Moisture and bond test record before resinous floor install

Direct answer

Before resinous floor install, a concrete slab surface moisture and adhesive bond test photo record should identify the project, floor area, slab age and placement history where known, vapor retarder status where known, resinous system, manufacturer limits, test method, test locations, ambient conditions, slab temperature, relative humidity, dew point margin, in-situ RH values, calcium chloride results where used, plastic sheet observations where used, pH result where required, surface contaminants, curing compounds, laitance, concrete surface profile, prepared sample area, primer or test patch lot, bond or pull-off test method where specified, failure mode, photos, exceptions, corrections, retests, witness, and release boundary.

A dry-looking slab is not proof. A grinder pass is not proof. A successful mockup in one room is not proof for the whole floor. The record should show the measured moisture condition, the prepared surface condition, the resinous system limits, and the exact area that is released for installation.

Use this field note as documentation guidance only. The resinous flooring manufacturer, approved specification, ASTM methods, ICRI or project surface-profile requirement, moisture mitigation system, engineer of record, flooring installer, concrete contractor, testing agency, owner, AHJ where applicable, safety data sheets, and site safety plan control the actual testing, preparation, installation, cure, acceptance, and warranty.

Why resinous floors fail before they start

Resinous flooring failures often begin before the first coat is mixed. Moisture is moving through the slab. The surface profile is too tight. The slab still carries curing compound, sealer, oil, laitance, dust, salts, or patching residue. The bond test was done in a clean mockup area while the production area has different history. The installer gets a green light from a single number without a map, photos, or exceptions.

The weak packet says moisture OK and floor prepped. The strong packet shows the test method, locations, values, manufacturer limits, ambient conditions, surface profile, contaminant checks, bond-test area, failure mode, photos, corrections, and release boundary.

ASTM F710, F2170, F1869, D4263, D7234, and C1583 each answer different questions. Manufacturer guides from Sherwin-Williams, Sika, Tnemec, and others also point to the same practical truth: concrete moisture, surface preparation, profile, and bond need to be documented before the coating or resinous system covers the evidence.

Start with the system limits

The first page of the record should name the resinous system, primer, moisture mitigation product if used, broadcast aggregate, mortar, topcoat, manufacturer, product data sheet, approved specification, surface profile requirement, substrate requirements, temperature and humidity limits, dew point rule, recoat window, and cure time.

Do not use a generic moisture number from another system. Sherwin-Williams floor evaluation guidance shows that moisture limits can vary by flooring system and product family. Sika's surface preparation guide similarly frames concrete evaluation and preparation around the flooring products being installed. The accepted limit is the one tied to the actual system and substrate condition.

If the project has a moisture mitigation primer, vapor control membrane, or alternate primer, document whether the test result is being used to release the standard resinous system or to trigger the mitigation system. Do not blur those two decisions.

Map the slab into release zones

Create a floor map before interpreting results. Divide the work into release zones by room, pour, slab age, elevation, vapor retarder condition where known, prior flooring history, wet-area exposure, patching area, trench infill, door threshold, expansion joint, equipment pad, and resinous system type.

Each test photo should tie back to that map. A calcium chloride dome, RH probe, plastic sheet, pH spot, CSP comparison, or bond test should be labeled with the zone, gridline, room, date, and test ID. A later reviewer should be able to stand in the room and find the same location.

Do not let a passing test at the center of the room release a perimeter trench patch, old kitchen line, washdown area, slab-on-grade addition, or equipment pit. The record should state what area each result represents.

Choose the moisture method on purpose

In-situ RH testing, calcium chloride testing, plastic sheet observation, surface meter screening, and manufacturer-specific checks do not measure the same thing. Use the method required by the specification and manufacturer, and state what the result does and does not prove.

ASTM F2170 covers determining relative humidity in concrete slabs using in-situ probes. ASTM F1869 covers moisture vapor emission rate using anhydrous calcium chloride on bare concrete. ASTM D4263 indicates capillary moisture with a plastic sheet method before coating. AMPP and Tnemec moisture guidance describe these methods as different tools with different limits.

A surface meter scan may help find suspicious zones, but it should not replace the specified method unless the manufacturer and specification allow that. A plastic sheet observation can identify surface moisture risk, but it should not be treated as a complete internal slab moisture profile.

Record RH and MVER without hiding context

For in-situ RH results, record probe ID, hole depth basis, slab thickness basis, location, insertion time, equilibration requirement, reading time, RH percentage, slab temperature, ambient temperature, ambient relative humidity, and whether the reading is within the resinous system limit.

For calcium chloride results, record kit ID, location, start time, stop time, exposure duration, temperature and humidity range, MVER result, slab condition, whether the test was on bare concrete, and whether the result is within the product limit.

