Minimum Roof Pitch Nh

The minimum slope of a roof depends on the roof s profile.

Minimum roof pitch nh.

Express the slope of a metal roof by a ratio which indicates the pitch of the roof. What is the minimum pitch slope of an asphalt shingle roof. Shingles of all types need to have a slope to function properly. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

However you can only use this pitch with built up roofing or specialized synthetic roofing. The minimum requirement is 2 12. 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 pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.

You need to consider the slope requirements of each panel to determine this minimum slope. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. The values given here. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

Minimum pitch for metal roof. Asphalt shingles continue to be the most widely installed roof covering option in north america. That works out to about nine degrees if that works better for you. The minimum roof slope for metal roofs is dependent upon the roof profile.

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