate. An alteration to a vinyl, PVC or resin finish arrangement necessitates a scope check; the adhesive’s apparent compatibility shouldn’t be taken to certify the changed assembly.

Which primary deck covering documents need checking?

Where the specification cites the International Maritime Organization’s FTP Code, research the test reference and the arrangement detailed in the supporting documents. Keep a product’s certification and acceptance of the installed repair separate. Encourage the involved parties to resolve the difference between the documented and intended build-up.

“Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.”

That quote is a product-specific manufacturer instruction, and can’t replace the project specification. A one-component primer, lightweight composite underlay, or an epoxy system has a specific substrate and a specific application limit.

The newest document may not govern the work

For deck covering materials qualified to military performance specifications (MIL-PRF) under work invoking NAVSEA 009-026 FY-28 Change 1, clause 3.2.2 gives NAVSEA-reviewed F718 sheets priority over other manufacturer F718 sheets even if those are newer, subject to the Standard Item’s stated precedence. Record the governing version and decision owner instead of selecting a download by date alone.

The same care is required for systems developed for thermal or acoustic performance. Review marine acoustic floor systems and direct-bond underlay systems as separate entities. Distinguish marine epoxy floor finishes from the layers beneath them.

Repair quotations: use the 6-Field Deck Repair Handoff

Repair quotations: use the 6-Field Deck Repair Handoff — Yibo Marine

The 6-Field Deck Repair Handoff formats the info needed for a repair discussion as follows: location, system identity, observed condition, exposure history, inspection evidence, and service constraints. Send each supplier or contractor the same record, and keep unknowns visible to allow each to state the work to be done and the work to be excluded.

Copy these six fields into the repair inquiry
Field Information to supply Why it matters Record check
Location Vessel, deck, compartment and marked area Defines the place being discussed Match the plan and photographs
System identity Known layers, products and hazardous-material records Exposes missing material information Attach records; mark unavailable items
Observed condition Dated descriptions, images and measured dimensions Separates evidence from suspected causes Identify observer and measurement basis
Exposure history Known water events, cleaning and prior repairs Gives the assessment its service context Distinguish confirmed events from estimates
Inspection evidence Authorized findings, limitations and open questions Shows what has actually been assessed Name the responsible assessor
Service constraints Access, occupancy, permitted methods and decision owners Defines practical and safety boundaries Confirm with the responsible project personnel

This is an editorial checklist, not a validated diagnostic tool or a complete work authorization. Add repair-specific requirements, particularly when the repair impacts an approved arrangement or requires controlled disturbance of existing materials.

Record the operating constraint

State whether the work is planned in dock or while the vessel remains in service, and identify any proposed access near navigation spaces. Keep the schedule’s available work window separate from the product’s setting and release conditions; the repair team must establish whether those constraints can be met.

  • Ask whether removal, steel work and finish reinstatement are separate priced items.
  • Require the basis for any allowance covering concealed conditions.
  • Identify who can approve variations after an area is opened under the agreed controls.
  • Separate access availability from product application, curing and final acceptance conditions.

An area rate can be used once the included work is fixed. Comparing two rates without their layer boundaries, exclusions, and inspection assumptions can conceal different scopes; a small rate reduction doesn’t indicate a reduction in the total repair cost.

  • Ask each bidder to reduce ambiguity by marking retained and replaced layers on the same scope record.
  • Ask what evidence supports any promised improvement in acoustic performance or stability of the repaired surface.
  • Keep sustainability claims tied to a stated comparison and project evidence.

When contacting Yibo Marine, use the ordinary deck covering project inputs in conjunction with the condition record. The product discussion and site assessment remain separate tasks.

Marine deck covering maintenance: what is changing?

Marine deck covering maintenance: what is changing? — Yibo Marine

Marine deck covering needs a record of the changes to the actual vessel: materials, repair bounds, versions of documentation and service conditions. Update that record after the work is accepted, so the next assessment starts with the installed arrangement rather than an old product name or an unsubstantiated assumption.

  • Keep the accepted repair scope and marked-up location plan.
  • Retain product and approval documents with their recorded versions.
  • Record unresolved observations and the person responsible for follow-up.

The ISO catalogue identifies ISO 5694:2023 as a cement-type underlay standard, while the cited NAVSEA item carries a 31 March 2026 issue date for its particular work framework. Neither of these dates definitively applies to the next repair, and broad flooring forecasts do not predict the condition of this covering.

Planning example: the product name stays, the finish changes

A vessel’s repair file retains the original underlay name but the accepted work includes a replacement finish and adhesive. Attach the revised build-up and its acceptance evidence to the location record, because a later contractor can’t reconstruct that change from the underlay name alone.

Ask the supplier to identify the revised product documents and keep the inspector’s acceptance record with the same compartment plan. If the finish or adhesive differs from the arrangement described in the approval certificate, record that mismatch for the responsible approval party; an unchanged underlay name doesn’t establish that the revised system is covered.

Frequently asked questions

Can ordinary deck covering be repaired locally?

Local repairs may be an option, but visible defect size isn’t the sole criterion for that selection. Determine the installed layers, document the observed condition, and obtain the assessment to provide the repair boundary; give the contractor the marked plan used by the assessor to locate that boundary. Request the responsible group to identify and document compatible replacement materials, approval restraints and acceptance criteria. Unresolved material hazards or concealed conditions must continue to be explicit in the defined scope.

How do you integrate with our existing flooring supplier?

