Roofs
5.11
Asphalt Shingle Edges Are Curled Or Cupped
Acceptable Performance/Condition
Asphalt shingle edges and corners need not be completely flat. Edges and corners
that curl or cup to expose the uncoloured portion of the shingle below are not
acceptable.
Warranty
One-Year Work and Materials
Damage resulting from normal wear and tear is not covered by the warranty.
Action
Shingles not meeting the acceptable condition shall be repaired.
Remarks
Adequate attic ventilation is necessary to prevent excessive solar heat buildup
in the attic that can contribute to curling and cupping.