U.S. Department of Energy - Energy Efficiency and Renewable Energy

Building Technologies Office – Energy Open House

Roof Overhangs

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Roof overhangs can help block hot summer sun.
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Energy Facts: Roof overhangs on the southern side of a home can block high summer sun from entering windows and overheating the home. Depending on the depth of the overhang, it may allow winter sun to enter the space and provide passive solar heating.

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Scout It Out: Are there roof overhangs on the southern side of your home? Explore this and other potential passive solar design features to cost-effectively reduce your energy use. If you're considering building a home, discuss the principles of passive solar design with your builder before you break ground!