Uploaded March 2024 | Updated September 2026, 44 minutes ago

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Unvented roofs, also known as "conditioned roofs," have a negative reputation in the building community due to the many issues that arise from poorly designed unvented roof assemblies. This has led many builders and design professionals to avoid them altogether. However, when correctly designed, unvented roofs can outperform vented roofs in all climates. In this video, we will debunk five of the biggest myths surrounding unvented roofs, explain how to design them properly to avoid moisture issues, and demonstrate how they can increase the durability of your home.

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0:00 Intro
0:29 Myth 1 Unvented Roofs Will Rot
2:49 Myth 2 You Must Use Spray Foam
5:34 Myth 3 Unvented Roofs Cause Ice Dams
7:40 Myth 4 Unvented Roofs Make Shingles Blow Off
8:20 Myth 5 Unvented Roofs Are Hotter
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