Ice dam only occur in climates where snow accumulates on roofs.There are most common on the lower edge on roofs,around chimneys and near party walls . The ice dam is caused by heat escaping from the house ,and melting the snow on the upper parts on the roof .This melted snow re-freezes when it gets down to the colder eave area where there is no heat lost.
Ice dam allow leakage trough the roof into the soffit ,fascia and wall systems.leakage may also develop at the interior of the building ,although if it does not, the damage can be concealed and go unnoticed for considerable period .
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Monday, January 9, 2012
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