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Move Your Window Headers to the Rim for Better Thermal Performance

Move Your Window Headers to the Rim for Better Thermal Performance class=
Window headers have always been a weak point in the thermal performance of a building shell, and the most common solution is to face the header with rigid foam. Even with a foil-faced polyisocyanurate rigid foam product, such as R-Max, headers typically have less than half the insulation R value of the rest of the wall cavity in a 2X6 wall with blown insulation. Even worse, large window openings frequently have a full depth header that is a substantial source of thermal bridging.… Read More »
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