Minimum Gradient For Tiled Roof

According to this code the minimum slope for asphalt shingles is 17 degrees or two vertical units to twelve units in the horizontal.

Minimum gradient for tiled roof.

Pitch the pitch also known as slope or grade is the way in which the roof angles from the horizontal toward its highest point. Clay and concrete tile minimum roof slope roof pitch r905 3 2. The requirements for an asphalt shingles roof are contained in the international building code. 416 964 9415 1 800 268 7070 email.

Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Check with the. Express the slope of a metal roof by a ratio which indicates the pitch of the roof.

You need to consider the slope requirements of each panel to determine this minimum slope. 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 minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

Asphalt shingles continue to be the most widely installed roof covering option in north america. This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units. The profile is the shape taken by the sheets when you bend them to form panels. 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.

The minimum slope or pitch fopr atile roof will depend on the exact profile of tile you are using. 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 same can also be the case when the tiled roof has a reduced exposure. Carson dunlop associates ltd 120 carlton street suite 407 toronto on m5a 4k2.

The lowest any tile can usually go is about 15 degrees but some must be steeper. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. The minimum slope of a roof depends on the roof s profile. Minimum slope for asphalt shingles.