+---
+title: Fluid-Applied Waterproofing
+category: Building Envelope
+toc_depth: 3
+description: >
+ When to use: Seamless, liquid-applied (fluid-applied) membrane waterproofing of horizontal and vertical concrete and masonry surfaces that enclose or protect occupied space, including plaza decks and amenity decks over occupied areas, planters and landscaped areas, split-slab and topping-slab assemblies, parking-structure intermediate and roof levels, mechanical and equipment rooms, wet areas, between-slab and under-topping conditions, and below-grade walls where a monolithic fluid-applied membrane is preferred to sheet. Covers both hot fluid-applied rubberized asphalt (HRA) and cold liquid-applied chemistries (polyurethane, polymethyl methacrylate/PMMA, polyurea, and modified bitumen emulsions), in both buried (separate wearing course, ASTM C836) and exposed traffic-bearing (integral wearing surface, ASTM C957) configurations, together with substrate preparation, primer, reinforcing fabric at joints and transitions, protection course, drainage composite, root barrier for planters, terminations and flashings, dry-film thickness control, flood testing, and warranty.
+ Not intended for: Sheet-membrane below-grade waterproofing and bentonite/pre-applied blindside systems (see [[sync/below-grade-waterproofing]]); low-slope single-ply roof membranes over occupied space (TPO, PVC, EPDM) (see [[sync/membrane-roofing]]); foundation perimeter and sub-slab drainage design without a waterproofing scope (see [[sync/foundation-drainage]]); building expansion-joint and field-molded sealant systems beyond the waterproofing detail (see [[sync/joint-sealants]]); cementitious crystalline waterproofing admixtures integral to concrete (see [[sync/cast-in-place-concrete]]); traffic-bearing deck coatings specified solely for wear and skid resistance without a waterproofing function; water-containment structures such as tanks, reservoirs, fountains, and swimming pools subject to continuous long-term immersion.
+---
+
+# Scope
+
+This standard covers the design basis, materials, substrate preparation, application, protection, and field testing of seamless fluid-applied (liquid-applied) waterproofing membranes installed on horizontal and vertical concrete and masonry surfaces. The work includes the primary membrane, the primer, the reinforcing fabric and detail reinforcement at joints, transitions, and penetrations, the protection course, the drainage composite, the root barrier where planting occurs over the membrane, and the terminations and flashings that close the system at its edges.
+
+A fluid-applied membrane is fundamentally different from a sheet membrane and from a roof membrane, and the distinction governs where this standard applies. A fluid-applied membrane is built up in place from a liquid that cures to a monolithic, fully bonded film with no laps or seams in the field. This seamlessness is its defining advantage: at the re-entrant corners, clustered penetrations, drains, and irregular geometry that concentrate failures in any waterproofing system, a fluid-applied membrane forms a continuous skin that a lapped sheet cannot. Its defining liability is the inverse — because the membrane is built from a liquid, its thickness is established by the applicator in the field rather than by the manufacturer in a factory, and a membrane applied too thin will fail under hydrostatic load even though nothing about it looks wrong. Thickness control is therefore as much a part of this standard as the membrane chemistry itself.
+
+This standard addresses two families of fluid-applied membrane that share an installation logic but differ in chemistry and field method. Hot fluid-applied rubberized asphalt (HRA) is melted in a kettle and applied as a thick, self-healing molten mass that bonds aggressively and bridges cracks well; it is the long-standing choice for plaza decks, split-slabs, and planters over occupied space. Cold liquid-applied membranes — polyurethane, polymethyl methacrylate (PMMA), polyurea, and modified bitumen emulsions — are applied without a kettle, cure chemically, and range from slow-curing single-component products to extremely fast-curing PMMA and polyurea systems used where the deck must be returned to service quickly or where open-flame and hot work are prohibited. The selection between these families is a primary design decision made explicit in this standard.
+
+The membrane is further configured by what bears on top of it. A membrane installed beneath a separate wearing course — a protection slab, a topping, pavers on pedestals, soil, or insulation — does not see traffic directly and is specified to ASTM C836; this is the buried plaza, planter, and split-slab condition. A membrane that is itself the trafficked surface, with an integral wearing surface that takes pedestrian or vehicular wear directly, is specified to ASTM C957; this is the exposed parking deck, ramp, and walking-surface condition. The two conditions impose different performance requirements, and this standard requires the configuration to be established before the membrane chemistry is selected.
+
+Fluid-applied waterproofing is a system, not a coating. A correct membrane applied over an unprepared substrate, without reinforcement at the moving joints, without a protection course before the overburden is placed, or without a root barrier under a planter will fail regardless of the quality of the liquid in the pail. This standard gives proportional weight to substrate preparation, detail reinforcement, and protection because field-failure data consistently locate leaks at those conditions and not in the field of the membrane. Coordinate the waterproofing scope with [[sync/cast-in-place-concrete]] for substrate quality, slope, and cure; with [[sync/foundation-drainage]] for drainage that relieves head on the assembly; with [[sync/joint-sealants]] for the field-molded sealants and expansion-joint systems that interface with the membrane; and differentiate this scope from [[sync/below-grade-waterproofing]] (sheet and bentonite systems) and [[sync/membrane-roofing]] (single-ply roofing over occupied space).
+
+# Referenced Standards
+
+Materials, testing, and installation shall comply with the current adopted edition of the following standards and codes. Where the contract documents, the adopted building code, the membrane manufacturer's published instructions, or a referenced standard conflict, the more stringent requirement shall govern unless the Engineer of Record directs otherwise in writing.
