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Site QA/QC checklists
Checks before, during and after the works for each system family: surface acceptance, moisture, corners, primer, thickness, laps, terminations, protection and the flood test.
How to use the checklists
- Each system family has one checklist in three stages: before, during and after the works.
- A hold point ◆ means the next stage does not start before inspection and sign-off.
- Each item gives a method and an acceptance criterion in general terms; the actual values come from the approved specification, the product TDS and the inspection and test plan (ITP).
- The printed copy is a site form: inspection details at the top, a remarks column and space for signatures.
Sheet membranes
Bituminous, PVC, TPO and EPDM sheets: from surface acceptance to protection before cover.
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Before: surface acceptance
Method or record Visual check and hammer tapping; repairs recorded
Acceptance No hollow sound, loose material or sharp edges; repairs cured
Method or record Moisture check by the system’s method, e.g. ASTM D4263
Acceptance Dry by the specified test: no darkening or condensation under the test sheet
Method or record Water test or level check; ponding marked
Acceptance No ponding beyond the limit set in the specification
Method or record Visual, against the detail drawings
Acceptance Fillets continuous at every internal corner, sized as drawn
Method or record Walk-round against the drawings; open items listed
Acceptance All fixed in their final position; no later cutting of the membrane
Method or record Compatibility per the manufacturer
Acceptance No direct contact between incompatible materials
During application
Method or record Visual and touch-dry check; batch recorded
Acceptance Even cover with no bare spots; touch-dry before torching
Method or record Visual check of each detail before the field sheets
Acceptance Every detail strip in place and bonded, as detailed
Method or record Random measurement, recorded
Acceptance Laps not below the specified width; staggered as specified
Method or record Probe every seam; peel samples where required
Acceptance No open seams; peel samples tear in the sheet, not in the seam
Method or record Height measured; termination bar and sealant checked
Acceptance Height not below the specified minimum; top edge fixed and sealed
Method or record Checked against the fixing plan
Acceptance Fastener count and spacing match the plan in field, perimeter and corners
Method or record Permit and fire-watch log checked daily
Acceptance Valid permit; extinguisher at hand; area checked after work stops
After: testing and handover
Method or record See the flood-test checklist
Acceptance Passed and signed before any cover
Method or record Defects marked, numbered and re-inspected
Acceptance Every marked defect closed and signed off
Method or record Photographed before it is covered
Acceptance Membrane fully covered and undamaged before other trades start
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Liquid membranes
Polyurethane, polyurea and clear PU coating: moisture, primer, thickness and cure.
0 of 17
Before: surface acceptance
Method or record Visual; mechanical preparation recorded
Acceptance Clean, sound, open surface; no contamination left
Method or record Measured and recorded, e.g. ASTM D4263 or a moisture meter
Acceptance Reading within the TDS limit before priming
Method or record Visual, against the crack map and details
Acceptance Cracks treated as specified; fillets at every internal corner
Method or record Logged at the start and during the shift
Acceptance Surface temperature above the dew point by the specified margin
Method or record Tap test of the tiles; an adhesion test patch where needed
Acceptance No hollow tiles or open joints; the test patch adheres
During application
Method or record Product, batch and time recorded
Acceptance Correct primer, even cover; next coat within the recoat window
Method or record Visual check at each detail
Acceptance Fabric fully embedded; no wrinkles or dry areas
Method or record WFT gauge readings; material used ÷ area
Acceptance No reading below the specified film; consumption not below the rate
Method or record Coat log per area, with times
Acceptance All coats in the specified directions, within their recoat windows
Method or record Visual, in good light
Acceptance Continuous film; every defect repaired and re-coated
Method or record Rig log and a test patch checked before work
Acceptance Settings within the product limits; test patch cures evenly, nothing soft or tacky
After: testing and handover
Method or record Barriers and signs; cure time recorded
Acceptance No traffic marks or rain damage before cure
Method or record Samples or gauge
Acceptance Not below the specified minimum dry-film thickness
Method or record Pull-off to ASTM D7234 on concrete
Acceptance Value not below the specification; failure mode recorded
Method or record See the flood-test checklist
Acceptance Passed and signed before any cover
Method or record Visual check of the exposed areas
Acceptance Every exposed area covered, with no gaps
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Cementitious and crystalline
Cementitious coatings and crystalline treatments: concrete repair, open pores, pre-wetting, coverage and moist curing.
