How To Look At A House
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What is the minimum slope for a clay or concrete tile roof?
Sunday, July 1, 2018
The International Residential Code (IRC) specifies a minimum 4/12 pitch (4 inches of vertical rise for every 12 inches of horizontal run) for a clay or concrete tile roof, except that a pitch as low as 2-1/2/12 is allowed when two layers of underlayment are applied.
Florida Building Code (FBC) specifies that clay and concrete tile be installed to the standards in the Florida Roofing and Sheet Metal Association’s (FRSA) Concrete and Clay Roof Tile Installation Manual FRSA/TRI 07320. The manual lists different minimum slopes according to the type of underlayment and tile installation method, which varies from 2/12 to 4/12. It is also an excellent contractor resource, with extensive illustrations of flashing and other installation details.
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To learn more about roofs and attics, see these other blog posts:
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