+
+| Standard | Title |
+|----------|-------|
+| ASTM C836/C836M | Standard Specification for High Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane for Use with Separate Wearing Course |
+| ASTM C957/C957M | Standard Specification for High-Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane with Integral Wearing Surface |
+| ASTM C898/C898M | Standard Guide for Use of High Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane with Separate Wearing Course |
+| ASTM C1127/C1127M | Standard Guide for Use of High Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane with an Integral Wearing Surface |
+| ASTM C1305/C1305M | Standard Test Method for Crack Bridging Ability of Liquid-Applied Waterproofing Membrane |
+| ASTM D5295/D5295M | Standard Guide for Preparation of Concrete Surfaces for Adhered (Bonded) Membrane Waterproofing Systems |
+| ASTM D5957 | Standard Guide for Flood Testing Horizontal Waterproofing Installations |
+| ASTM D7832/D7832M | Standard Guide for Performance Attributes of Waterproofing Membranes Applied to Below-Grade Walls / Vertical Surfaces (Enclosing Interior Spaces) |
+| ASTM D6083/D6083M | Standard Specification for Liquid-Applied Acrylic Coating Used in Roofing |
+| ASTM E96/E96M | Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials |
+| ASTM D412 | Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers — Tension |
+| ASTM D624 | Standard Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers |
+| ASTM D5385/D5385M | Standard Test Method for Hydrostatic Pressure Resistance of Waterproofing Membranes |
+| ASTM D7234 | Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers |
+| ICRI 310.2R | Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings, Polymer Overlays, and Concrete Repair |
+| ACI PRC-515.2 | Guide to Selecting Protective Treatments for Concrete |
+| NRCA Waterproofing Manual | Construction Details for Plaza, Split-Slab, and Below-Grade Waterproofing |
+| IBC Chapter 18 / Section 1805 | Dampproofing and Waterproofing (International Building Code) |
+
+# Submittals
+
+## Action Submittals
+
+The Contractor shall submit the following for the Engineer's review and approval before procuring or installing any waterproofing materials. No portion of the waterproofing installation shall proceed until the corresponding submittals have been reviewed and returned.
+
+- Manufacturer's product data for the membrane, primer, reinforcing fabric, detail and flashing materials, protection course, drainage composite, and root barrier, including published application rate, wet-film and dry-film thickness, solids content, cure time, recoat and overcoat windows, service temperature range, and substrate moisture limits
+- Manufacturer's written certification that the membrane, primer, reinforcement, sealants, drainage composite, root barrier, and any insulation in contact with the membrane are mutually compatible and compatible with the concrete or masonry substrate
+- Test reports demonstrating conformance with ASTM C836 (separate wearing course) or ASTM C957 (integral wearing surface) as applicable, and supporting reports for crack-bridging per ASTM C1305, tensile properties per ASTM D412, tear strength per ASTM D624, and water-vapor transmission per ASTM E96, where these are part of the basis of selection
+- A thickness-control plan stating the specified dry-film thickness, the corresponding wet-film thickness and application rate (or kettle pour rate and number of passes for HRA), the number of coats or lifts, and the method and frequency of wet-film and cured-film thickness verification
+- Manufacturer-issued certification that the proposed applicator is approved or licensed to install the specific membrane system on this project
+- Shop drawings and project-specific details for every termination, expansion joint, control joint, construction joint, drain, penetration, curb, planter edge, and horizontal-to-vertical transition, coordinated with the structural and architectural drawings; "see manufacturer's standard details" is not an acceptable substitute for project-specific detail drawings at these conditions
+- A mock-up plan identifying the location, size, and the specific conditions the mock-up will include
+- A flood-test and inspection plan conforming to ASTM D5957, identifying tested areas, water head, duration, structural load verification, and the party performing the test
+- Material safety documentation and, for hot fluid-applied rubberized asphalt, the kettle operation and hot-work safety plan
+- Sample warranty forms (manufacturer system warranty and installer warranty) in the form proposed for execution
+
+```datasheet
+label: Action Submittals Required
+type: checkbox
+options:
+ - "Membrane, primer, reinforcement, and accessory product data"
+ - "Manufacturer compatibility certification for all materials"
+ - "Conformance test reports (ASTM C836 or C957; C1305, D412, D624, E96)"
+ - "Thickness-control plan (wet-film, dry-film, application rate)"
+ - "Manufacturer-approved applicator certification"
+ - "Project-specific termination, joint, drain, and penetration details"
+ - "Mock-up plan"
+ - "Flood-test and inspection plan (ASTM D5957)"
+ - "Hot-work / kettle safety plan (HRA systems)"
+ - "Sample warranty forms"
+default: "Membrane, primer, reinforcement, and accessory product data"
+```
+
+## Samples
+
+The Contractor shall submit physical samples for each fluid-applied system: a cured membrane sample built to the specified dry-film thickness on a representative substrate coupon showing the primer, the reinforcement, the membrane, and any wearing surface; and a sample of the protection course, drainage composite, and root barrier. The cured-membrane sample establishes the color, finish, and built thickness against which field work is judged.
+
+## Closeout Submittals
+
+The Contractor shall provide the following at substantial completion before the waterproofing system is accepted.
+
+- Manufacturer's written system warranty, countersigned by the Contractor, running to the Owner
+- Installer's written warranty for workmanship and watertightness, running to the Owner
+- Flood-test reports per ASTM D5957 and dry-film thickness verification records for all tested and inspected areas, signed by the testing party
+- Documented record of every area repaired after testing or inspection, including the location, the cause, the repair method, and the re-test result
+- As-installed drawings showing the membrane extent, the location of all detail reinforcement, terminations, drains, penetrations, and joints, and any deviation from the approved details
+
+# Quality Assurance
+
+## Applicator Qualification and Manufacturer Approval
+
+Fluid-applied waterproofing shall be installed by an applicator that is currently approved, certified, or licensed by the membrane manufacturer to install the specific system, and that can demonstrate a documented history of completed projects of comparable type, chemistry, and scope. Fluid-applied membranes are unforgiving of application error in a way that sheet systems are not: thickness, primer condition, reinforcement embedment, and recoat timing are all field-controlled and largely concealed once the next material is placed. Manufacturer approval of the applicator is the mechanism by which the manufacturer's system warranty is made available, and it is required regardless of the applicator's general waterproofing experience. For fast-curing PMMA and polyurea systems, the applicator's personnel shall additionally be trained on the catalyzed mixing and timed application those chemistries require.
