Minimum Pitch Angle Shingle Roof

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.

Minimum pitch angle shingle roof.

In the roofing trade the go to term is pitch and it is expressed in terms of 12 inches so the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally. However you can only use this pitch with built up roofing or specialized synthetic roofing. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. 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.

That works out to about nine degrees if that works better for you. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Asphalt shingles minimum roof slope roof pitch r905 2 2. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.

Complete list of roofing types. The minimum requirement is 2 12. Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the. Roof slope equivalents as rise.

Shingles of all types need to have a slope to function properly. Degrees to pitch rise in run table. Pitch angle incline slope they all can be used to refer to the steepness of a roof. Roof pitch defined and explained.

Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. It is important for shingle roofs to function properly and one method of ensuring that this is achieved is to observe the pitch requirements for the shingles. Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

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

Or the colon can replace the slash as in 2 12 or 7 12. Asphalt shingles can only be installed on roof slopes of 2 12 or greater.