Provide the same layer records, photos and assessment findings to the current supplier and the proposed repair contractor. Request that they identify responsibility for providing compatibility advice, specifying preparation requirements, reinstating the finish and documenting acceptance. Record disagreements prior to accepting the scope. This method of coordination doesn’t mean one supplier can approve another manufacturer’s product or that Yibo provides all of the site services.

Do you cover design floors as well, or only subfloors?

Request that the quotation state the scope explicitly, since the decorative floor and the underlying deck covering may be separate work packages. Determine what layers are included in removal, repair and reinstatement, and what interfaces other parties are required to accept. Request exclusions for finishes, adhesives and steel work where applicable. A statement of work that only says floor repair leaves these responsibilities unresolved.

Is an IMO label enough to approve a repaired floor?

No. Verify the proposed materials, arrangement and vessel space against the supporting documents with the responsible approval parties, checking the primer, underlay, adhesive and finish together and asking them to resolve differences between the proposed repair and the arrangement described in the approval documents.

What does a hollow sound prove?

A hollow sound documents an observation with a location and an assessment question, not a complete diagnosis or permission to disturb the covering; record the circumstances and ask the responsible assessor which layers and interfaces require investigation under the agreed work controls.

How much does marine deck covering repair cost?

An estimate without defined limits lacks the scope needed for a useful repair quotation. This definition should include removal depth, replacement layers, access, inspection, and finish reinstatement. After a defined scope is decided, area rates may be appropriate. However, this guide isn’t offering a universal price, as it lacks a comparable dataset on project costs; compare included layers, retained material, allowances for unexpected conditions and variation responsibilities against the marked area before treating quoted totals as prices for equivalent work.

Key takeaway

An ordinary deck covering repair inquiry should make the known condition, unknown interfaces and responsible decisions visible. Define the scope before comparing prices, and confirm material, safety and approval requirements before disturbing or replacing the installed system.

Yibo Marine’s ordinary deck covering is part of its marine flooring range. Send available build-up details and condition information to discuss the documented repair scope; provide a description of any missing records so that the next series of questions can be addressed.

Related reading

References & Sources

Sources were reviewed in September 2026. Contract specifications and US regulations below retain their stated scope; they don’t establish approval of a Yibo product or a particular repair.

  1. ISO 5694:2023, Ships and marine technology, Deck covering, public scope and catalogue information.
  2. US Coast Guard, Finish & Furnishing Materials, primary deck covering and SOLAS floor-finish guidance.
  3. NAVSEA Standard Item 009-026, FY-28 Change 1, dated 31 March 2026, document priority and inspection scope.
  4. US Coast Guard SFLC Standard Specification 6341 (2022), installation of interior deck covering systems.
  5. 29 CFR 1915.1001, Asbestos, scope and paragraph (g)(8)(i)(I).
  6. OSHA Shipyard Employment eTool, Surface Preparation, work-method hazard assessment.
  7. Sika Marine Primer C, Usage, attributed product-specific compatibility instruction.

Supplier case context: SynDeck, Case Studies. The reported observations are attributed to the supplier and aren’t independent failure statistics.

]]> https://yibomarine.com/blog/ordinary-deck-covering-guide/feed/ 0 Non-Self-Levelling Screed Underlay for Marine Decks https://yibomarine.com/blog/non-self-levelling-screed-underlay-guide/ https://yibomarine.com/blog/non-self-levelling-screed-underlay-guide/#respond Tue, 15 Sep 2026 02:13:49 +0000 https://yibomarine.com/?p=2347
MARINE DECK BUILD-UP GUIDE
By Aurora

Non-Self-Levelling Screed Underlay refers to a layer in a construction process in which placement controls the required shape to achieve the specified geometry, rather than assuming that the material would self-level to assume the required shape. When completing a marine construction order, answer four questions: what shape is required, which layers meet, what was the recorded condition, and who can release the next stage?


Use this guide to prepare a review. For YB-1/YB-4 catalogue information, comparison data and quotation inputs, visit the existing non-self-levelling screed underlay product page. For the wider product family, start with marine deck covering systems.

Start With the Layer’s Job, Not Its Product Name

Start With the Layer’s Job, Not Its Product Name — YIBO

A non-self-leveling screed underlay may be a working description of a layer which is positioned to a controlled deck geometry; however, the phrase as used doesn’t define a legal material class, a thickness, or a release condition. First identify the substrate, the final floor, the intended surface outcome, and the documents that control the installed system.

ISO 5694:2023 concerns cement-type ship deck-covering underlay; its public abstract excludes overlays such as tile, carpet and rubber sheet. The distinction separates the preparation layer from the finish specification, but the abstract cannot establish compliance for a particular build-up.

  • Layer role: what the underlayment is intended to do in the stated deck system.
  • Geometry role: whether the drawing calls for flatness, a level datum, a fall, or a local transition.
  • Finish role: which tile, carpet, coating, wood, or other final floor supplier must accept the prepared surface.
  • Approval role: which vessel, flag, room and project requirements control the final decision.

That separation avoids a common paperwork failure: a product sheet may describe a cementitious compound, while the drawing, primer, adhesive, coating and finish still belong to different parties. The related primary deck covering guide can help frame the system vocabulary, but it doesn’t substitute for the project specifications.

Write a material brief before comparing bags.

Use one line for the actual deck substrate, one for the intended finish and one for the area shown on the drawing. Add the exact grade under consideration and the document revision received from its supplier, so procurement can ask about a defined construction instead of requesting a product on the strength of a search term.

  • Owner or yard: identify the vessel and room.
  • Applicator: identify the proposed layer and placement documents.
  • Finish supplier: identify the receiving-surface requirement.

