Minimum Roof Deck Slope For The Installation Of Clay Tile

This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units.

Minimum roof deck slope for the installation of clay tile.

Drip edges shall extend not less than 1 4 inch 6 4 mm below the roof sheathing and extend up back onto the roof deck not less than 2 inches 51 mm. Nrca does not recommend installing tile roof systems on roof slopes less than 4 12 18 degrees. Tiles shall be installed in accordance with the manufacturer s installation instructions in areas where the wind speed exceeds 100 mph and where the roof is located more than 40 feet above grade. These guidelines cover flat low medium and high profile roof tile using a minimum 3 tile headlap or a designed limited headlap on minimum 15 32 solid decking nailed in compliance with wind load requirements.

Overlap to be a minimum of 3 inches 76 mm. An ice dam protection membrane generally is a self adhering polymer modified bitumen membrane. To avoid this use wind clips on each tile along with a construction grade silicone sealant or other approved sealant. With fasteners as specified in section r905 2 5.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. 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. Minimum roof slope roof pitch r905 3 2 clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. About minimum slope allowed for clay tile roofs or other tile roofs if you read through standards such as icc es esr2015 concrete and clay roof tile installation manual for moderate climates copy on file you ll see that there is no prohibition of clay tiles on low slope roofs.

Drip edge at eaves shall be permitted to be installed either over or under the underlayment. Drip edges shall be mechanically fastened to the roof deck at not more than 12 inches 305 mm o c. Eave drip edges shall extend 1 2 inch 13 mm below sheathing and extend back on the roof a minimum of 2 inches 51 mm. Provide drip edge at eaves and gables of shingle roofs.

However on extremely steep roofs above 19 12 or on vertical applications wind currents may cause tiles to rattle. Tiles weighing less than 9 pounds per square foot shall have a minimum of one fastener each regardless of roof slope. 07300 shingles and roofing tiles 07320 roofing tiles mechanically fastened tile guidelines part i general. In general there is no maximum slope for tile roofs.