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Aluminum/vinyl siding is bowed or wavy

Acceptable Performance/Condition

Siding shall be installed to accommodate thermal movement and anticipated shrinkage of the structure to which it is attached. Siding shall be free from bows and waviness when installed in accordance with the manufacturer's specifications. Where local distortion is caused by bowed framing the variation from the specified plane shall not exceed ±20 mm.


One-Year Work and Materials


Bowed or wavy siding exceeding the acceptable condition shall be repaired.


Varying lighting conditions can exaggerate minor variations in siding profile, texture and colour. Minor waviness due to normal sheathing movements is acceptable.


New Home Warranty Program of Saskatchewan
Construction Performance Standards
Effective January 1, 2014