| 9.12.3. |
Backfill |
| 9.12.3.1. |
Placement of Backfill
- Backfill shall be placed to avoid damaging the foundation wall, the drainage tile, externally applied thermal insulation and waterproofing or dampproofing of the wall.
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| 9.12.3.2. |
Grading of Backfill
- Backfill shall be graded to prevent drainage towards the foundation after settling.
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| 9.12.3.3. |
Deleterious Debris and Boulders
- Backfill that is within 600 mm of the foundation shall be free of deleterious debris and boulders larger than 250 mm diam. (See Note A-9.12.3.3.(1).)
- Except as provided in Sentence (3), backfill shall not contain pyritic material or material that is susceptible to ice lensing in concentrations that will damage the building to a degree that would adversely affect its stability or the performance of assemblies. (See Note A-9.4.4.4.(1).)
- Backfill with material of any concentration that is susceptible to ice lensing is permitted where foundation walls are
- cast-in-place concrete,
- concrete block insulated on the exterior, or
- concrete block protected from the backfill by a material that serves as a slip plane. (See Note A-9.4.4.4.(1).)
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