Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Fluid-Applied Roofing and Coatings
…40 unchanged lines
## New construction installs the coating system over a prepared deck, rigid insulation, or fresh SPF, where the substrate is known and clean; the two share the coating chemistry and detailing rules but diverge sharply in preparation and submittal requirements. {note}
+## The project type shall be specified, since new construction and restoration work diverge in substrate preparation and submittal requirements though they share coating chemistry.
+
```datasheet
label: Project type
…86 unchanged lines
- Post-cure dry-film-thickness record
- Executed system warranty
−default: [Daily application log (temperature, coverage, wet mils), Post-cure dry-film-thickness record, Executed system warranty]
+default:
+ - "Daily application log (temperature, coverage, wet mils)"
+ - "Post-cure dry-film-thickness record"
+ - "Executed system warranty"
```
…4 unchanged lines
## Mixing components across manufacturers voids the warranty. {note}
−## For a No Dollar Limit (NDL) system warranty, the applicator shall be a contractor currently approved in writing by the coating manufacturer. {note}
+## For a No Dollar Limit (NDL) system warranty, the applicator shall be a contractor currently approved in writing by the coating manufacturer.
## NDL warranties cover both material and labor with no cap on the manufacturer's repair obligation, which is why manufacturers restrict them to trained, audited applicators; a material-only warranty has no applicator-approval requirement but offers far less protection. {note}
…43 unchanged lines
## Slope deficiencies are corrected with tapered fill or crickets shown on the drawings, before the coating scope begins. {note}
+## The warranty type for the fluid-applied roofing system shall be specified as a manufacturer material warranty, a system warranty, or a No Dollar Limit system warranty.
+
```datasheet
label: Warranty type
…6 unchanged lines
```
+## The required term of the fluid-applied roofing system warranty shall be specified, consistent with the warranty type selected.
+
```datasheet
label: System warranty term
…15 unchanged lines
## Coating chemistry shall be matched to the roof's documented ponding behavior; acrylic shall not be specified where water ponds for more than 48 hours.
−## The coating system shall be selected and applied within its published ambient and substrate temperature limits.
−
−## The coating system shall not be applied when frost or precipitation is forecast within the manufacturer's stated cure window.
−
−## Acrylic films will not coalesce below roughly 40°F (4°C) or if dew or frost forms before the surface skins, producing cracking and delamination; solvent-borne silicones tolerate lower temperatures (some to 35°F / 2°C) but still require a dry, frost-free substrate. {note}
−
```datasheet
label: Documented ponding condition
…6 unchanged lines
```
+## The coating system shall be selected and applied within its published ambient and substrate temperature limits.
+
```datasheet
label: Minimum application temperature (ambient and substrate, rising)
…6 unchanged lines
```
+## The coating system shall not be applied when frost or precipitation is forecast within the manufacturer's stated cure window.
+
+## Acrylic films will not coalesce below roughly 40°F (4°C) or if dew or frost forms before the surface skins, producing cracking and delamination; solvent-borne silicones tolerate lower temperatures (some to 35°F / 2°C) but still require a dry, frost-free substrate. {note}
+
## Cool-Roof Compliance {toc}
…130 unchanged lines
## Where coating is applied over an existing single-ply or warranted membrane, the Contractor shall obtain the existing-membrane manufacturer's written approval to overcoat before work begins.
−## Overcoating a still-warranted membrane without that approval voids the original warranty, leaving the owner with neither the old protection nor a clean transfer to the new coating warranty — a design-phase coordination item, not a field discovery. {note}
−
```datasheet
label: Existing substrate (restoration) / deck (new)
…12 unchanged lines
```
+## Overcoating a still-warranted membrane without that approval voids the original warranty, leaving the owner with neither the old protection nor a clean transfer to the new coating warranty — a design-phase coordination item, not a field discovery. {note}
+
## Reinforcing fabric shall be applied at every seam, lap, flashing, penetration, and drain, regardless of coating chemistry.