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Before: surface acceptance
Method or record Visual; repairs and plugging recorded
Acceptance No active leak; repairs cured before coating
Method or record Water jetting or grinding; visual check
Acceptance Open, absorbent surface: water soaks in, it does not bead
Method or record Checked against the crack map and joint layout
Acceptance No moving crack or joint left under a rigid coat
Method or record Visual and touch check before each coat
Acceptance Saturated surface-dry: damp and dark, no free water
Method or record Visual, against the details
Acceptance Fillets continuous and sound where specified
During application
Method or record Watched at mixing; batch and times recorded
Acceptance Whole packs, the specified liquid; no re-tempering of a stiffening mix
Method or record Material used ÷ area; thickness check
Acceptance Consumption not below the specified rate; even, complete cover
Method or record Visual check at corners, joints and penetrations
Acceptance Embedded between coats; no wrinkles or gaps
Method or record Shading and timing planned; conditions logged
Acceptance No rapid drying, crazing or dusting
After: testing and handover
Method or record Curing log
Acceptance Kept damp for the full specified period
Method or record Visual check and tapping
Acceptance Continuous, bonded coat; defects repaired
Method or record A water test suited to the element; observation log
Acceptance No damp patches or leaks over the observation period
Method or record Dates recorded per area
Acceptance Following trades start only after the specified time
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Geomembrane liners
HDPE liners for lakes, channels and tanks: subgrade, seams, non-destructive testing and cover.
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Before: surface acceptance
Method or record Visual check; signed acceptance
Acceptance Smooth, firm surface signed off before deployment
Method or record Visual check; overlaps measured at random
Acceptance Full cover; overlaps not below the specified width
Method or record Measured against the drawings
Acceptance Dimensions as drawn; edges rounded
Method or record The approved layout drawing on site
Acceptance Panels numbered; seams run down the slope where possible
During application
Method or record Peel and shear tests on the trial seams
Acceptance Trial seams pass before production welding starts
Method or record Welder, machine and settings logged per seam
Acceptance Continuous seams; no burns, wrinkles or dirt
Method or record Weather and liner temperature logged per shift
Acceptance No wind uplift; no welding outside the allowed conditions
Method or record Visual check; vacuum box on the welds
Acceptance Every penetration sealed with a tested boot
After: testing and handover
Method or record ASTM D5820 · ASTM D5641
Acceptance Pressure held or no bubbles over the test; failures repaired and re-tested
Method or record Samples cut, labelled and the holes patched
Acceptance Laboratory results meet the specification
Method or record Repair log with the test results
Acceptance Every repair tested and located on the as-built plan
Method or record Supervised placement
Acceptance No equipment directly on the liner; no damage
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Tank linings
Tank linings including drinking-water tanks: approval, confined-space safety, repairs, continuity and cure before filling.
0 of 14
Before: surface acceptance
Method or record The certificate itself checked
Acceptance A valid approval covering the product and its conditions of use
Method or record Permit, gas readings and the attendance log
Acceptance Safe readings before entry and throughout the work
Method or record Repairs recorded
Acceptance No active leak; repairs cured
Method or record Moisture and profile; pull-off where specified
Acceptance Moisture, profile and strength within the system limits
Method or record Visual, against the details
Acceptance Fillets continuous; every pipe entry sealed as detailed
During application
Method or record Conditions logged
Acceptance Within the limits for the whole application and cure
Method or record Watched at mixing; batch and times recorded
Acceptance Full kits mixed mechanically; nothing used past its pot life
Method or record Gauge readings per coat
Acceptance No reading below the specified wet film; each coat within its recoat window
Method or record Fans running; gas readings logged
Acceptance Fresh air kept up until the lining has cured
After: testing and handover
Method or record ASTM D4787
Acceptance No holidays; every indication repaired and re-tested
Method or record Gauge, samples or consumption, as the specification allows
Acceptance Not below the specified minimum dry-film thickness
Method or record Cure log
Acceptance Filled only after the specified cure time at the recorded temperature
Method or record Tightness test where specified, e.g. ACI 350.1
Acceptance Water loss within the test criteria; cleaning and disinfection recorded
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Crack and joint injection
Polyurethane and epoxy injection: diagnosis, packers, injection sequence and verification.
