U.S. Department of Energy - Energy Efficiency and Renewable Energy
US Department of Energy Office of Energy Efficiency and Renewable Energy
Building Energy Codes Program
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Building Energy Codes Program

Examples of Installed Vapor Retarders

Polyethylene sheeting
Polyethylene sheeting over unfaced batts

Kraft-backed insulation
Kraft-backed insulation

REScheck

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IECC Basics | REScheck Compliance | REScheck Example