+
+```datasheet
+label: Applicator Qualification Basis
+type: radio
+options:
+ - "Manufacturer-approved / licensed applicator for the specified system"
+ - "Manufacturer-approved applicator and documented experience on minimum 5 comparable projects"
+default: "Manufacturer-approved / licensed applicator for the specified system"
+```
+
+## Pre-Installation Conference
+
+A pre-installation conference shall be held on-site before any waterproofing work begins, attended by the Owner's Representative or Engineer, the General Contractor, the waterproofing applicator, and the membrane manufacturer's technical representative. The conference shall review substrate acceptance criteria, required concrete age and moisture limits, ambient and surface temperature and dew-point constraints, the sequence of detail reinforcement relative to the field membrane, thickness verification methods, protection-course and overburden timing, the flood-test plan, and responsibility for inspection and repair. Minutes shall be recorded and distributed.
+
+## Mock-Up
+
+The Contractor shall install a field mock-up of the complete fluid-applied system before production work begins, at a location and size accepted by the Engineer and including at minimum one inside corner, one horizontal-to-vertical transition, one drain, one pipe penetration, and one termination. The mock-up establishes the standard of workmanship — thickness, reinforcement embedment, detail execution, and finish — and shall be reviewed and accepted by the Engineer and the manufacturer's technical representative before production application proceeds. An accepted mock-up may remain as part of the work if it is in a location that becomes part of the finished installation.
+
+## Manufacturer Technical Representative
+
+The membrane manufacturer shall provide a technical representative to inspect and accept the prepared substrate before application begins, to observe the first day of production application, and to be available during the work. The representative shall confirm in writing that the substrate condition, the application method, and the environmental conditions on the day of first observation meet the manufacturer's requirements.
+
+## Inspection Before Concealment
+
+The installed membrane shall be available for inspection, thickness verification, and flood testing before it is concealed by protection course, drainage composite, insulation, wearing course, soil, or pavers. The Contractor shall schedule these inspections and tests, and the inspection by the Authority Having Jurisdiction where required, before any concealing work proceeds. Concealing the membrane before testing converts a correctable deficiency into a demolition-and-replacement problem.
+
+# Service Configuration and Design Basis
+
+## Wearing Course Configuration
+
+The single configuration decision that governs membrane selection is whether the membrane is buried beneath a separate wearing course or is itself the exposed trafficked surface. A buried membrane under a protection slab, topping, pavers, soil, or insulation is not exposed to traffic, ultraviolet light, or direct abrasion and is specified to ASTM C836; this is the plaza-deck, planter, split-slab, and between-slab condition. A membrane that is the wearing surface — exposed to pedestrian or vehicular traffic, ultraviolet light, and abrasion — is specified to ASTM C957 and requires the higher tensile, tear, abrasion, and weathering performance that an exposed traffic surface demands. The two specifications are not interchangeable, and selecting a buried-membrane product for an exposed traffic surface, or the reverse, is a fundamental error.
+
+```datasheet
+label: Wearing Course Configuration
+type: radio
+options:
+ - "Separate wearing course — membrane buried beneath protection slab, topping, pavers, soil, or insulation (ASTM C836)"
+ - "Integral wearing surface — membrane is the exposed trafficked surface (ASTM C957)"
+drawing_ref: true
+default: "Separate wearing course — membrane buried beneath protection slab, topping, pavers, soil, or insulation (ASTM C836)"
+```
+
+## Service Condition
+
+The service condition over the membrane drives the protection, drainage, and root-barrier requirements that follow. A plaza deck over occupied space, a planter, a split-slab, a between-slab condition, and an exposed parking deck each impose a different overburden and a different set of detail risks.
+
+```datasheet
+label: Primary Service Condition
+type: select
+options:
+ - "Plaza / amenity deck over occupied space — pavers or topping over membrane"
+ - "Planter / landscaped area over occupied space — soil and vegetation over membrane"
+ - "Split-slab / topping-slab — structural slab, membrane, protection, topping slab"
+ - "Between-slab / under-topping interior condition (mechanical or wet area)"
+ - "Exposed parking deck, ramp, or traffic surface (integral wearing surface)"
+ - "Below-grade wall — fluid-applied membrane preferred to sheet"
+drawing_ref: true
+default: "Plaza / amenity deck over occupied space — pavers or topping over membrane"
+```
+
+## Hydrostatic Condition
+
+Where the membrane will be subject to standing water or hydrostatic head — at a below-grade wall, a planter that retains irrigation water, or a deck where drainage can be impeded — the membrane and the assembly shall be designed for the design head, and the membrane shall demonstrate hydrostatic pressure resistance per ASTM D5385. The Engineer of Record shall establish whether hydrostatic conditions exist; for below-grade walls, this determination shall be based on a geotechnical investigation as required by IBC Section 1805. Relief of head by the drainage layer is part of the design, not a substitute for it.
+
+```datasheet
+label: Hydrostatic Exposure
+type: radio
+options:
+ - "Non-hydrostatic — free-draining assembly, membrane sheds water to drains"
+ - "Intermittently hydrostatic — water may stand on the membrane during storms, irrigation, or seasonal high water"
+ - "Continuously hydrostatic — below-grade wall or condition with standing groundwater (D5385 resistance required)"
+drawing_ref: true
+default: "Non-hydrostatic — free-draining assembly, membrane sheds water to drains"
+```
+
+# Materials
+
+## Membrane Chemistry
+
+The membrane chemistry shall be selected for the service configuration, the cure speed required by the construction schedule, the temperature and ventilation conditions at application, and the project's hot-work restrictions. Each chemistry below is procurable from multiple manufacturers in the configurations described.
+
+Hot fluid-applied rubberized asphalt (HRA) is a blend of asphalt and synthetic rubber and polymers melted in a kettle and applied as a thick, monolithic, self-healing mass, almost always in a buried (ASTM C836) configuration with reinforcing fabric embedded between two heavy passes. It bonds aggressively to properly prepared, dry concrete, bridges cracks well, and is the long-established choice for plaza decks, planters, and split-slabs over occupied space. It requires a kettle, trained personnel, and hot-work controls, and it cannot be applied in wet conditions.
