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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 [...]

Roof Or Flashing Leaks

Article Number




Acceptable Performance/Condition

Roofs and their flashings at intersections shall prevent water penetration and shall be installed in accordance with the Building Code.


One-Year - Ontario Building Code Violations. Two-Year - Building Envelope Water Penetration. · Water leakage resulting from improper maintenance or an act of God is excluded from the statutory warranty. Secondary damage to property or any personal injury resulting from the water penetration is also excluded from the statutory warranty. Water penetration may occur during extreme weather conditions.


Defects allowing water penetration through the roof or any associated flashings shall be repaired.


Ice dams can cause water leakage during the winter. This condition is warranted only if the ice dam results from a demonstrated defect in work or material supplied by the builder. The homeowner must take immediate steps to prevent damage to their property and report any losses to their home insurance provider. See Also: 5.3 LEAKS DUE TO SNOW OR RAIN DRIVEN INTO THE ATTIC THROUGH LOUVRES OR VENTS 13.2 ROOF FLASHING LEAKS AT CHIMNEY