Building Science
Roof Insulation: A Positive Investment to Reduce Total Carbon
By Authors Elizabeth Grant
September 18, 2024
Building Science
By Don Kilcoyne
January 04, 2019
Welcome to Episode 4 of The Building Science FAQ series.
The Building Science FAQ video series explores some of the technical questions that crop up when specifying a low-slope roof.
In this episode, Jennifer Keegan, director of building and roof science, GAF, and Jim Kirby, GAF building and roofing science architect, address a common area of confusion: "What is the difference between an air barrier and a vapor retarder?" While an air barrier stops air leakage, a vapor retarder reduces moisture diffusion to reduce the risk of condensation forming in the roof assembly. But can an air barrier be a vapor retarder?
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