+
+Cold liquid-applied polyurethane is a single- or two-component elastomeric membrane that cures by reaction (with moisture or with a catalyst) to a tough, flexible film with excellent elongation and crack-bridging; it is widely used in both buried (C836) and exposed traffic-bearing (C957) configurations and is the most common cold deck-coating chemistry. Polymethyl methacrylate (PMMA) is a reactive resin that cures extremely fast — typically returning to service within hours — and bonds and reinforces well at complex details and in cold weather; it is used where rapid return to service or fast detail work is required, at a higher material cost. Polyurea is a very fast-setting, spray-applied elastomer used where high build, rapid cure, and high abrasion resistance are needed, typically with specialized plural-component spray equipment. Modified bitumen emulsion is a cold, water-based asphalt-emulsion membrane used primarily in buried, non-traffic, below-grade and split-slab conditions where a lower-cost, low-odor, water-based product is acceptable.
+
+```datasheet
+label: Membrane Chemistry
+type: select
+options:
+ - "Hot fluid-applied rubberized asphalt (HRA) — buried plaza/planter/split-slab (C836)"
+ - "Cold liquid-applied polyurethane — single- or two-component elastomeric"
+ - "Polymethyl methacrylate (PMMA) — fast-cure reactive resin"
+ - "Polyurea — fast-set spray-applied elastomer"
+ - "Modified bitumen emulsion — cold water-based, buried/non-traffic"
+drawing_ref: true
+default: "Hot fluid-applied rubberized asphalt (HRA) — buried plaza/planter/split-slab (C836)"
+```
+
+## Membrane Specification Class
+
+The membrane shall conform to the ASTM specification that matches the wearing-course configuration: ASTM C836 for a separate (buried) wearing course, or ASTM C957 for an integral (exposed) wearing surface. This element records the conformance requirement that the submitted product must meet.
+
+```datasheet
+label: Membrane Conformance Specification
+type: radio
+options:
+ - "ASTM C836 — cold liquid-applied elastomeric, separate wearing course (buried)"
+ - "ASTM C957 — cold liquid-applied elastomeric, integral wearing surface (exposed traffic)"
+ - "Hot fluid-applied rubberized asphalt per manufacturer's published properties (buried; used with C836 design guidance)"
+default: "ASTM C836 — cold liquid-applied elastomeric, separate wearing course (buried)"
+```
+
+## Crack-Bridging Performance
+
+A waterproofing membrane over a concrete deck must remain continuous across the shrinkage and thermal cracks that concrete inevitably develops, and it must do so at the low temperatures at which the membrane is least flexible and the crack is widest. The membrane shall demonstrate crack-bridging ability per ASTM C1305 at the project's lowest expected service temperature. Crack-bridging is the single most important elastomeric property for a deck membrane, because a membrane that loses continuity over a moving crack leaks even though it remains otherwise sound.
+
+```datasheet
+label: Crack-Bridging Verification (ASTM C1305)
+type: radio
+options:
+ - "Required — membrane passes C1305 crack-bridging at lowest expected service temperature"
+ - "Required at standard test temperature only"
+default: "Required — membrane passes C1305 crack-bridging at lowest expected service temperature"
+```
+
+## Primer
+
+A primer compatible with the membrane and the substrate shall be applied where the manufacturer's data requires it, which for most fluid-applied systems over concrete is always. The primer wets and seals the porous concrete surface, binds residual dust, and establishes the adhesion on which the entire bonded system depends. Primer shall be applied at the manufacturer's published rate to a clean, dry, prepared substrate, and the membrane shall be applied within the primer's recoat window. Over-application of primer can leave a weak film that reduces rather than improves adhesion; the application rate shall be verified.
+
+```datasheet
+label: Primer
+type: radio
+options:
+ - "Manufacturer's primer for the specified membrane and substrate (standard)"
+ - "No primer — only where manufacturer's data confirms the system bonds to this substrate without primer"
+default: "Manufacturer's primer for the specified membrane and substrate (standard)"
+```
+
+## Reinforcing Fabric
+
+Reinforcing fabric — a polyester or fiberglass mat embedded in the wet membrane — shall be installed at all moving and high-stress conditions: inside and outside corners, horizontal-to-vertical transitions, construction joints, control joints, around drains, around penetrations, and over cracks wider than the manufacturer's threshold. The fabric distributes movement across a wider zone of the membrane, increases local thickness, and resists the concentrated tearing that occurs at edges and cracks. In hot fluid-applied rubberized asphalt systems, a continuous fabric is embedded between the two membrane passes across the entire field; in cold liquid systems, fabric is used as detail reinforcement at the conditions above and, where specified, as full-coverage reinforcement.
+
+```datasheet
+label: Reinforcing Fabric Extent
+type: radio
+options:
+ - "Detail reinforcement at corners, transitions, joints, drains, penetrations, and cracks (cold liquid, standard)"
+ - "Full-coverage fabric embedded between membrane passes (HRA standard; cold liquid where specified)"
+default: "Detail reinforcement at corners, transitions, joints, drains, penetrations, and cracks (cold liquid, standard)"
+```
+
+## Protection Course
+
+A protection course shall be installed over the cured membrane to protect it from mechanical damage during placement of the overburden, before any wearing course, topping slab, drainage composite, insulation, soil, or pavers is placed. The protection course is mandatory for buried membranes; placing overburden directly on the membrane is a known cause of puncture and is not permitted.
+
+```datasheet
+label: Protection Course Type
+type: radio
+options:
+ - "Semi-rigid asphaltic protection board"
+ - "Extruded polystyrene board (also serves as inverted-roof / protected-membrane insulation)"
+ - "Hot-applied protection layer flood-coated over HRA membrane while warm"
+ - "Heavy polyethylene / fabric protection sheet (light-duty, short-term protection)"
+default: "Semi-rigid asphaltic protection board"
+```
+
+## Drainage Composite
+
+A drainage composite (geocomposite drainage board) shall be installed over the protection course in buried assemblies to carry water to the drains and relieve head on the membrane. A waterproofing membrane that holds standing water is a membrane under sustained hydrostatic load; the drainage layer keeps the membrane drained and is part of the waterproofing system, not an accessory to it. The drainage composite shall have a filter fabric facing the overburden to prevent fines from clogging the core. Coordinate the drainage composite and the deck-drain system with [[sync/foundation-drainage]].
