Tile Roof Slope Minimum

What is the minimum slope for a clay or concrete tile roof.

Tile roof slope minimum.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. In general there is no maximum slope for tile roofs. The pitch also known as slope or grade is the way in which the roof angles from the horizontal toward its. 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.

On slopes less than 3 1 2 12 roofing tile is considered decorative only. 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. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Minimum roof slope roof pitch r905 2 2 asphalt shingles can only be installed on roof slopes of.

However on extremely steep roofs above 19 12 or on vertical applications wind currents may cause tiles to rattle. Now lets get into the minimum roof slope requirements based on the. Roofers must turn to local or state building codes when installing tiled roofs if they want their. Minimum roof slopes required by roofing material requirements for roof coverings section r905.