Do not copy values into the final packet without the test report. The photo record should include the probe or dome in place, location label, finished result, and the page that states the product limit used to decide release.

Surface moisture is not the only slab risk

A resinous floor can also be affected by pH, salts, oil, grease, curing compound, sealer, dust, laitance, soft surface paste, carbonation, patching compound, adhesive residue, and prior chemical exposure. Record which checks were required and which were performed.

ASTM F710 is written for resilient flooring, not resinous flooring approval, but its scope and manufacturer-deference language are useful reminders for concrete floor acceptability, preparation, moisture vapor retarder context, and the need to follow the flooring manufacturer's written instructions. Manufacturer resinous flooring guides are more important for the actual system decision.

If the specification requires pH testing, water-drop testing, oil testing, chloride testing, surface tensile testing, or a mockup, keep those records with the moisture packet. A passing moisture value does not clean oil out of a slab.

Profile and cleanliness need their own proof

Concrete surface profile should be documented after preparation and before primer. Record the preparation method, grinder or shotblast equipment, tooling, passes, dust collection, vacuuming, edge work, detail areas, repairs, and the CSP target from the specification or manufacturer.

ICRI surface preparation guidance and CSP chips exist because surface profile is visual and tactile, not just a sentence in a submittal. DeFelsko describes CSP chips as comparators used to identify prepared concrete roughness. Sherwin-Williams and Sika both emphasize surface preparation as a critical factor for applied floor systems.

Photograph the CSP comparison in each release zone, including the chip or comparator, prepared surface, room or grid label, and date. If edges, corners, trenches, drains, or patched areas have a different profile, photograph those separately.

Bond tests and pull-off tests need failure mode

If the specification or manufacturer requires a bond test, test patch, mockup, pull-off test, or direct tension test, record the method, location, surface preparation, resinous products used, batch or lot where required, cure time, test equipment, dolly size where applicable, result, and failure mode.

ASTM D7234 covers pull-off adhesion strength of coatings on concrete using portable pull-off adhesion testers. ASTM C1583 covers tensile strength of concrete surfaces and bond strength or tensile strength of concrete repair and overlay materials by direct tension. Those methods do more than produce a number; the fracture surface and failure mode matter.

A glue failure, substrate failure, cohesive coating failure, adhesive failure at the interface, or mixed failure does not tell the same story. Photograph the test location before testing, the attached dolly or test area, the gauge or result, the broken surface, and the labeled sample after the test.

Ambient conditions can invalidate a good surface

Record ambient temperature, ambient relative humidity, slab surface temperature, dew point, dew point margin, ventilation status, temporary heat status, air conditioning status, open doors, washdown, rain event, wet trades, and whether the slab was exposed to water after testing.

Sherwin-Williams surface preparation guidance includes dew point context, and resinous flooring product data sheets commonly restrict installation by substrate temperature, ambient temperature, relative humidity, and dew point separation. The record should show that the tested condition still matched the installation condition.

If moisture testing passed on Monday but the slab was washed, rained on, flooded, or left under high humidity before Friday install, do not rely on the old release without the manufacturer's accepted retest or recheck process.

Repairs, patches, and joints are separate decisions

Trench infills, crack repairs, control joints, expansion joints, drain details, patched spalls, floor leveling material, feather finish, and old adhesive removal areas can behave differently from the original slab. The record should identify which materials were used and whether they are compatible with the resinous system.

Do not let a slab moisture test in original concrete release a fresh patch unless the manufacturer and specification allow that. Do not let a CSP photo in the open field release a hand-ground inside corner or drain body.

If the resinous system bridges cracks, follows joints, honors joints, turns up cove base, or ties into drain details, the release record should state which details are ready and which are held.

Use a compact preinstall table

Use the manufacturer's preinstall form, testing agency report, flooring installer checklist, or owner quality form first. Add a field table where those forms do not connect the zone map, moisture result, surface profile, bond test, photos, exceptions, and release decision.

Build the photo packet

A strong photo packet includes a floor map, each test location, RH probe hole or sleeve, calcium chloride dome where used, plastic sheet where used, pH or contamination test where required, CSP comparison, prepared surface wide view, edge and drain details, bond-test area, test patch, pull-off fixture, result gauge or report, fracture surface, correction photos, and final release signoff.

Name files with zone, room, test ID, method, and date. A photo named Z2-Room118-F2170-Probe04-Reading is more useful than a camera roll number. Put the photos next to the actual test report and manufacturer limit page.

Do not edit photos in a way that hides a failed location. If a test failed and was corrected, keep both the failed condition and the corrected retest.