+
+```datasheet
+label: Drainage Composite
+type: radio
+options:
+ - "Required — geocomposite drainage board with filter fabric over protection course (standard for buried decks and planters)"
+ - "Required — high-flow drainage composite for deep planters or high-volume conditions"
+ - "Not required — free-draining granular or pedestal-paver assembly provides drainage path"
+default: "Required — geocomposite drainage board with filter fabric over protection course (standard for buried decks and planters)"
+```
+
+## Root Barrier
+
+Where the membrane is overlain by soil and planting — a planter or a landscaped plaza — a root barrier shall be provided to prevent root penetration of the membrane and the protection course. Roots will exploit any path to water and will, over years, penetrate a membrane that lacks a barrier. The root barrier shall be a dedicated root-resistant sheet or a membrane certified as root-resistant; where the membrane manufacturer certifies the membrane itself as root-resistant, a separate barrier may be omitted only with that written certification.
+
+```datasheet
+label: Root Barrier (planted areas only)
+type: radio
+options:
+ - "Separate root-barrier sheet over the protection course"
+ - "Membrane certified root-resistant by manufacturer — no separate barrier required"
+ - "Not applicable — no planting over membrane"
+default: "Separate root-barrier sheet over the protection course"
+```
+
+# Substrate Preparation
+
+## General Requirements
+
+Substrate preparation is the most cost-effective quality investment in fluid-applied waterproofing, and an inadequately prepared substrate is the most common root cause of adhesion failure. All surfaces to receive membrane shall be structurally sound and free of standing water, frost, ice, oil, grease, curing compounds not compatible with the membrane, form-release agents, laitance, dust, efflorescence, and loose or unsound material before any primer or membrane is applied. Concrete surface preparation shall conform to ASTM D5295 and shall produce the surface profile required by the membrane manufacturer, referenced to ICRI 310.2R. The Contractor shall inspect every portion of the substrate and shall not apply membrane over any area that fails the acceptance criteria.
+
+## Concrete Age, Strength, and Cure
+
+New concrete shall reach the minimum age, strength, and dryness required by the membrane manufacturer before the membrane is applied; a minimum age of 7 days and a minimum compressive strength of 2,000 psi are typical thresholds, but the manufacturer's data governs. Curing compounds shall be of a type the membrane manufacturer accepts, or shall be removed by mechanical preparation; many membrane failures trace to a curing compound that prevented the primer from bonding. Concrete cured under a wet method or in a thick section may require additional drying time.
+
+```datasheet
+label: Concrete Minimum Age Before Membrane
+type: select
+unit: days
+options:
+ - "7 days minimum"
+ - "14 days minimum (wet-cured, thick sections, or cool/humid conditions)"
+ - "28 days minimum (where manufacturer requires full design strength)"
+default: "7 days minimum"
+```
+
+## Surface Profile
+
+The prepared concrete shall present the surface profile the membrane manufacturer requires for bond, achieved by shot blasting, grinding, or other mechanical means per ASTM D5295 and referenced to the ICRI Concrete Surface Profile (CSP) chip scale. A profile that is too smooth provides insufficient mechanical key; a profile that is too aggressive cannot be filled at the specified membrane thickness. Acid etching shall not be used as a substitute for mechanical preparation where the manufacturer requires a mechanical profile.
+
+```datasheet
+label: Concrete Surface Profile (ICRI CSP)
+type: select
+options:
+ - "CSP 3 (light shot blast / grind) — typical for cold liquid membranes"
+ - "CSP 3 to 5 (medium shot blast) — typical for high-build and HRA systems"
+ - "Per manufacturer's published requirement"
+default: "CSP 3 (light shot blast / grind) — typical for cold liquid membranes"
+```
+
+## Surface Moisture
+
+Fluid-applied membranes are highly sensitive to substrate moisture: most chemistries will not bond to, or will blister over, a damp slab, and a slab that looks dry can carry enough internal moisture to drive a blister once the membrane skins over. Substrate moisture shall be within the maximum the membrane manufacturer permits, verified by a documented test method — relative-humidity probe, calcium-chloride test, or a plastic-sheet test per the manufacturer's accepted method — not by visual inspection. Hot fluid-applied rubberized asphalt in particular shall not be applied over a damp substrate, because trapped moisture flashes to steam under the molten material and blows pinholes and blisters in the membrane.
+
+```datasheet
+label: Substrate Moisture Acceptance
+type: radio
+options:
+ - "Dry — within manufacturer's maximum moisture limit, verified by documented test"
+ - "Damp-tolerant primer / membrane confirmed by manufacturer for this substrate condition"
+default: "Dry — within manufacturer's maximum moisture limit, verified by documented test"
+```
+
+## Surface Defect Repair
+
+Form-tie holes, bug holes, honeycomb, spalls, and voids shall be filled with a patching material compatible with the membrane and flush with the surrounding surface before the membrane is applied; the membrane shall not be used to bridge an unrepaired void. Fins, ridges, and projections shall be ground flush. Sharp inside corners and re-entrant angles shall be coved with a fillet of compatible material, and sharp outside corners shall be eased, so the membrane is not required to make an abrupt bend that thins the film and concentrates stress.
+
+```datasheet
+label: Inside Corner / Cove Treatment
+type: radio
+options:
+ - "Coved fillet of manufacturer-compatible patching material at all inside corners"
+ - "Reinforced cove — fabric-reinforced membrane fillet at inside corners and transitions"
+default: "Coved fillet of manufacturer-compatible patching material at all inside corners"
+```
+
+# Environmental and Service Conditions for Application
+
+## Temperature and Dew Point
+
+The membrane and primer shall not be applied when the ambient air temperature or the substrate temperature is below the manufacturer's minimum or above the manufacturer's maximum, and the substrate temperature shall be at least 5°F above the dew point during application and cure to prevent condensation from forming beneath or within the curing film. Cold slows the cure of most cold liquid chemistries and raises their viscosity; heat shortens the working time of catalyzed systems and can cause solvent or moisture to flash before the film levels. PMMA and certain polyurethane systems are formulated for cold-weather application and extend the usable temperature range with manufacturer guidance.
