Minimum Slope For Concrete Tile Roof

However on extremely steep roofs above 19 12 or on vertical applications wind currents may cause tiles to rattle.

Minimum slope for concrete tile roof. In general there is no maximum slope for tile roofs. A frame roof a steep pitched gable roof each slope extending from close to the ground line to meet at the top ridge. When the roof angle is less than 30º the windward slope can be subjected to severe suction or negative pressure fig 4. 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. This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. 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.

And our brand new mendip 12 5 can be used at an even lower pitch of 12 5 restrictions on rafter length may apply. Fixing tile roofs in cyclonic regions 15 minimum roof pitch 15 maximum rafter lengths 15 maximum rafter lengths no sarking 15. Roofs steeper than 35º generally present sufficient obstruction to the wind for a positive. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

Boral concrete tiles are manufactured using an extrusion process. Clay tiles are colorfast which means their tints improve rather than fade over time. Asphalt shingles continue to be the most widely installed roof covering option in north america. In general the minimum slope for a tile roof is 3 12.

The underlying roof provides all the necessary waterproofing. Both clay and concrete tile are available in many colors and are naturally weather resistant. If a customer insists on installing roof tiles on a roof with a pitch below 3 12 consult the tile manufacturer for installation specifications. Our wessex and mendip concrete roof tiles can be used down to a minimum 15 pitch.