Minimum Roof Pitch Nh

Asphalt shingles continue to be the most widely installed roof covering option in north america.

Minimum roof pitch nh.

However you can only use this pitch with built up roofing or specialized synthetic roofing. The profile is the shape taken by the sheets when you bend them to form panels. The values given here. The minimum requirement is 2 12.

What is the minimum pitch slope of an asphalt shingle roof. 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. The minimum roof slope for metal roofs is dependent upon the roof profile.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. 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.

Express the slope of a metal roof by a ratio which indicates the pitch of the roof. That works out to about nine degrees if that works better for you. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Shingles of all types need to have a slope to function properly.

The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.