Ice dams are formed by continual thawing and refreezing of melting snow. Large masses of ice develop as snow on the upper part of the roof melts. The water runs under the snow and refreezes at the edge of the roof. Additional snow melts and forms pools against the dam, gradually causing water to back up on the roof where it often gets under the shingles and eventually into the house. Causes other than heat escaping from the home include:
The latent damage from ice dams may not be immediately evident. For example, insulation could be getting wet and over time will lose its ability to perform properly. In addition, mold may begin to grow in the moist attic environment. Although ice dams are more prevalent at the eaves, they can and do occur anywhere on the roof, especially where there is a change in roof surface temperatures.
Canadian winter weather is challenging to say the least and, as we all know, there is only so much you can do to avoid its impact. But, having said that, there are some things you can do to minimize the risks of developing ice dams on your roof.
Ask your roofing professional for advice on moisture control membranes such as WinterGuard™ Waterproofing Shingle Underlayment or StormGuard™ Film-Surfaced Leak Barrier/Water & Ice Shield to help prevent moisture damage from winter ice dams.
Contact us for a free detailed quotation and professional evaluation and one of our representatives will be happy to show you how your family can truly benefit from a WinDoor retrofit installation. You will appreciate our positive attitude, our competitive pricing and the quality of our work.