Flat, Level, and Laid to Falls Are Different Requests

Flat, Level, and Laid to Falls Are Different Requests — YIBO

A surface may be smooth enough to receive a finish and may still not be level; it may even be intentionally sloped and thus not be suitable for a “make it level” instruction. Before placement, use a drawing-based instruction to specify the intended geometry and name the datum, drains, thresholds, doorways, seams, and local transitions.

Three questions for the work instruction

  1. Which points establish the reference height?
  2. Where must water be allowed to move and where must it not move?
  3. Which adjacent finish, sill, drain or coating determines the transition height?

DLA’s public MIL-PRF-3135 catalogue scope describes the internal naval-deck geometry by incorporating smooth, level and/or properly sloped conditions underneath a finishing layer. This describes a limited naval scope, but it’s helpful to plan: “smooth” shouldn’t be converted to “level” silently.

Record the geometry conversation, not a generic method.

When a project indicates the use of a Laser, straightedge, or gauge, record the instrument and location along with the result, pertinent date, operator and applicable reference datum. The request to obtain greater local flatness isn’t an instruction to completely flatten the floor, and a thicker build-up within a more constrained region must comply with the drawing and the documented limits of the material.

How to level a floor without self-leveling compound?

The more appropriate marine-deck query may be whether the stated objective is level. If the drawing indicates a fall or local fairing transition, a self-leveling compound shouldn’t be substituted for that decision; enter the datum and direct the material question to the specified system documents.

Hypothetical scenario: threshold conflict.

A planning drawing marks a cabin threshold at one height, while an early survey note calls the deck “level” and a nearby drain implies a fall. The controlled drawing revision is absent, and the finish supplier hasn’t confirmed how its final floor will meet the threshold; these are assumed planning inputs, not an actual vessel record.

The decision tension is documentary: a placement team can’t tell whether to protect a datum, create a transition or preserve a fall. Reconcile the drawing, drain and finish-interface records before selecting a screed route; no generic tolerance, laser reading or straightedge result resolves the missing decision.

Build the Control-Point and Interface Record Before Placement

Build the Control-Point and Interface Record Before Placement — YIBO

A controlled surface begins with a record showing interfaces: substrate condition, prior coating, primer, adhesive, isolation layer, underlayment and finish. It should provide each trade a visible route to question whether the subfloor or deck is described as structurally sound, which revision controls the interface, and who can stop the subsequent action when evidence is lacking.

“Testing of prepared surfaces for nonvisible contaminants such as soluble salts, and analysis of results”

AMPP SC 05 Surface Preparation, committee overview only

The AMPP committee overview is a prompt to assess whether the stated coating system requires preparation checks. It’s neither a test method, a tolerance, nor a prerequisite that every deck underlay receives the same preparation.

A useful interface question names both sides.

“Is this primer suitable?” leaves the receiver guessing about the material beneath it and the layer that follows. The clearer enquiry identifies the existing deck coating, proposed primer, underlay grade and final finish, then asks which current instructions cover those interfaces and which party will resolve any conflict.

  • Attach the layer sequence with the uncertain interface marked.
  • Keep a supplier’s response with the document revision it addresses.
  • Record an unresolved question as pending; don’t translate silence into agreement.
Record item Who supplies it? Question left open
Deck substrate and condition Shipyard or owner’s survey record Does the selected system name a preparation route?
Primer, coating or barrier Specified product supplier Which revision applies at the interface?
Underlayment material Manufacturer and applicator Which handling and cure conditions are documented?
Final floor or tile finish Finish supplier What surface and release evidence is required?

This card is intended to be a low-friction review aid rather than a quote form. Teams comparing placement behavior can use the related self-levelling deck covering guide once the project scope is defined.

Check a Manually Worked Surface in Stages

Check a Manually Worked Surface in Stages — YIBO

A visually smooth surface isn’t, in itself, proof that the final floor can be installed or that the deck construction is accepted. Review the agreed geometry, interface documents, visible surface condition and finish-release record as separate steps and record what’s absent, as opposed to assuming a pass.

  1. Geometry: compare control points with the approved drawing and stated fall/level goal.
  2. Interface: confirm coating, primer, adhesive and finish documents outline the same layer sequence.
  3. Surface: photograph high spots, low spots, ridges, seams, cracks or other observed conditions with location context.
  4. Release: identify the person and the document that can decide on the next stage of installation.

For U.S. SOLAS vessels, eCFR 46 CFR 164.106 describes a product-specific primary-deck-covering approval pathway that includes designated testing and batch or lot identity. It can’t be used to say that Yibo, another product, or a different vessel type is approved; it only reinforces the need to keep product identity and applicable scope visible.

Hypothetical scenario: smooth surface, missing records.

A crew reports that a manually worked area looks smooth after placement, but the finish supplier hasn’t issued its required substrate record and the primer revision is unclear. The applicator’s installation record identifies the area, while the final floor document is still missing; this is an assumed example, not a Yibo or shipyard case. The survey sheet names a gauge but doesn’t identify its reference datum.

The decision tension is that visual condition and record completeness point in different directions. Hold the handover question open, identify the release owner and request the current finish and interface documents rather than treating smoothness, apparent dryness or a gauge reading as a release test.

What are the differences between self-leveling screed and regular screed?

At a high level, the distinction of intended placement behavior and prescribed geometry is more relevant than a universal performance comparison. Self leveling concrete underlayment or self levelling compound, for instance, may be specified for a single surface that’s prepared, whereas where a drawing requires a different geometry, a manually controlled mortar or screed may be used. The named product and the installed system will determine the application.

