April 2011
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Energy codes and tapered insulation | Tech Today

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Energy codes and tapered insulation

IECC provides guidance for tapered insulation requirements

by Mark S. Graham
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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.

Methods

Roofing professionals generally represent R-values of tapered insulation systems...



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