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NRCA design guidelines

Roof system manufacturers typically have specific minimum design recommendations when rooftop solar systems are installed and should be consulted for their specific recommendations and requirements. The installation of solar systems on a roof without written authorization from the roof system manufacturer may void the roof system manufacturer's warranty. Designers should review roof system warranty provisions with the owner(s) and solar system supplier(s) and consult the roof system manufacturer to verify the consequences of a solar system installation on the roof system warranty coverage.

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