0 of 11
Before: surface acceptance
Method or record A map with widths and moisture; an engineering decision for structural cracks
Acceptance Every crack located, classified and given an approved treatment
Method or record Per the specification
Acceptance Resin type approved for each crack before drilling
Method or record Visual check
Acceptance Crack mouth visible and free of dust and loose material
During application
Method or record Packer spacing and angle checked; holes flushed
Acceptance Each hole crosses the crack; spacing as specified
Method or record Visual check before injection
Acceptance Seal continuous and hard before pressure is applied
Method or record Pressure and quantity logged per packer
Acceptance Resin travel or refusal reached at each packer, as logged
Method or record Pressure gauge read and logged
Acceptance No reading above the product or equipment limit; no new cracking
After: testing and handover
Method or record Visual check
Acceptance A flush, sealed surface
Method or record Follow-up log
Acceptance No water at treated cracks over the observation period
Method or record Cores at agreed points, examined
Acceptance Resin fills the crack depth as specified
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Expansion joints and joint systems
Sealants, tapes and profiles: edges, primer, backer rod, fill and continuity.
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Before: surface acceptance
Method or record Measured at intervals and recorded
Acceptance Width within the range the sealant or profile is designed for
Method or record Visual check
Acceptance Firm, clean, dry faces along the whole joint
Method or record Visual check of both faces
Acceptance No residue on either face
During application
Method or record Times recorded per run
Acceptance Both faces primed; sealant placed within the open time
Method or record Depth measured
Acceptance Sealant depth as specified; rod intact and continuous
Method or record Visual check; a random cut-out where specified
Acceptance No voids or bubbles; bonded to the two faces only
Method or record Visual check at ends, laps and junctions
Acceptance No lifted edges; laps and junctions sealed as the system specifies
Method or record Straightedge and visual check
Acceptance Flush with the finish; fixings tight
After: testing and handover
Method or record Barriers and signs; cure time recorded
Acceptance No damage or dirt pick-up before cure
Method or record Visual; adhesion check per the manufacturer where required
Acceptance Sealant bonded along both faces
Method or record Result recorded
Acceptance No leak below the joint over the test period
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Thermal insulation
Boards, sprayed foam and inverted roofs: material, tight joints, thickness and protection.
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Before: surface acceptance
Method or record Delivery notes and labels checked
Acceptance Type, thickness and density match the approved submittal
Method or record The waterproofing stage acceptance checked
Acceptance Waterproofing accepted and the surface clean before boards are laid
Method or record Store visit; storage temperatures logged
Acceptance No damaged boards; foam components within their storage limits
During application
Method or record Visual check
Acceptance No open joints; joints staggered
Method or record Checked against the roof design
Acceptance No loose boards; fleece continuous with the specified overlaps
Method or record Thickness probed per area
Acceptance Total thickness not below the design; even surface, no voids or splits
Method or record Conditions logged before and during spraying
Acceptance Within the product limits; work stops when they are exceeded
After: testing and handover
Method or record Coat and date recorded
Acceptance Foam fully covered within the specified time
Method or record Visual check at edges, upstands and penetrations
Acceptance Continuous insulation; gaps filled as specified
Method or record Visual check before the next trade
Acceptance No crushed or displaced boards
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Concrete repair
Repair mortars: survey, breakout to sound concrete, steel protection, placement and curing.
0 of 13
Before: surface acceptance
Method or record BS EN 14630 for carbonation depth
Acceptance Every repair area marked and recorded on a drawing
Method or record Visual check and tapping; clearance behind the bars measured
Acceptance Sound concrete on every face; corroded bars exposed all round
Method or record Visual check
Acceptance Square edges to the specified depth; no feather edges
Method or record Recorded and photographed
Acceptance Bars free of loose rust; the engineer’s decision recorded where section was lost
During application
Method or record Times recorded per area
Acceptance Bars fully coated; mortar placed within the specified time
Method or record Visual check before placing the mortar
Acceptance Damp with no free water, or the bonding coat still tacky
Method or record Visual during placement
Acceptance Layers within the allowed thickness; no voids or sagging
Method or record Shading planned; conditions logged
Acceptance No rapid drying or plastic cracking
After: testing and handover
Method or record Curing log
Acceptance Cured for the full specified period
Method or record Hammer tapping of every repair
Acceptance No hollow sound; any hollow repair redone
Method or record EN 1542
Acceptance Value not below the specification; failure mode recorded
Method or record See the protective coatings checklist
Acceptance Applied and accepted on its own checklist
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Protective and anti-carbonation coatings
Coatings on concrete and steel: preparation, fairing coat, number of coats, thickness and adhesion.