…34 unchanged lines
## The installed system shall achieve the specified minimum dry-film thickness across the entire roof, confirmed by post-cure dry-mil readings.
−## Coverage shall be controlled in the field with a wet-mil gauge on each coat so that the cured film reaches the specified DFT, with the wet-mil target set for the product's solids content.
−
−## Because acrylic is about 60% solids, roughly 34 wet mils yields about 20 dry mils; because silicone is 90%-plus solids, roughly 22 wet mils yields the same 20 dry mils. {note}
−
−## The crew confirms wet mils as it applies each coat and the inspector confirms dry mils after cure; both checks are required. {note}
−
```datasheet
label: Specified minimum dry-film thickness
…6 unchanged lines
```
+## Coverage shall be controlled in the field with a wet-mil gauge on each coat so that the cured film reaches the specified DFT, with the wet-mil target set for the product's solids content.
+
+## Because acrylic is about 60% solids, roughly 34 wet mils yields about 20 dry mils; because silicone is 90%-plus solids, roughly 22 wet mils yields the same 20 dry mils. {note}
+
+## The crew confirms wet mils as it applies each coat and the inspector confirms dry mils after cure; both checks are required. {note}
+
+## The number of field coats shall be specified, sized to achieve the specified minimum dry-film thickness confirmed by post-cure dry-mil readings.
+
```datasheet
label: Number of field coats (excluding primer)
…54 unchanged lines
```
−## Application {toc}
+## Coatings shall be applied by spray, roller, or squeegee as required by the product, at uniform thickness, without holidays, pinholes, or dry spray, and within the product's recoat window between coats.
−### Coatings shall be applied by spray, roller, or squeegee as required by the product, at uniform thickness, without holidays, pinholes, or dry spray, and within the product's recoat window between coats.
−
−### Airless spray gives the most uniform film and the fastest production on open field area, while roller and brush are used at edges, penetrations, and detail work; the applicator must match method to the product's requirements and observe the minimum and maximum recoat times so coats bond. {note}
−
−### Each coat shall be allowed to cure per the manufacturer's instructions before the succeeding coat is applied.
−
−### Flashings, penetrations, curbs, and drains shall be detailed with reinforcing fabric and additional coating thickness before or in conjunction with the field application.
−
−### Coating shall be terminated at edges, drains, and penetrations as detailed, and shall not be applied over expansion joints, which shall be flashed separately.
−
−### Expansion joints accommodate building movement that a continuous coating film cannot, so they are detailed as separate flashed assemblies rather than coated through. {note}
−
```datasheet
label: Primary application method
…6 unchanged lines
```
+## Airless spray gives the most uniform film and the fastest production on open field area, while roller and brush are used at edges, penetrations, and detail work; the applicator must match method to the product's requirements and observe the minimum and maximum recoat times so coats bond. {note}
+
+## Each coat shall be allowed to cure per the manufacturer's instructions before the succeeding coat is applied.
+
+## Flashings, penetrations, curbs, and drains shall be detailed with reinforcing fabric and additional coating thickness before or in conjunction with the field application.
+
+## Coating shall be terminated at edges, drains, and penetrations as detailed, and shall not be applied over expansion joints, which shall be flashed separately.
+
+## Expansion joints accommodate building movement that a continuous coating film cannot, so they are detailed as separate flashed assemblies rather than coated through. {note}
+
# Testing {toc}
…42 unchanged lines
## The Contractor shall furnish to the Owner a quantity of the field top coat and reinforcing fabric, in the original containers, sufficient for future maintenance touch-up of penetrations and minor repairs.
−## A recoat performed years later must use a compatible product, so turning over sealed top-coat and fabric from the original batch gives the maintenance crew a chemistry-matched starting point — most important for silicone systems, where only silicone bonds to silicone. {note}
+## A recoat performed years later must use a compatible product, so turning over sealed top-coat and fabric from the original batch gives the maintenance crew a chemistry-matched starting point — most important for silicone systems, where only silicone bonds to silicone.
```datasheet
…6 unchanged lines
default: 5
```