PERFORMANCE GUIDELINES: 5. ROOFS

5.16 Standing Water on a Flat Roof

Acceptable Performance/Condition

Unless otherwise designed, flat roofs shall be constructed to drain water. Flat roofs typically are slow to drain and should be constructed to accommodate some standing water. Some areas of standing water after rainfall are normal. Roof shall be designed and constructed in accordance with the Building Code.

Water greater than 6 mm (1/4”) in depth should not remain for more than 48 hours after rainfall has stopped and conditions of evaporation exist. Some retained water at drain edges, seams, transitions or flashing is not uncommon and is not covered under warranty. Standing water on roofs designed for water retention is acceptable.

Warranty Coverage

• 12 months In-Home
• 15 months Common Property
• 5 years Unintended Water Penetration

Damage resulting from maintenance not conducted by the owner in keeping with maintenance documentation provided to the owner by the warranty provider or builder, or from additions, deletions or alterations made by the owner is not covered under warranty.

Damage to personal property is not covered under warranty.

Claim Response

Conditions not meeting the Acceptable Performance/Condition must be rectified. Where repairs are required, colour, finish or texture may not have an exact match. Seasonal conditions may delay the timing of repairs.

Maintenance Tip

Flat roofs should be inspected by a professional every two years and all recommended maintenance should be completed.