11.02.2009

Preventing Ice Dams



Ice Dams

In the winter, look for icicles hanging down or ice in the gutters indicating the presence of an ice dam. The illustration at right from henryshousework.com shows how an ice dam can create a leak. They are caused by a lack of or too little insulation and/or ventilation in the attic. Warm air escapes into the attic and rises to the peak where it melts the snow on the uppermost part of the roof. The melted snow runs down the roof toward the gutter and refreezes as it comes into contact with the cooler roof near the gutters. By increasing the insulation in the attic and/or increasing the ventilation you can prevent warm air in your house from escaping into the attic. The snow on the roof will stay nice and cold and you will be a lot more comfy.

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