Tile Roof Slope Minimum

Minimum roof slopes required by roofing material requirements for roof coverings section r905.

Tile roof slope minimum. On slopes less than 3 1 2 12 roofing tile is considered decorative only. 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.

What is the minimum pitch for a tiled roof. 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. 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.

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. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Minimum roof slope roof pitch r905 2 2 asphalt shingles can only be installed on roof slopes of. The underlying roof provides all the necessary waterproofing.