| 9.14.2.1. |
Foundation Wall Drainage
- Unless it can be shown to be unnecessary, the bottom of every exterior foundation wall shall be drained by drainage tile or pipe laid around the exterior of the foundation in conformance with Subsection 9.14.3. or by a layer of gravel or crushed rock in conformance with Subsection 9.14.4.
- Where mineral fibre insulation or crushed rock backfill is provided adjacent to the exterior surface of a foundation wall,
- the insulation or backfill shall extend to the footing level to facilitate the drainage of ground water to the foundation's drainage system (see Note A-9.14.2.1.(2)(a)), and
- any pyritic material in the crushed rock shall be limited to a concentration that will not damage the building to a degree that would adversely affect its stability or the performance of assemblies (see Sentence 9.12.3.3.(2) and Note A-9.4.4.4.(1)).
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