Below-Grade Waterproofing
Cross-references re-pointed to the standard that now owns each subject, after neighboring standards were remade
Showing changes from Rev 8
to Rev 9
in Below-Grade Waterproofing.
---
title: Below-Grade Waterproofing
category: Building Envelope
description: >
When to use: Waterproofing of below-grade walls and slabs that retain earth and enclose interior space, where a groundwater investigation confirms a hydrostatic pressure condition or where the Owner requires waterproofing-level protection regardless of the groundwater finding. Covers the membrane families used below grade (self-adhering modified bituminous sheet, cold fluid-applied elastomeric, hot-applied rubberized asphalt, sodium bentonite geotextile composite, pre-applied bonded sheet, and surface-applied cementitious crystalline coating), positive-side, negative-side, and pre-applied blindside application, substrate preparation and priming, application temperature limits, laps and terminations, detailing at penetrations and joints, the protection course, the drainage layer bearing on the membrane, field watertightness verification, backfill against waterproofed surfaces, and warranties.
− Not intended for: Dampproofing of walls and slabs where the groundwater investigation confirms no hydrostatic condition (see [[sync/dampproofing]]); perimeter drain, sub-slab drainage, sump, and discharge design (see [[sync/foundation-drainage]]); under-slab vapor retarders installed for vapor control without a waterproofing function (see [[sync/vapor-barriers-under-slab]]); plaza deck and parking structure waterproofing over occupied space (see [[sync/membrane-roofing]]); waterproofing of water-containment structures such as tanks, reservoirs, and pools; integral crystalline or hydrophilic admixtures batched into the concrete mix (see [[sync/cast-in-place-concrete]]); waterstops cast into concrete joints (see [[sync/concrete-joints-and-waterstops]]); and the above-grade air and water-resistive barrier plane (see [[sync/air-barriers]]).
+ Not intended for: Dampproofing of walls and slabs where the groundwater investigation confirms no hydrostatic condition (see [[sync/dampproofing]]); perimeter drain, sub-slab drainage, sump, and discharge design (see [[sync/foundation-drainage]]); under-slab vapor retarders installed for vapor control without a waterproofing function (see [[sync/vapor-barriers-under-slab]]); plaza deck and parking structure waterproofing over occupied space (see [[sync/self-adhering-sheet-waterproofing]] and [[sync/fluid-applied-waterproofing]]); waterproofing of water-containment structures such as tanks, reservoirs, and pools; integral crystalline or hydrophilic admixtures batched into the concrete mix (see [[sync/cast-in-place-concrete]]); waterstops cast into concrete joints (see [[sync/concrete-joints-and-waterstops]]); and the above-grade air and water-resistive barrier plane (see [[sync/air-barriers]]).
---
…8 unchanged lines
- Perimeter drain, sub-slab drainage layer, sump, and discharge design, specified in [[sync/foundation-drainage]]
- Under-slab vapor retarders installed for vapor control rather than waterproofing, specified in [[sync/vapor-barriers-under-slab]]
−- Plaza deck and parking structure waterproofing over occupied space, specified in [[sync/membrane-roofing]]
+- Plaza deck and parking structure waterproofing over occupied space, specified in [[sync/self-adhering-sheet-waterproofing]] and [[sync/fluid-applied-waterproofing]]
- Waterproofing of tanks, reservoirs, pools, and other water-containment structures
- Crystalline and hydrophilic waterproofing admixtures batched into the concrete mix, specified in [[sync/cast-in-place-concrete]]
…1021 unchanged lines
## The Contractor shall bear the cost of repairing damage to interior finishes, stored contents, and building systems caused by water entering through a defect covered by the warranty, up to the limits stated in the Contract Documents.