| 5.7.3. |
Protection against Ground Water |
| 5.7.3.1. |
Application
- This Subsection applies to the protection of building assemblies that separate interior space from the ground.
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| 5.7.3.2. |
Required Protection
- Except as provided in Sentence (2) and Article 5.7.3.4., building assemblies described in Article 5.7.3.1. shall be protected by waterproofing in accordance with Article 5.7.3.3. so as to prevent the ingress of water into the building or the accumulation of water against the building.
- Waterproofing is not required where it can be shown that
- a building is designed to accommodate the ingress or accumulation of water, or
- the ingress or accumulation of water will not negatively affect
- the health or safety of building users,
- the intended use of the building, or
- the operation of building services.
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| 5.7.3.3. |
Waterproofing
- Waterproofing materials, components, assemblies, or systems installed to provide the required protection shall form a continuous and impervious barrier to the ingress of water and be capable of accommodating
- imperfections, construction joints, control joints and expansion joints (see Note A-5.7.3.3.(1)(a)),
- junctions between different building assemblies, and
- elements penetrating building assemblies.
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| 5.7.3.4. |
Where Dampproofing is Permitted
- Vertical building assemblies that separate interior space from the ground are permitted to be dampproofed where
- such assemblies are not subjected to hydrostatic pressure,
- the substrate is cast-in-place concrete, and
- a drainage layer is installed between the building assembly and the soil. (See Note A-5.7.3.4.(1).)
- Joints, junctions and penetrations shall be designed and constructed to maintain the continuity of the dampproofing.
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