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    Construction Performance Guidelines

About the Guidelines

These helpful guidelines outline work and material deficiencies in new homes and residential condominium units covered under the statutory warranty [...]

Leakage Through Buried Roof Slab - Not Exposed To Chlorides

Article Number

1.2

Condition

LEAKAGE THROUGH BURIED ROOF SLAB – NOT EXPOSED TO CHLORIDES

Acceptable Performance/Condition

Buried roof slabs shall be designed and constructed to prevent water penetration and leakage in accordance with the Ontario Building Code and the design.

Warranty

One-Year – Work and Materials. Two-Year - Building Envelope Water Penetration

Action

The waterproofing system, not meeting acceptable performance, shall be repaired.

Remarks

Repair shall prevent water from penetrating into the building Care must be taken to prevent damage to waterproof membrane during required maintenance activities to exposed surface above the buried roof. The Ontario Building Code references CSA S413, Item 4 which requires protection against leakage. Expansion joints shall be repaired to accommodate movement Exposed to chlorides refers to slabs which are exposed to de-icing chemicals. This typically applies to slabs located below driveways, parking, and walkways. Slabs located below sod or gardens would be considered “not exposed to chlorides”.

  

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