Minimum Slope For Clay Tile Roof

Made from natural clay the tiles exude character and quality that.

Minimum slope for clay tile roof.

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. The irc recommends a minimum pitch of 2 5 12 for these materials. What is the minimum slope for a clay or concrete tile roof. Fixing tile roofs in cyclonic regions 15 minimum roof pitch 15 maximum rafter lengths 15 maximum rafter lengths no sarking 15.

Aluminum or galvanized sheet metal sufficient for the life of an average asphalt roof would be the weakest link in a clay tile roof. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Concrete is long lasting with a minimum lifespan of 50 years depending on climate. However on extremely steep roofs above 19 12 or on vertical applications wind currents may cause tiles to rattle.

A frame roof a steep pitched gable roof each slope extending from close to the ground line to meet at the top ridge. Instead flashing for clay tile must be formed from heavy gauge copper or stainless steel. In general there is no maximum slope for tile roofs. Traditionally a minimum roof pitch of 20 was recommended in bs 5534 but modern tiles and slates have now been designed for applications as low as 15.

Rather for slopes at 3 12 or less the installer is required to. Clay tiles are colorfast which means their tints improve rather than fade over time. 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. Likewise the nails used to attach clay tiles to the decking should be corrosion resistant copper or stainless steel.

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. It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5. Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment. For many years 20 was recommended as the minimum pitch for clay tiles but this has decreased in the modern era down to 15.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.