Minimum Roof Slope

This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.

Minimum roof slope.

Roof pitch is the degree of building s roof slope. Asphalt shingles continue to be the most widely installed roof covering option in north america. Minimum pitch for metal roof. The minimum roof pitch for shedding snow is around 30 or a 6 12 or 7 12 slope although this is not a definite as the material of your roof the direction of the snow and wind are some factors that can affect whether or not snow will slide as roofs of as little as 10 have been reported to shed snow.

To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. You need to consider the slope requirements of each panel to determine this minimum slope. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Asphalt shingles minimum roof slope roof pitch r905 2 2. The values given here.

The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. The minimum slope of a roof depends on the roof s profile. However you can only use this pitch with built up roofing or specialized synthetic roofing. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

It determines how many inches the roof should rise for every 12 inches expanding on the horizontal side. Amongst many decisions one has to make when designing a metal building determining metal roof minimum slope is one of them. The profile refers to the shape the metal sheets take when they bend to. With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels.

The minimum roof slope for metal roofs is dependent upon the roof profile. The profile is the shape taken by the sheets when you bend them to form panels. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.