+
+```datasheet
+label: Minimum Application Temperature — Air and Surface
+type: select
+unit: °F
+options:
+ - "40°F (typical minimum for most cold liquid-applied systems)"
+ - "25°F with cold-weather formulation / catalyst (per manufacturer data)"
+ - "50°F (some water-based emulsion systems require higher minimum)"
+default: "40°F (typical minimum for most cold liquid-applied systems)"
+```
+
+```datasheet
+label: Minimum Surface Temperature Above Dew Point
+type: select
+unit: °F
+options:
+ - "5°F above dew point"
+ - "10°F above dew point"
+default: "5°F above dew point"
+```
+
+## Moisture and Weather
+
+Application shall not proceed during rain, snow, fog, or onto a wet or frost-covered substrate, and shall stop when precipitation is imminent before the membrane has reached the manufacturer's rain-resistance cure point. Water-based emulsion systems are especially vulnerable to rain before cure, and an uncured membrane wetted by rain may have to be removed and reapplied. The Contractor shall not apply more membrane in a working period than can reach rain resistance before the next expected weather.
+
+# Application
+
+## Thickness Control
+
+The dry-film thickness is the governing performance variable of a fluid-applied membrane and the variable most often deficient in the field. The Contractor shall apply the membrane to the specified dry-film thickness, established by applying the corresponding wet-film thickness at the manufacturer's application rate and verified during application with a wet-film gauge and after cure by dry-film measurement or by reconciling the quantity of material consumed against the area covered. A membrane applied below the specified thickness — whether by spreading material too thin, by over-rolling, or by applying fewer passes than specified — will not achieve the rated hydrostatic resistance or crack-bridging and shall be brought to thickness with additional material. Thickness cannot be judged by eye.
+
+```datasheet
+label: Membrane Dry-Film Thickness — Buried (Separate Wearing Course, C836)
+type: range
+unit: mils
+options:
+ min: 60
+ max: 215
+ setpoints: [60, 90, 120, 150, 180, 215]
+default: 90
+```
+
+```datasheet
+label: Membrane Dry-Film Thickness — Exposed Traffic (Integral Wearing Surface, C957)
+type: range
+unit: mils
+options:
+ min: 40
+ max: 100
+ setpoints: [40, 50, 60, 75, 90, 100]
+default: 60
+```
+
+```datasheet
+label: Hot Fluid-Applied Rubberized Asphalt — Total Applied Thickness
+type: range
+unit: mils
+options:
+ min: 125
+ max: 250
+ setpoints: [125, 150, 180, 215, 250]
+default: 215
+```
+
+## Number of Coats or Lifts
+
+Cold liquid-applied membranes shall be applied in the number of coats the manufacturer specifies to reach the dry-film thickness, with each coat applied within the recoat window and, where practical, in a direction crossing the previous coat to ensure full coverage and to reveal holidays. Hot fluid-applied rubberized asphalt shall be applied in two passes (lifts) with the reinforcing fabric fully embedded between them, the first lift establishing the bond and embedding the fabric and the second lift building thickness over it.
+
+```datasheet
+label: Number of Membrane Coats / Lifts (minimum)
+type: radio
+options:
+ - "2 coats / lifts (standard)"
+ - "3 coats"
+ - "Single high-build spray pass with verified wet-film thickness (polyurea)"
+default: "2 coats / lifts (standard)"
+```
+
+## Detail Reinforcement Sequence
+
+Detail reinforcement at corners, transitions, joints, drains, and penetrations shall be installed and allowed to cure (or, for HRA, embedded in the first hot pass) before or integrally with the field membrane, so that the highest-stress conditions receive the reinforcement and the extra thickness they require. Reinforcing fabric shall be fully embedded in the wet membrane with no dry spots, wrinkles, fish-mouths, or unsaturated edges; an unsaturated or bridged fabric is a defect that shall be cut out and re-made. The field membrane shall lap onto and fully bond to the cured detail reinforcement.
+
+## Reinforcement at Cracks
+
+Existing cracks in the substrate wider than the manufacturer's threshold (commonly on the order of 1/16 in.) shall be detailed before the field membrane is applied. Static cracks shall be routed and filled and covered with a fabric-reinforced membrane stripe; moving cracks and joints shall receive a bond-breaker or backer over the crack beneath a reinforced membrane band so that the membrane can stretch across the moving crack without tearing at a hard-bonded edge. A membrane bonded tightly across a moving crack with no bond-breaker will split at the crack on the first thermal cycle.
+
+```datasheet
+label: Moving Crack / Non-Working Joint Treatment
+type: radio
+options:
+ - "Bond-breaker tape or backer over the crack beneath a fabric-reinforced membrane band"
+ - "Route, fill with compatible sealant, then fabric-reinforced membrane band"
+default: "Bond-breaker tape or backer over the crack beneath a fabric-reinforced membrane band"
+```
+
+## Terminations
+
+The membrane shall be terminated at its upper and outer edges so that water cannot enter behind it. Vertical terminations shall be carried to the height the design requires and shall be mechanically secured with a termination bar and sealed at the top edge, or terminated into a reglet or saw cut and sealed, so that the edge cannot peel back. At a buried plaza or deck, the membrane shall be turned up at all walls, curbs, and upstands a minimum height above the finished wearing surface or drainage course so that water cannot bypass the upturn. A membrane edge left simply feathered or folded over without a sealed, secured termination is a common entry point and is not acceptable.