Moisture and Finish-Interface Records Need Six Fields

Moisture and Finish-Interface Records Need Six Fields — YIBO

The system(s) requiring a specified moisture or floor-finish check must have traceable records kept for those checks. In order to understand the reading, be sure to note method, instrument, location, conditions, result and acceptance criteria. An observation of the surface as being dry or an unexplained result on a gauge isn’t sufficient to apply the finish.

ASTM F710-26’s public abstract is specifically about concrete floors receiving resilient flooring and says it does not supersede manufacturer instructions. It is therefore a boundary source here: it shows why a named system’s written requirements matter, while its concrete, pH and moisture provisions must not be presented as rules for steel-backed marine underlay.

Copyable Finish Handover Record Starter: method; instrument or record reference; sampling location; ambient and surface conditions; result; material/finish document revision and decision owner.

Use the record to identify a decision boundary.

When considering a renovation with a wooden deck, underfloor heating zone or another flooring project, the best question to ask isn’t if a familiar domestic term applies. In this case, record the named subfloor, finish, document revision, and any minimum thickness or height stated. Once recorded, ask the supplier what those documents mean for this build-up. Don’t create a new requirement based on a general comparison.

Specifications for elements labeled final-floor, carpet, tile, wood, or coating may use other language and supporting evidence. Don’t use a domestic-floor test convention in place of a vessel build-up or use an access milestone for the right to apply the final finish.

Keep structural and finish decisions separate.

ASTM F710-26, scope 1.3, excludes determining the structural adequacy of the concrete floor. That limitation matters when someone treats a preparation checklist as proof of structural fitness: the underlying construction and the finish interface are different questions, with their own responsible parties.

A durable floor is a project objective, not a conclusion that follows from a clean-looking surface or a completed form. Ask the finish supplier to identify the applicable criterion and the evidence it needs, then keep that answer with the reading instead of copying a pass value from an unrelated material.

Control Hazards First, Then Preserve Defect Evidence

Control Hazards First, Then Preserve Defect Evidence — YIBO

When a crack, powdering, ridge, low area or suspected separation is discovered, first ensure staff safety and control access to the site as required by the existing safety arrangements. Then, take pictures of the area and record the location, layer history and document references before proposing a repair.

OSHA 1915.81 addresses housekeeping, walkways and working surfaces in U.S. shipyard employment, including debris and wet-process conditions. Its safety requirements don’t diagnose a screed defect, select a repair method or define final-finish acceptance.

Observed condition Evidence to preserve Next decision
Visible crack Photo, location and extent Compare records with the named system
Hairline pattern Close and contextual photos Escalate to the decision owner
Powdering Surface observation and layer history Hold finish question open
High spot or ridge Control-point reference Confirm the geometry objective
Low spot or ponding Datum and drainage context Check fall versus level requirement
Weld transition Detail photo and interface record Coordinate adjoining layers
Suspected hollow area Location and work history Request project-specific assessment
Missing moisture record Missing method or document Obtain evidence before release
Unclear primer sequence Product names and revisions Reconcile supplier documents

FHWA’s archived 2016 bridge-deck protocol is an analogy for recording locations, dimensions, pictures, and supporting data. This analogy isn’t to be used as a marine defect method. Don’t apply the concrete diagnosis, chain-drag technique, repair methodology, or measurements to the thin marine screed layer.

Hypothetical scenario: crack before finish.

A crack is observed near a doorway shortly before the selected finish is due to arrive, and the crew can’t immediately find the layer-sequence record. The photo is available but the drawing revision, batch reference and finish-release document aren’t; this is a hypothetical planning example, not a customer case. The opening programme calls for a decision, while the controlled information package remains incomplete.

The decision tension is between pressure to continue installation and incomplete evidence about the condition and interface. Document the location, preserve the available records and route the review to the accountable parties; don’t label the cause or prescribe grinding, sealing, patching or another repair from the photograph alone.

Route Terminology and Approval Questions to the Right Place

Route Terminology and Approval Questions to the Right Place — YIBO

Actions, behaviors, or chemistries are described by pour, trowel, self-levelling, liquid, anhydrite, mortar, and compound. They don’t determine approval status or system compatibility on their own. Leave the material-route question open until the project identifies the named product, substrate, geometry, final floor, vessel scope and the current controlling document for the decision.

The self-levelling screed underlay page is an appropriate internal comparison destination when the specified placement behaviour differs. It isn’t evidence that an alternative system is suitable for the current deck.

Use current product instructions and the applicable project approval route. eCFR 46 CFR 164.106 is limited to its U.S. SOLAS primary-deck-covering pathway; it, a naval DLA catalogue scope and a commercial page can’t be collapsed into one universal claim.

Term Use it to ask Do not infer
Pour What placement action is specified? That a layer self-levels
Self-levelling What flow behavior does the product document? That it fits every deck geometry
Non-self-levelling What controlled geometry is required? That it is a universal regulatory class
Cementitious What named material system is selected? That every cement mix shares performance
Anhydrite Which product documentation applies? That a cement-system route applies
Latex Which formulation and interface are named? That it is compatible by label alone
Patch What condition and extent are recorded? That a repair is approved
Primary deck covering Which applicable vessel approval path is named? That any named supplier is approved
Final finish Which supplier accepts the prepared surface? That underlay is the wearing surface
Separate a product question from a DIY repair question.

A skilled applicator still needs the specified product’s instructions and the project geometry; experience doesn’t make an unidentified compound interchangeable with the selected system. If an enquiry begins with a tool or a repair suggestion, bring it back to the observed condition and named construction before discussing work.

