Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
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title: Dampproofing
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### Dampproofing shall be applied only where a groundwater investigation conforming to IBC Section 1803.5.4 confirms that hydrostatic pressure does not act on the structure.
−### The 80% application this standard addresses is a residential or light-commercial basement or crawl-space foundation wall on free-draining soil, with a footing drain, treated with cold-applied asphalt emulsion over poured concrete and a 6 mil polyethylene vapor retarder beneath the slab. {note}
+### The application this standard addresses is a residential or light-commercial basement or crawl-space foundation wall on free-draining soil, with a footing drain, treated with cold-applied asphalt emulsion over poured concrete and a 6 mil polyethylene vapor retarder beneath the slab. {note}
## Dampproofing always works as part of a moisture-management assembly, not in isolation. {note}
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### Where surface-bonding mortar conforming to ASTM C887 is used as the dampproofing material, a separate parge coat is not required because the bonding mortar performs the same function. {note}
−# Application {toc}
+# The coating shall be applied continuously and at the specified rate over the prepared, accepted substrate, and shall be protected from damage until backfill.
−## The coating shall be applied continuously and at the specified rate over the prepared, accepted substrate, and shall be protected from damage until backfill.
+## The dampproofing coating shall be applied continuously over the full treated extent, free of pinholes, holidays, voids, and thin spots.
−### The dampproofing coating shall be applied continuously over the full treated extent, free of pinholes, holidays, voids, and thin spots.
+## The coating shall be applied at not less than the specified rate or film thickness, verified against the manufacturer's published coverage.
−### The coating shall be applied at not less than the specified rate or film thickness, verified against the manufacturer's published coverage.
+## Each coat of a multi-coat system shall cure or set for the manufacturer's published interval before the next coat is applied.
−### Each coat of a multi-coat system shall cure or set for the manufacturer's published interval before the next coat is applied.
+## The coating shall be carried into the footing cove and lapped onto the footing top so the wall-footing transition is continuous.
−### The coating shall be carried into the footing cove and lapped onto the footing top so the wall-footing transition is continuous.
+## Cold-applied emulsion and cementitious coatings shall not be applied when rain, freezing temperatures, or condensation is expected before the coating has cured.
−### Cold-applied emulsion and cementitious coatings shall not be applied when rain, freezing temperatures, or condensation is expected before the coating has cured.
+## Penetrations through the wall below grade shall be sealed and the coating shall be carried tight to each penetration.
−### Penetrations through the wall below grade shall be sealed and the coating shall be carried tight to each penetration.
+# Joints in precast and panelized foundations {toc}
−## Joints in precast and panelized foundations {toc}
+## Joints between precast concrete foundation panels shall be sealed with an elastomeric joint sealant conforming to ASTM C920, Type S or M, Grade NS, Class 25, Use NT, before dampproofing is applied across the joint.
−### Joints between precast concrete foundation panels shall be sealed with an elastomeric joint sealant conforming to ASTM C920, Type S or M, Grade NS, Class 25, Use NT, before dampproofing is applied across the joint.
+## Precast panel joints shall be sealed with an ASTM C920 sealant of the class and use specified.
−### Precast panel joints shall be sealed with an ASTM C920 sealant of the class and use specified.
−
```datasheet
label: Precast panel joint sealant (ASTM C920)
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```
−## Protection of the coating {toc}
+# Protection of the coating {toc}
−### Protection board or a drainage mat shall be installed over the cured coating where the backfill contains aggregate larger than 19 mm (3/4 in.) or where mechanical compaction will occur within about 1.5 m (5 ft) of the wall.
+## Protection board or a drainage mat shall be installed over the cured coating where the backfill contains aggregate larger than 19 mm (3/4 in.) or where mechanical compaction will occur within about 1.5 m (5 ft) of the wall.
−### A dampproofing coating is thin and is easily gouged by angular backfill or torn by a plate compactor working close to the wall. Damage during backfill is one of the leading callback causes for below-grade moisture. A protection course — a rigid protection board, a board of rigid insulation, or a dimpled drainage mat — is installed over the cured coating before backfill to take that abuse. A dimpled drainage mat additionally creates a drainage plane; where a drainage plane is required as part of the moisture-management assembly, coordinate it with [[sync/foundation-drainage]] rather than relying on the protection board alone. {note}
+## A dampproofing coating is thin and is easily gouged by angular backfill or torn by a plate compactor working close to the wall. Damage during backfill is one of the leading callback causes for below-grade moisture. A protection course — a rigid protection board, a board of rigid insulation, or a dimpled drainage mat — is installed over the cured coating before backfill to take that abuse. A dimpled drainage mat additionally creates a drainage plane; where a drainage plane is required as part of the moisture-management assembly, coordinate it with [[sync/foundation-drainage]] rather than relying on the protection board alone. {note}
−### A protection course shall be installed over the cured coating where required by the backfill or compaction conditions.
+## A protection course shall be installed over the cured coating where required by the backfill or compaction conditions.
```datasheet
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```
−### The protection course shall be installed only after the coating has cured sufficiently to resist displacement.
+## The protection course shall be installed only after the coating has cured sufficiently to resist displacement.
−### Backfill shall not be placed until the coating, and the protection course where required, have been inspected and accepted.
+## Backfill shall not be placed until the coating, and the protection course where required, have been inspected and accepted.
# Coordination with Foundation Drainage {toc}
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### A warranty against water intrusion under hydrostatic pressure shall not be implied by this work, because dampproofing is not a pressure-resistant system.