Slope For Tile Roof

Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.

Slope for tile roof.

However on extremely steep roofs above 19 12 or on vertical applications wind currents may cause tiles to rattle. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. You need to consider the slope requirements of each panel to determine this minimum slope. Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years.

Although ceramic tile roofs are expensive they can have a life span of over 100 years. The profile is the shape taken by the sheets when you bend them to form panels. This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units. Express the slope of a metal roof by a ratio which indicates the pitch of the roof.

If a roof increases in height by four inches for every foot of horizontal run it is considered to have a 4 in 12 pitch or just a 4 pitch talk in terms of pitches and you will always be understood in the roofing universe. This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. To avoid this use wind clips on each tile along with a construction grade silicone sealant or other approved sealant.

Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. To calculate roof pitch take the lowest point of the roof and measure the amount of rise for every 12 inches of horizontal movement toward the highest point. It is often compared to slope but is not exactly the same. The minimum slope of a roof depends on the roof s profile.

So the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally. Also if clay and concrete roof tiles are installed on a roof slope of 2 1 2 12 to 4 12 it shall be provided with a double underlayment application. For example a roof that rises 3 inches for every 12 inches has a pitch of 3 12. 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.

In general there is no maximum slope for tile roofs.