  • “Can we pour it?” asks about a documented placement action.
  • “Can we patch it?” asks about a condition and an authorized corrective route.
  • “Can we cover it?” asks about the finish supplier’s release requirements.

Close With the 4-Record Deck Handover

Close With the 4-Record Deck Handover — YIBO

The 4-Record Deck Handover is designed to assist in the organization of a deck meeting among the shipyard, applicator, coating team, and finish supplier. It organizes geometry, layer sequence, condition, and finish-release questions. The 4-Record Deck Handover is neither an industry standard, an engineering calculation, a certificate, nor permission to release work.

  1. Geometry record: drawing reference, datums, drains, threshold, level surfaces or required falls.
  2. Layer-sequence record: substrate, prep, coating, primer, underlayment, adhesive and final floor documents.
  3. Condition record: notes/drawings, observed photos of cracks/transitions, location, date and unresolved questions.
  4. Finish-Release Record: the relevant acceptance criteria, version of the document, and the accountable owner of the decision.

Use the checklist to discover missing information early, then direct model, density and quotation questions back to the non-self-levelling screed underlay product page. When the project needs a human response, provide the four records through Yibo Marine Systems contact with vessel scope and final-finish requirement.

For applicable U.S. SOLAS scope, eCFR 46 CFR 164.106 is a reason to keep product and batch or lot identity available; it isn’t a certificate for the current deck.


Geometry record, copyable fields
Drawing and revision; zone or room; datum source; drains, doorway or seam affected; stated objective: flat, level, fall or transition; survey reference; responsible reviewer; unresolved point. A hypothetical entry may say “drawing revision: absent; threshold relation: unconfirmed; release: pending,” which flags a missing decision without inventing a dimension.
Layer-sequence record, copyable fields
Deck substrate; observed condition; coating or prep document; primer or barrier document; underlayment product; adhesive or finish document; document revision; interface owner; unresolved compatibility question. The record does not decide that a coating, latex, acrylic, cement, mortar or compound is compatible; it makes the missing confirmation visible.
Condition record, copyable fields
Date; location; photo reference; observed crack, powdering, ridge, low spot, seam or transition; work history available; material identification available; safety control in place; party notified; next review point. A reported hollow sound may be recorded as an observation if it already exists in the project record, but this guide does not direct sounding, grinding, sealing, patching or a repair method.
Finish-release record, copyable fields
Final floor or tile product; required method or document; record location; conditions noted; responsible decision owner; release status; missing item; next contact. “Release pending” is a legitimate record outcome when the finish requirement, moisture information, cure condition, barrier, adhesive or supporting document is unavailable.

Frequently Asked Questions

What is self-leveling underlay?

A self-leveling underlay is a layer intended to spread over a prepared surface before a selected finish is installed, with suitability tied to the named product, deck geometry, prepared substrate and finish-system documents.
A self-leveling underlay is generally described as a layer intended to spread over a prepared surface before a selected finish is installed. The short description does not establish suitability for a ship, a sloping deck, a steel substrate or a particular final floor. The named product, required geometry, prepared substrate and finish-system documents remain controlling for the actual project.

Can you put underlayment on concrete?

Some systems are documented for concrete, but the term underlayment alone does not prove compatibility; identify the concrete or deck condition, existing coating, selected product, surface preparation and final finish before choosing a primer or application route.
Identify the concrete or deck condition, existing coating, selected product, surface preparation and final finish before choosing a primer or application route. For a marine project, the installed system and approval scope must also be checked, because domestic concrete advice cannot automatically be transferred to a vessel. ASTM’s public concrete-and-resilient-flooring scope is a boundary, not a marine instruction.

How long before you can tile on rapid-drying screed?

The waiting time depends on the specified screed, conditions and finish requirements, with the material, conditions, method, measurement record and finish supplier’s acceptance criterion recorded before installing the finish.
Record the specified material, conditions, required method, measurement record and finish supplier’s acceptance criterion before interpreting any release milestone. Use the relevant current documents rather than a generic interval, because access for workers and permission to install a final finish may be different documented decisions. The rapid-drying label does not remove the need for an applicable, recorded release decision.

What is the difference between self-leveling concrete and self-leveling underlayment?

The names alone do not establish a final use, placement route or final-floor suitability for an entire floor; check the named product’s intended use and the finish requirement.
Check the named product’s intended use and the finish requirement; this guide does not offer a generic performance comparison.

Why is my uneven floor soft and powdery on top?

A soft or powdery surface is an observation; secure the area and preserve evidence before any repair decision, including photographs, location, material identification, available batch information and the layer sequence for the accountable parties.
First control access and any site hazard according to the project’s safety arrangements; a surface observation does not establish a cause or authorize work. Preserve photographs, location, material identification, batch information where available, layer sequence and the current drawing or finish record. Route those facts to the accountable parties and compare them with the named system requirements before choosing whether a grinder, sander, grinding, sealing, patching or another action is appropriate; this guide does not prescribe a repair.

Can this checklist certify the completed deck?

The checklist organizes records for project teams to review efficiently; it cannot certify a completed deck, because acceptance and certification remain tied to the applicable project, product and approval requirements for the named construction and vessel.
Acceptance and certification remain tied to applicable project, product and approval requirements.

Why We Focus on the Handover Record

The non self levelling screed underlay guide is published to assist project teams in their discussions on geometry, layer interfaces and the records required for handover. The source notes identify public standards summaries and their limitations, but the examples provided are hypothetical and don’t describe any work undertaken in a shipyard. Complete the record sheets and submit them to address a specific query so that product parameters and application requirements for the selected construction can be obtained.