+
+```datasheet
+label: Membrane Upturn Height at Walls, Curbs, and Upstands (minimum above finished surface)
+type: select
+unit: in
+options:
+ - "4 in"
+ - "6 in"
+ - "8 in"
+drawing_ref: true
+default: "6 in"
+```
+
+```datasheet
+label: Vertical Termination Method
+type: radio
+options:
+ - "Termination bar — continuous, mechanically fastened, sealed at top edge"
+ - "Reglet or saw-cut termination — membrane embedded and wedge-sealed"
+ - "Counter-flashing reglet — membrane lapped behind metal counter-flashing"
+default: "Termination bar — continuous, mechanically fastened, sealed at top edge"
+```
+
+## Drains and Penetrations
+
+Every drain and penetration is a discontinuity in the membrane and a concentration point for leaks, and each shall be detailed on the drawings and reinforced. The membrane shall be carried into the drain bowl and clamped beneath the drain's clamping ring or flashing flange so that the seal is made within the drain, not at its rim; deck drains shall be of a flashing-flange or clamping-ring type compatible with a fluid-applied membrane. At pipe and conduit penetrations, the membrane shall be reinforced with fabric and dressed up the penetration, and the annulus shall be sealed with a compatible sealant; where the penetration moves relative to the structure, the seal shall be a flexible detail that accommodates the movement. Penetrations shall be grouped and minimized where the design allows, and clustered penetrations too tight to flash individually shall be resolved on the drawings before work begins.
+
+```datasheet
+label: Deck Drain Type
+type: radio
+options:
+ - "Clamping-ring drain — membrane clamped between drain body and ring"
+ - "Flashing-flange drain — membrane bonded and reinforced onto integral flange"
+ - "Two-stage / sub-drain at membrane level with upper drain at wearing surface (split-slab plaza)"
+drawing_ref: true
+default: "Clamping-ring drain — membrane clamped between drain body and ring"
+```
+
+## Expansion and Construction Joints
+
+Expansion joints and construction joints in the structure shall be carried through the waterproofing as designed, not bridged blindly by the membrane. Expansion joints shall receive a manufacturer's expansion-joint detail — a bellows or pre-formed joint cover bonded on both sides and free to move at the joint — coordinated with the building expansion-joint system and with [[sync/joint-sealants]]. The membrane shall be reinforced and detailed at every construction joint. The design movement at each expansion joint shall be established by the Engineer and conveyed to the applicator so the correct detail geometry is used.
+
+# Protection and Drainage
+
+## Protection Course Installation
+
+The protection course shall be installed over the cured membrane as soon as the membrane has reached the manufacturer's cure point and has passed inspection and flood testing, and before any other trade works over the membrane or any overburden is placed. Protection-board joints shall be butted and, where specified, staggered from membrane detail seams. Fasteners that would penetrate the membrane shall not be used to secure the protection course; the board shall be adhered, loose-laid under ballast, or held by the overburden as the assembly allows. Where the assembly is a protected-membrane (inverted) configuration, the insulation that serves as protection shall be installed per [[sync/membrane-roofing]] coordination for above-membrane insulation where applicable.
+
+## Drainage and Root Barrier Installation
+
+The drainage composite shall be installed over the protection course with the filter fabric facing the overburden and shall be carried to and lapped into the drains so that water reaches the drainage path and is not trapped against the membrane. In planted areas, the root barrier shall be installed continuously, with laps and upturns at planter walls per the manufacturer's instructions, before soil is placed. The drainage and drain system shall be coordinated with [[sync/foundation-drainage]].
+
+# Testing and Inspection
+
+## Flood Test
+
+All horizontal fluid-applied waterproofing — plaza decks, planters, split-slabs, and between-slab areas — shall be flood tested in accordance with ASTM D5957 before the protection course or any overburden is placed. The membrane shall be flooded with water to a head not exceeding 2 in. above the high point (and not exceeding the structural load capacity or the upturn height), held for the test duration, and observed for leakage at the underside and at all terminations and penetrations. No flood test shall be performed within the first 24 hours after membrane installation (48 hours where installed below 50°F), so the membrane has cured. The Contractor shall confirm the structure can carry the dead load of the test water, shall dam all edges, and shall plug drains for the test. Any leak shall be located, the membrane repaired, and the area re-tested until it holds.
+
+```datasheet
+label: Flood Test — Water Head (maximum)
+type: select
+unit: in
+options:
+ - "1 in"
+ - "2 in"
+default: "2 in"
+```
+
+```datasheet
+label: Flood Test — Minimum Duration
+type: range
+unit: hours
+options:
+ min: 24
+ max: 72
+ setpoints: [24, 48, 72]
+default: 24
+```
+
+## Adhesion Testing
+
+Where adhesion to the substrate is critical — exposed traffic membranes and any membrane over a questionable or repaired substrate — pull-off adhesion of the cured membrane shall be verified per ASTM D7234 at the frequency stated in the test plan, and shall meet or exceed the manufacturer's minimum bond strength. Adhesion testing confirms that the substrate preparation and primer produced the bond the system depends on, which a flood test alone does not demonstrate.
+
+```datasheet
+label: Pull-Off Adhesion Testing (ASTM D7234)
+type: radio
+options:
+ - "Required for exposed traffic (C957) membranes and over repaired or questionable substrate"
+ - "Required at stated frequency for all horizontal membrane areas"
+ - "Not required — flood test is the primary acceptance test for this buried application"
+default: "Required for exposed traffic (C957) membranes and over repaired or questionable substrate"
+```
+
+## Thickness Verification
+
+Dry-film thickness shall be verified across the work at the frequency stated in the thickness-control plan, by wet-film gauge readings recorded during application and by cured-film measurement or material-consumption reconciliation after cure. Areas found below the specified thickness shall be brought to thickness with additional membrane applied within the manufacturer's recoat window or over a re-primed surface. Thickness records shall be included in the closeout submittals.
