Minimum Pitch Angle Shingle Roof

Complete list of roofing types.

Minimum pitch angle shingle roof. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. Roof pitch designations are comprised of two numbers indicating a ratio. Roof pitch defined and explained. The minimum requirement is 2 12.

However you can only use this pitch with built up roofing or specialized synthetic roofing. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Roof pitch multiplier table. Pitch is the term used to describe the angle slope or slant of your roof.

Asphalt shingles continue to be the most widely installed roof covering option in north america. Pitch angle incline slope they all can be used to refer to the steepness of a roof. Roof slope equivalents as rise. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.

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. Or the colon can replace the slash as in 2 12 or 7 12. Shingles of all types need to have a slope to function properly.

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. That works out to about nine degrees if that works better for you. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. 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.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. Degrees to pitch rise in run table. 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. Asphalt shingles can only be installed on roof slopes of 2 12 or greater.

Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the. 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.