References & Sources

  1. ISO 5694:2023, Ships and marine technology: Deck covering public scope only.
  2. eCFR 46 CFR 164.106, Primary Deck Coverings for SOLAS Vessels U.S. SOLAS scope only.
  3. AMPP SC 05 Surface Preparation – committee overview, not a test method.
  4. ASTM F710-26 concrete and resilient-flooring scope only.
  5. FHWA LTBP Concrete Deck Protocol, 2016, archived bridge-documentation analogy only.
  6. OSHA 1915.81, Housekeeping, shipyard employment scope only.
  7. DLA MIL-PRF-3135 catalogue record naval-vessel scope only.
]]> https://yibomarine.com/blog/non-self-levelling-screed-underlay-guide/feed/ 0 Self-Levelling Screed Underlay for Ship Decks: From Preparation to Floor Handover https://yibomarine.com/blog/self-levelling-screed-underlay-guide/ https://yibomarine.com/blog/self-levelling-screed-underlay-guide/#respond Mon, 14 Sep 2026 05:14:53 +0000 https://yibomarine.com/?p=2131



Self-Levelling Screed Underlay: 7 Ship-Deck Checks


Self-Levelling Screed Underlay is the preparatory layer to be covered by the floor wearing surface. The challenge for the yard and for the installer is to determine exactly when that surface has been prepared sufficiently so that the next trade can continue, considering the surface and drainage profile, the deck details and the associated evidence.

Use these seven checks as a project coordination guide. The suggested records supplement the approved installation procedure; they do not set product mixing ratios, cure times or vessel approval requirements.

A layer can appear ready without establishing whether a primer document has been filed or an issue with a drainage detail has been finalized. Establish the selected build-up with controlled instructions, then carry sufficient evidence to a defined release point.

Where self-levelling screed underlay fits in a ship floor

Where self-levelling screed underlay fits in a ship floor — YIBO

Marine underlay is part of the deck’s build-up; the finished wearing surface is a separate design component. First determine which drawing layer has been defined as the underlay, what supports it, and what it will carry in turn. These interfaces are more important than whether a bag or search result calls the material screed, compound, or leveler.

Scope check: The public catalogue for ISO 5694:2023 covers cement-type underlays and excludes the floor coverings laid over them, such as tile, carpet and rubber. That catalogue scope does not establish a particular product’s suitability or approval.

The US Coast Guard’s finishes guidance reproduces the FTP Code definition of primary deck covering as the initial flooring upon deck plating consisting of any primary coat, anticorrosive compound or adhesive needed for preservation or binding. Using the definition, clarify the drawing, ensure the applicable project approval requirements are checked, and confirm the result.

  • Deck or existing substrate: The deck or substrate; what material; which existing primer or coating should remain in place?
  • Underlay and interface layers: use the names and revisions shown in the selected system.
  • Finish flooring: Define the wearing finish, applicable interlayer and adhesive in concert.

Use Yibo self-levelling screed underlay information for product data and store it next to the project data. Keep primary deck covering and underlay as separate project categories; the names alone don’t make the systems interchangeable.

Check 1: Confirm the underlayment and finish system

Check 1: Confirm the underlayment and finish system — YIBO

The work pack issued to the site, with an index both the screed crew and installer can use, should identify the chosen underlayment for installation. Agree in advance what documentation shall be used for the next floor installation. Record the revision status of the nominated documentation against the task, drawing and supplier information, and identify the person responsible for interface issues. It’s far better that the applicable revision of the supplier documentation be verified against a project requirement than for an unauthorized change to be made.

A useful document-control example: NAVSEA Standard Item 009-026 FY28 CH1, dated 31 March 2026, requires a current NAVSEA-reviewed ASTM F718, or the manufacturer’s technical data sheet where none exists, to be maintained for the supervisor. Clause 3.2.2 sets document precedence within that Navy work scope; neither provision grants a general approval for commercial ship installations.

Keep the issued work pack index simple for use by the screed crew and installer together; list interface questions and mark which the teams have resolved and which remain open.

  • The specific designation of the materials, intended compartment, and vessel or flag conditions as identified by the project authority.
  • The selected deck substrate, preparation method, and primer decision, including any approved deviation or concession.
  • The limits of the underlay thickness, including the applicable finishing materials or adhesive.
  • Applicable installation instructions, safety data sheets and inspection requirements.
  • The authority to approve deviations or concessions and to authorize subsequent operations.

Illustration – interface challenge example. Illustrative coordination problem: The cabin drawing specifies one flooring type; the order form specifies another. Agree what’s required, record the discrepancy and complete the interface review before re-issuing either. A change to the cabin floor covering can leave questions that the underlay data sheet can’t address by itself once the finish has been installed.

Check 2: Set the target plane, thickness and drainage

Check 2: Set the target plane, thickness and drainage — YIBO

The floor design profile shall be established and agreed before application. A smooth surface and a surface that will provide drainage answer different design questions. The designer should identify the reference plane, relevant vessel condition and deck drainage as the basis for the crew’s measurements.

“Water must flow to drains and not stand or puddle.”

Using a typical application thickness provided by a generic manufacturer data sheet as referenced can’t determine the allowed build-up where seams, depressions, thresholds, deck-drain edges or deck penetrations occur; please request profile data from your project contact for the areas in question.

