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Abstract
Ice dams are a common roof performance problem in buildings that experience snowfall and at least a month of below freezing temperatures. The combination of sufficient roof pitch, adequate insulation just above the exterior wall, and air sealing at the wall-roof transition are all essential to prevent ice dams. But ice dams can occur even in properly detailed roof assemblies from differential solar snow melt. This article outlines both the causes and solutions to ice dam problems.
Ice dams are a common roof performance problem in buildings that experience snowfall and at least a month of below freezing temperatures. The combination of sufficient roof pitch, adequate insulation just above the exterior wall, and air sealing at the wall-roof transition are all essential to prevent ice dams. But ice dams can occur even in properly detailed roof assemblies from differential solar snow melt. This article outlines both the causes and solutions to ice dam problems.
Date
10/2006
10/2006
Author(s)
John Straube
John Straube
Page(s)
Source
Building Science Corporation
Building Science Corporation
Keyword(s)
ice dam
ice dam