Before resinous floor install checklist

Run this check before representing a slab area as ready for resinous flooring primer, moisture mitigation, mortar, broadcast, or topcoat.

• Confirm the basis: approved specification, resinous system, product data sheets, manufacturer limits, surface profile target, moisture test method, bond test requirement, and installer procedure.
• Map release zones by room, pour, patch, prior flooring, trench, wet area, floor drain, equipment pad, and resinous system type.
• Record slab history where known: age, vapor retarder status, curing compound, prior coating, wet exposure, patches, and recent cleaning or flooding.
• Perform required moisture tests by the accepted method and record locations, IDs, times, ambient conditions, slab temperature, results, and product limits.
• Record pH, salts, oil, grease, curing compound, sealer, dust, laitance, adhesive residue, and other contaminant checks where required.
• Prepare the concrete surface using the accepted method and document equipment, tooling, passes, vacuuming, edge work, and repair areas.
• Photograph CSP comparisons in every release zone, including corners, drains, patches, coves, and detail areas that differ from the open field.
• Perform bond test, test patch, mockup, pull-off, or direct tension test where specified, and record cure time, result, failure mode, and photo evidence.
• Compare all results with the actual resinous system limits, not a generic number from another product.
• Log exceptions: high RH, high MVER, condensation, high pH, wrong CSP, contamination, soft surface, failed bond, wet patch, or missing report.
• Retest after correction and attach updated photos, reports, manufacturer or engineer acceptance, and revised release map.
• State the release decision: ready for primer, moisture mitigation required, zone held, bond test held, mockup only, reinspection required, or owner/manufacturer exception.

Weak and strong records

Weak note: Moisture passed. Floor prepped. Epoxy can start.

That note does not identify the slab area, method, values, product limits, test locations, ambient condition, CSP, contaminants, bond-test result, exceptions, or release boundary.

Stronger note: Resinous floor preinstall record completed on 2026-06-09 for Zone B, Rooms 112 through 119, slab-on-grade pour SOG-B2, Sherwin-Williams epoxy broadcast system per specification 09 67 23 and approved submittal revision 4. Manufacturer limit page, surface prep guide, and floor evaluation chart are attached. Release map identifies seven RH probe locations, two calcium chloride locations requested by the owner, pH spots at drains D-4 and D-5, and three CSP comparison photos after shotblast.

F2170 probe readings in Zone B ranged from 72 percent to 78 percent RH against the submitted system limit. Calcium chloride results were 2.4 and 2.8 lb per 1000 sq ft per 24 hours where tested. Ambient at release was 72 F, 48 percent RH, slab surface 69 F, with dew point margin recorded by the installer. CSP comparison photos show CSP 3 to CSP 4 in open field and CSP 2 at the north cove base return before correction.

North cove base return was re-ground and vacuumed, then photographed with CSP 3 comparison at 15:10. Test patch TP-B-1 cured per manufacturer instruction and pull-off test was performed by the flooring installer with owner witness. Failure was cohesive in concrete at the tested patch, with report and fracture photos attached. Zone B is released for primer only. Janitor closet 119A remains held because pH result at old chemical storage area was outside the submitted limit pending manufacturer direction.

The stronger note works because it ties the system limit, slab zones, moisture values, ambient condition, surface profile, bond evidence, correction, and release boundary together.

Common mistakes

The first mistake is treating a dry-looking slab as a test result. Appearance is not a moisture method.

The second mistake is using one passing probe or dome to release every room, patch, drain, trench, and old flooring area.

The third mistake is documenting moisture but ignoring surface profile, contaminants, pH, dust, or soft surface paste.

The fourth mistake is photographing the test kit without the location label or map reference.

The fifth mistake is treating a bond test number as complete without the failure mode and fracture photo.

The sixth mistake is using limits from a different resinous flooring product or from a prior project.

The seventh mistake is deleting failed tests after correction. The failed condition and retest are part of the closeout chain.

When to hold the install

Hold the install if moisture results exceed the submitted system limit, the method is wrong, the locations are not mapped, the report is missing, the slab was wetted after testing, or the release area does not match the tested area.

Hold the install if the surface profile is too tight, too aggressive for the system, inconsistent at edges, not photographed, contaminated, dusty, oily, soft, sealed, or covered with curing compound or residue.

Hold the install if the bond test or mockup failed, the failure mode is not recorded, the test patch used different material or preparation, the cure time was not met, or the manufacturer has not accepted the result.

Hold the install if ambient conditions are outside product limits, the slab temperature is too close to dew point, temporary HVAC is unstable, wet trades are still active, or the owner expects warranty coverage without the required manufacturer documentation.