Questions to settle on the profile drawing
Location Question for the responsible designer Record to retain
Dry compartment Which surface tolerance and datum apply? Drawing reference and agreed measurement method
Wet area Which areas drain, and under what assessment condition? Fall arrangement and drain acceptance requirement
High seam or threshold Can the selected build-up fit the available height? Measured feature and authorized detail
Deep local depression Does the proposed fill remain within the system limits? Depth survey and any required design disposition

Send any proposed deviation from the specified build-up thickness to the design owner, together with an assessment of its weight impact. Request details of how the non-standard profile will be achieved, and note that guidance on non-self-levelling screed underlay does not authorize an on-site substitution for the specified underlay.

Check 3: Release the surface for primer and screed

Check 3: Release the surface for primer and screed — YIBO

Surface preparation starts with the actual deck condition and the requirements outlined in the selected system instructions. Identify the type of metal, retained coating, and clearly visible damage before applying another layer. The release record indicates that an inspection has been conducted and a particular criterion has been satisfied; a visibly clean surface is not the only evidence provided to the following crew.

  • Identify: document the substrate and the amount of any coating or existing underlay left in place.
  • Inspect: point out corrosion, cracking, damaged details and contamination for the indicated assessment.
  • Document preparation: record preparation against the instructions for application, including test or inspection results where necessary.
  • Confirm the interface: The primer or documented no-primer solution to be used, including the conditions under which it applies.

NAVSEA’s cited item distinguishes underlay systems with different primer arrangements in clauses 3.7.3–3.7.4, including specified types installed without primer; consult the controlling system documents for the job in front of you.

Common assumption to remove: instructions for a basement slab or an interior floor leveling and smoothing application on interior concrete or cementitious substrates do not, by themselves, document compatibility with a coated metal deck. Keep the primer decision tied to the identified substrate and system, even when a building product is familiar to the crew.

If the prepared deck area still has an unidentified coating on a relatively small spot, record that area and obtain a disposition before it’s covered; a photograph may help locate the area, but does not replace testing or inspection required by the work pack.

Check 4: Control the mix and record each pour

Check 4: Control the mix and record each pour — YIBO

Follow the manufacturer’s mixing instructions and the relevant work pack for the chosen material and then develop an approach the crew can adopt to provide evidence that the instructions have been followed. Good handover records often identify batch, location, and any actual observation during mixing and application. The text below presents an editorial approach; actual required fields and recording intervals will be specified by the project procedures.

Within its Coast Guard vessel work scope, SFLC Standard Specification 6341 (2022), clause 3.1, directs compliance with manufacturer instructions for suitable conditions, handling, mixing and application. It does not establish a universal water ratio or a separate log for every pour.

Establish your recording strategy before you begin. For a cement-based product requiring water, this allows identification of the material, the specified quantity, the permitted water addition and the measured quantity. For another product chemistry, derive these record fields from product instruction details.

  • Placement zone, material designation and batch or lot number.
  • Instruction revision, required component quantities and actual measurements.
  • Mixing, application times, and the working conditions stipulated by the procedures.
  • Record any interruption or deviation and identify the person who determined its disposition.

What tools are needed for self-leveling underlayment?

Prior to ordering equipment, take into account the procedure, whether this will be pumped or applied manually, the specific mixer, and any drill/paddle, trowel or roller required; remember tools cited aren’t a method. Tool names such as “drill and paddle” do not by themselves define an application method for the specified build-up.

Before work: the site safety lead should review the safety data sheets and the actual mixing, preparation and coating tasks, including dust and ventilation controls where applicable. OSHA 29 CFR 1915.35 distinguishes particular solvent-containing painting operations; those provisions should not be treated as instructions for every cement or epoxy product.

For a wider application area, agree before work starts what defines an interrupted work section, how it’s identified and treated. If you overrun your prescribed ‘working window,’ don’t make assumptions; water addition or an additive to control foam is a mix change that must follow the required instructions.

Check 5: Separate foot traffic from final floor release

Check 5: Separate foot traffic from final floor release — YIBO

A decision permitting foot traffic over the underlay answers one limited access question. The release for the final floor finish will demand additional evidence involving the product, supplier, over-layer and adhesive requirements; confirm that the applicable deck-laying contract defines the interface and extent of works to be accepted, and specifies a responsible party.

Suggested release stages for a project record
Proposed operation Question to close Evidence to identify
Limited foot traffic Is access allowed under the specified conditions? Applicable instruction and observed conditions
Preparation for covering Are the required surface checks complete? Specified inspection and any required test results
Adhesive or finish installation Does the next system accept the prepared underlay? Interface requirements and responsible release
Service or cleaning Has the completed system reached its own release stage? Completed floor instructions and acceptance record

The referenced Coast Guard specification calls for access restrictions during curing and protection of completed coverings in clause 3.3. The NAVSEA cited item has several specific conditions relating to access, washing, and system examination, but these are not a universal covering time for the chosen underlay.

How long does self-leveling underlayment take to dry?

The drying assessment should reflect conditions stipulated for the specifically chosen product and its next layer; where “rapid-setting”, “ready for foot traffic” or “dry” feature in its documentation, confirm what each phrase represents according to that same document. Don’t assume.

Illustrative schedule decision: the cabin crew can enter, but the finish contractor has not received a required substrate result. Record access as permitted within its stated scope and finish installation as awaiting evidence; a single “floor ready” box would hide the difference.

For systems requiring a final layer, whether vinyl, carpet, or timber flooring, specify what will be applied, including the final flooring adhesive. Store any self-levelling deck covering product information for other flooring elements distinctly from the underlay manufacturer’s details.