0 of 9
Before: surface acceptance
Method or record On steel: cleanliness grade to ISO 8501-1
Acceptance Cleanliness and profile as specified, confirmed before priming
Method or record Repair records checked
Acceptance Repairs cured for the specified time
Method or record Measured and logged at the start and during the shift
Acceptance Within the TDS limits throughout the application
During application
Method or record Visual check in raking light
Acceptance Pores and blowholes closed; an even surface
Method or record Gauge readings per coat
Acceptance No reading below the specified wet film; each coat within its recoat window
Method or record Visual check in good light
Acceptance Even colour and gloss; no thin, missed or sagging areas
After: testing and handover
Method or record Readings recorded per area
Acceptance Not below the specified minimum dry-film thickness
Method or record ASTM D4541 on steel · ASTM D7234 on concrete
Acceptance Value not below the specification; failure mode recorded
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Resin flooring and microcement
Epoxy, car-park and microcement floors: slab moisture, mechanical preparation, consumption and cure.
0 of 14
Before: surface acceptance
Method or record ASTM F2170 or the method the system specifies
Acceptance Reading within the system limit before priming
Method or record Profile (CSP) per ICRI 310.2R
Acceptance Laitance removed; profile matches the specified CSP
Method or record Pull-off to ASTM D7234
Acceptance Value not below the specification; failure mode recorded
Method or record Marked on the floor plan
Acceptance Cracks filled; movement joints carried through, not covered
Method or record Logged at the start and during the shift
Acceptance Surface temperature above the dew point by the specified margin
During application
Method or record Watched at mixing; batch and times recorded
Acceptance Full kits mixed mechanically; nothing used past its pot life
Method or record Material used ÷ area
Acceptance Consumption not below the specified rate in every bay
Method or record Visual check against the approved sample
Acceptance Even texture matching the approved sample
Method or record Measured against the approved layout
Acceptance Bays, arrows and colours as approved; clean, straight edges
Method or record Coat log per area; a reference sample panel
Acceptance Finish matches the approved sample panel
After: testing and handover
Method or record Barriers and signs; cure time recorded
Acceptance Opened to foot, then vehicle traffic only after the TDS times
Method or record Visual check
Acceptance Even finish; defects repaired before handover
Method or record Coat log; a water-drop test
Acceptance Even sealer coats; water beads on the surface
Method or record The project quality file
Acceptance Complete, signed and filed for handover
Flood test
Watertightness test of roofs, wet areas and planters before the protection layers: set-up, depth and duration, result.
0 of 12
- Test level
- Temporary dam
- Soffit check below
Before: surface acceptance
Method or record Signed stage acceptance
Acceptance Stage accepted in writing before flooding
Method or record Written confirmation on file
Acceptance Test depth within the confirmed load
Method or record Visual check of each plug
Acceptance Plugs tight; the membrane at the outlet undamaged
Method or record Visual check
Acceptance Dams hold water without damaging the membrane
Method or record Access and lighting arranged
Acceptance The whole soffit can be inspected
During application
Method or record ASTM D5957 is the usual guide
Acceptance Depth and duration as specified
Method or record Level marks and timed readings logged
Acceptance No drop beyond what evaporation explains
Method or record Inspection log with times and photos
Acceptance No drips, damp patches or stains
After: testing and handover
Method or record Signed result
Acceptance Pass signed by the inspector and the client’s representative
Method or record Visual check of the outlets
Acceptance Drains open and running; membrane undamaged
Method or record Photographed before cover
Acceptance Protection in place before any other trade crosses the area
Method or record The project quality file
Acceptance Report signed and filed
References
Test standards and guides named in the checklists; they apply where the project specification calls for them.
- ASTM D4263Indicating moisture in concrete by the plastic-sheet method.
- ASTM F2170Relative humidity in concrete slabs using in-situ probes.
- ASTM D7234Pull-off adhesion of coatings on concrete with portable testers.
- ASTM D4541Pull-off strength of coatings with portable testers, typically on steel.
- ASTM D4787Continuity verification of liquid or sheet linings on concrete.
- ASTM D5957Guide for flood testing horizontal waterproofing installations.
- ASTM D5820Pressurised air-channel evaluation of dual-seamed geomembranes.
- ASTM D5641Geomembrane seam evaluation by vacuum chamber.
- ISO 8501-1Rust and preparation grades of steel surfaces before painting.
- ICRI 310.2RSelecting and specifying concrete surface preparation for coatings and repair.
- BS EN 14630Carbonation depth by the phenolphthalein method.
- EN 1542Bond strength by pull-off for concrete repair products.
- ACI 350.1Tightness testing of concrete containment structures.
General educational content; final values and requirements follow the manufacturer’s TDS and the approved project specification.
Quality on site
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