Thermal bridging with spray foam insulation
If you have 2x12 rafters and are installing approximately 5 inches of foam do you need to encase the rafters in foam to prevent heat loss through the top of the 1 1/2" of rafter? Or is the heat loss so insignificant that totally encasing the rafter in foam would prove to be unnecessary?
Posted Tue, 05/04/2010 - 17:14
Edited Wed, 05/05/2010 - 05:26
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