+
+```datasheet
+label: Thickness Verification Method
+type: checkbox
+options:
+ - "Wet-film gauge readings recorded during application"
+ - "Cured dry-film measurement (gauge or coupon)"
+ - "Material-consumption reconciliation against area covered"
+default: "Wet-film gauge readings recorded during application"
+```
+
+## Visual Inspection
+
+A continuous visual inspection shall be performed over the entire membrane by the applicator's foreman and the manufacturer's technical representative, confirming continuity, full fabric embedment with no fish-mouths or dry spots, absence of pinholes, blisters, and holidays, specified thickness at corners and details, correct termination and upturn heights, and correct drain and penetration treatment. Every deficiency shall be repaired before flood testing and before the membrane is concealed.
+
+## Test Reports
+
+Flood-test, adhesion, and thickness results shall be recorded on signed reports stating the method, date, ambient and surface temperature, the area covered, the head and duration (flood test), the instrument and calibration (adhesion), a map of any leaks or deficiencies keyed to the as-installed drawing, the repair method for each, and the pass result of each re-test. Reports shall be included in the closeout submittals.
+
+# Installation Sequencing
+
+The waterproofing work shall be sequenced so that each step is complete and verified before the next conceals it. The correct sequence is: prepare and accept the substrate; repair defects and cove corners; prime; install detail reinforcement at corners, transitions, joints, drains, and penetrations; apply the field membrane to the specified thickness in the specified passes; cure; inspect and verify thickness; flood test and adhesion test; repair and re-test; install the protection course; install the drainage composite and root barrier; place the wearing course, topping slab, soil, or pavers. Placing the protection course or overburden before flood testing is the most damaging sequencing error in fluid-applied waterproofing, because it makes a correctable breach unreachable without removing the overburden. The Contractor shall not allow other trades to work on or store materials on the unprotected membrane.
+
+# Delivery, Storage, and Handling
+
+## Storage Conditions and Shelf Life
+
+Materials shall be delivered in the manufacturer's original sealed containers with labels and lot numbers intact and shall be stored within the temperature range and out of the weather and direct sunlight as the manufacturer requires. Reactive cold liquid materials — polyurethane, PMMA, polyurea, and their catalysts — have a limited shelf life and lose cure performance past their expiration date; materials past their shelf life shall not be used. Catalysts, primers, and solvents shall be stored separately from sources of ignition. Water-based emulsion materials shall be protected from freezing, which can ruin the emulsion irreversibly.
+
+```datasheet
+label: Material Shelf-Life Control
+type: radio
+options:
+ - "Use within manufacturer's stated shelf life; reject expired material"
+ - "Use within shelf life and re-test material stored beyond a stated interval per manufacturer guidance"
+default: "Use within manufacturer's stated shelf life; reject expired material"
+```
+
+## Hot Fluid-Applied Kettle Safety
+
+Hot fluid-applied rubberized asphalt is melted in a kettle at temperatures above roughly 350°F and presents burn, fire, and fume hazards that require specific controls. The kettle shall be operated only by trained personnel; it shall be located on a stable, non-combustible base, away from building air intakes, exits, and combustible storage, and attended at all times while operating. The material shall not be overheated past the manufacturer's maximum application temperature, which degrades the rubber and produces excessive fumes. A fire extinguisher rated for the hazard shall be at the kettle, personnel shall wear heat-protective gloves, face protection, and clothing, and the hot-work shall comply with the project's hot-work permit program. The kettle and hot-transfer route shall be planned and approved before HRA work begins.
+
+```datasheet
+label: Hot-Work Controls for HRA Application
+type: checkbox
+options:
+ - "Trained kettle operator; kettle attended while operating"
+ - "Kettle on stable non-combustible base, clear of intakes, exits, and combustibles"
+ - "Material held below manufacturer's maximum application temperature"
+ - "Fire extinguisher rated for the hazard at the kettle"
+ - "Personal protective equipment for hot-asphalt handling"
+ - "Project hot-work permit in effect"
+default: "Trained kettle operator; kettle attended while operating"
+```
+
+# Warranty
+
+## Manufacturer System Warranty
+
+The membrane manufacturer shall provide a written system warranty to the Owner against defects in the waterproofing materials, for a minimum period from the date of substantial completion as stated below. Where the manufacturer offers a system (labor-and-materials) warranty contingent on installation by an approved applicator and on the manufacturer's inspection, that warranty shall be obtained; the system warranty is the reason applicator approval and manufacturer inspection are required by this standard. The warranty shall identify the membrane system, the configuration (buried or exposed), the application areas, and the warranted scope as documented by the test reports and as-installed drawings.
+
+```datasheet
+label: Manufacturer System Warranty Period (minimum)
+type: select
+unit: years
+options:
+ - "5 years"
+ - "10 years"
+ - "15 years"
+ - "20 years"
+default: "10 years"
+```
+
+## Installer Warranty
+
+The waterproofing applicator shall provide a written warranty to the Owner against defects in workmanship and against water infiltration through the installed system for a minimum period from the date of substantial completion as stated below. The installer's warranty shall be in addition to, not in lieu of, the manufacturer's system warranty.
+
+```datasheet
+label: Installer Workmanship Warranty Period (minimum)
+type: select
+unit: years
+options:
+ - "1 year"
+ - "2 years"
+ - "5 years"
+default: "2 years"
+```
+
+## Exclusions
+
+Warranty exclusions shall not relieve the Contractor of responsibility for failures caused by installation methods, substrate preparation, or material handling that deviate from the approved submittals and this standard. Exclusions for structural failure of the building, damage by subsequent construction or other trades after the membrane was protected and accepted, and alterations to the assembly by others are customary and acceptable. The Contractor shall review proposed exclusion language with the Owner before execution.
+
+# Maintenance
+
+The Owner shall be provided with maintenance data describing the installed system, the locations of all terminations, drains, joints, and penetrations, and the recommended inspection interval. Deck drains, planter drains, and overflow paths shall be kept clear; a blocked drain converts a free-draining deck into a membrane under sustained hydrostatic load and is the most common cause of distress in an otherwise sound installation. Exposed traffic membranes shall be inspected periodically for wear, loss of skid resistance, and damage, and shall be recoated within the manufacturer's maintenance schedule before the membrane is worn through. Any future penetration of the membrane for new work shall be made and re-flashed by an applicator qualified for the installed system, and the repaired area shall be re-tested.