A question frequently asked regarding roof systems incorporating
tapered insulation is what minimum insulation thickness should be
used to comply with the applicable energy code's minimum thermal
insulation requirements.
Energy codes regulate the efficient use of energy in buildings
and provide minimum thermal insulation requirements for building
envelopes. For roof assemblies using tapered insulation, roofing
professionals often are unclear how to represent tapered insulation
R-values.
Roofing professionals generally represent R-values of tapered
insulation systems...
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