Check 6: Resolve cracks, soft spots and wet areas

Check 6: Resolve cracks, soft spots and wet areas — YIBO

Before classifying, detail any actual defects to the underlay as they occurred. Record the specified location, descriptive detail, dated observations or photographs, along with the relevant construction history. Appearances and circumstances alone shouldn’t suffice in determining cause. Keep the defect explicitly open in the handover record until the responsible person or team completes the required disposition.

  1. Add the defective area to a marked drawing and retain dated observations or images.
  2. Include any other available records, such as ‘preparation’, material, or application data.
  3. Detail the necessary work pack inspection and identify who’s responsible for it.
  4. State what remedy has been accepted, and when the completed remedy will be reinspected.

The NAVSEA cited provision has a specific subclause covering defect correction after inspection of the installed, cured system and before acceptance of works; this may serve as a useful scoped guide. It shouldn’t be assumed that an alternative approach for an entirely different type of work constitutes an acceptable method.

A practical record: “Damp patch beside drain, first observed after cleaning; source unresolved” is more useful than “bad screed.” The first statement preserves an observation for investigation; the second assumes a cause and can send the repair discussion in the wrong direction.

An “accepted” or “complete for subsequent operation” date must not mask an outstanding issue. Whether sanding, removal or replacement is the proposed option, confirm with your project team how to proceed and the impact on the residual system.

Check 7: Close the Deck-to-Finish Handover Record

Check 7: Close the Deck-to-Finish Handover Record — YIBO

The following provides an overview of the essential points for the ‘Deck-to-Finish Handover Record’; this isn’t a formal standard document but an editorial template to help illustrate these points. This template may be customized to the project contract requirements and remains a work in progress until open items are resolved. All unresolved items must be carried forward for the responsible party to close out, with visibility to the next trade.

Suggested handover entries: add document references, results and responsible names; suggested closing fields: open-item number, owner, due date, handing-over party and date, receiving party and date
Entry Requirement or evidence Decision to record
Zone and system Compartment, drawing and material identities Scope of this handover
Document set Controlled work-pack and instruction revisions Conflicts resolved or still open
Deck condition Preparation inspection and retained substrate details Accepted extent and exceptions
Profile Datum, thickness survey and specified drainage checks Design departures and disposition
Primer interface Required primer record or documented alternative Interface accepted or evidence pending
Placement Material lots and required mixing or pour records Deviations and their closure
Access Specified foot-traffic conditions and evidence Permitted activity and limitations
Covering interface Required surface results and next-layer instructions Release for the named covering operation
Defects Issue locations, disposition and reinspection Closed items and remaining exclusions
Next trade Handover recipient and supporting attachments Accepted area, date and outstanding actions
Closing fields Open-item number, owner and due date Handing-over party/date and receiving party/date

Illustrative example only; this is not a Yibo project handover record. In cabin ‘A’ the controlled work pack calls for primer; however, the application record is still not presented. The entry names the issue, lists the responsible party and indicates that final work awaits the required records and acceptance.

Avoid defaulting every row to “pass.” An open item needs an owner and a next action, while an accepted row needs enough detail for the receiving contractor to understand what was accepted.

For a Yibo inquiry, consider attaching the specific compartment/deck description, intended build-up, target finish, exact material designation and pertinent project documents. Direct such discussions via the self-levelling screed underlay product page and request the project-specific technical information needed to assess the proposed build-up.

Self-levelling screed underlay FAQs

Self-levelling screed underlay FAQs — YIBO

What is self-leveling underlay?

Self-leveling underlay is typically a layer underneath the floor finish. Check the applicable deck specification and floor build-up. ISO 5694:2023 distinguishes cement-type underlays from overlaid coverings; its public scope does not establish a material’s waterproofing, substrate suitability or compartment approval.

Is screeding the same as self-leveling?

A self-leveling material flows during placement, while screeding must achieve the required surface profile; similar product terminology, such as self leveling underlayment, doesn’t establish interchangeability. Confirm the intended outcome, including the smooth floor, level surface, profile and drainage, against the named product specification, placement method and controlled installation instructions for the compartment and deck condition in the work pack.

What do you put down before self-leveling compound?

Across large areas or a small area, follow the specified system’s preparation requirements for wood flooring or another finish; prime only where those instructions require it. That can mean a primer; however, the requirement comes from the actual installation documentation. Start by comparing the current application and substrate. The existing coating alone does not establish compatibility, and a concrete-floor primer recommendation for a different underlayment does not make a system compatible with this ship’s deck.

What is the best self-leveling underlayment?

The initial check starts with proven applicability to the compartment, substrate, profile, and finished floor. Compare the exact product instructions with the actual installation conditions, including thickness, preparation, mixing, and release requirements. For a Yibo product, specify exactly what variant is being considered. Find the current documents for this variant, proposed finish, and adhesive.

  • A bag of self leveler or a “one-component” description identifies neither the complete installation method nor the receiving subfloor requirements.
  • Ask which drawing and procedure support the proposed thin layer at the highest point.
  • For flooring projects with several trades, name the person who will resolve missing interface information.

A durable, long-lasting floor is the desired outcome. Neither term offers a real acceptance guideline. Consider the documented constraints and unanswered questions before evaluating whether a familiar product may offer an acceptable substitute.

Can foot-traffic readiness release the final floor finish?

Foot-traffic readiness does not release the final covering installation or confirm suitability for the next layer. Verify the specified underlay, adhesive and finishing conditions against the applicable project documents, and retain required documented authorization for that named floor covering operation.

References & Sources

Written by Aurora. This guide presents public-source information and suggested project records; it contains no first-hand Yibo installation test results or independently verified Yibo project case.


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