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Comparing polyiso R-values

Abstract
Because polyisocyanurate insulation manufacturers recently changed how they determine and report thermal resistance properties for their products, there now is an additional set of R-values being associated with these insulation products. In this months column, the author attempts to explain and clarify the situation.
Date
4/2003
Author(s)
Mark Graham
Page(s)
61
Keyword(s)
polyiso insulation; R value; thermal resistance



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