Owner handoff record

The owner should receive the release map, moisture reports, ambient logs, CSP photos, contamination checks, bond-test results, failed-condition photos, correction photos, manufacturer acceptance notes, installer release decision, and remaining holds.

This handoff matters after turnover. If a blister, debonded patch, vapor issue, or chemical exposure claim appears later, the owner needs to know which zones were tested, what values were accepted, and whether a held area was later corrected.

If the owner uses a maintenance system, attach the record to the floor area, room, or asset served by the resinous floor rather than leaving it only in the construction closeout folder.

Questions that come up

Does this replace the manufacturer's preinstall checklist? No. Use the manufacturer's checklist first. This record organizes the field evidence so the checklist, test report, photos, and release decision stay connected.

Is F2170 better than F1869? The required method depends on the specification and product manufacturer. F2170 measures internal relative humidity. F1869 measures moisture vapor emission rate from bare concrete. They are not interchangeable unless the accepted documents say so.

Is the plastic sheet method enough? It can indicate capillary moisture at the surface, but it is not the same as an in-situ RH or calcium chloride result. Treat it as the method required or allowed by the project, not as a universal release test.

Do all resinous floors need pull-off testing? No universal answer. The specification, manufacturer, owner, substrate risk, and warranty requirements decide whether a test patch, pull-off test, direct tension test, or mockup is required.

What if the slab passes moisture but fails bond? Hold the install and resolve the surface preparation, contamination, substrate strength, primer, cure, or product compatibility issue with the responsible parties.

Can a moisture mitigation system bypass the problem? Only if the product, test result, surface condition, and manufacturer instruction support that use. Record the mitigation basis and do not release the standard system by mistake.

Compliance and safety limits

This field note is not a resinous flooring specification, moisture mitigation design, ASTM interpretation, ICRI interpretation, warranty approval, substrate acceptance, bond-strength guarantee, chemical compatibility decision, safety data sheet, silica exposure plan, lockout/tagout procedure, or AHJ approval. The approved specification, manufacturer instructions, product data sheets, testing agency, engineer of record, flooring installer, owner, AHJ where applicable, and site safety plan control the work.

Do not use this checklist to bypass permits, qualified-worker requirements, silica controls, respirator rules, grinding and shotblasting controls, dust collection, ventilation, hot-work or ignition controls, chemical PPE, SDS requirements, temporary HVAC rules, waste handling, moisture mitigation requirements, manufacturer written approval, warranty requirements, or final acceptance. The packet preserves slab moisture, surface preparation, and bond-test evidence. It does not authorize unsafe work or resinous floor installation.

Sources checked

• ASTM, F710 Standard Practice for Preparing Concrete Floors to Receive Resilient FlooringUsed for concrete floor acceptability and preparation context, including manufacturer instruction limits and moisture vapor retarder context.
• ASTM, F2170 Standard Test Method for Determining Relative Humidity in Concrete Floor SlabsUsed for in-situ relative humidity test context and the limits of location-specific moisture results.
• ASTM, F1869 Standard Test Method for Moisture Vapor Emission RateUsed for calcium chloride moisture vapor emission test context on bare concrete slabs.
• ASTM, D4263 Standard Practice for Indicating Moisture in Concrete by the Plastic Sheet MethodUsed for capillary moisture indication before coating and the limits of plastic sheet observations.
• ASTM, D7234 Standard Test Method for Pull-Off Adhesion Strength of Coatings on ConcreteUsed for pull-off adhesion strength context, including fracture surface and weakest-plane interpretation.
• ASTM, C1583/C1583M Pull-Off Method for Concrete Surfaces and Overlay MaterialsUsed for direct tension pull-off context around concrete surface tensile strength and overlay bond evidence.
• ICRI, Introduction to Technical Guideline No. 310.2R-2013Used for concrete surface preparation context for sealers, coatings, polymer overlays, and repair materials.
• DeFelsko, ICRI Concrete Surface Profile ChipsUsed for CSP chip comparison context and documenting prepared concrete roughness.
• Sherwin-Williams, Concrete Surface Preparation Guide G-1Used for resinous flooring surface preparation, moisture testing, dew point, and substrate documentation context.
• Sherwin-Williams, High Performance Flooring Evaluation GuidelinesUsed for product-specific moisture limit context and floor evaluation before Sherwin-Williams resinous systems.
• Sika, Surface Preparation GuideUsed for resinous flooring surface evaluation, sound substrate, cleanliness, and preparation requirements.
• AMPP, Concrete Moisture Testing and MitigationUsed for practical moisture-testing context covering plastic sheet, calcium chloride, and relative humidity methods.
• Tnemec, Three Ways to Test Concrete MoistureUsed for coatings-oriented moisture testing context and comparison of common concrete moisture test methods.

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