For the first time in over 19 years, ASHRAE (The American Society of Heating, Refrigerating and Air-Conditioning Engineers) recently announced an increase to the minimum required prescriptive R-value ...
For the first time in nearly two decades, ASHRAE has increased the minimum required prescriptive R-value (resistance to heat flow) in ASHRAE Standard 90.1 to R-20 for above-deck roof insulation, from ...
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