Minimum Roof Pitch For Asphalt Shingles On Flat Roof

Asphalt shingles minimum roof slope roof pitch r905 2 2.

Minimum roof pitch for asphalt shingles on flat roof.

Experience the total owens corning roofing system and high quality roofing shingles. Minimum roof pitch for shingles 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 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 requirement is 2 12.

So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run. Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run. They won t be appropriate for all roofs. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.

Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12. Why is 2 12 the minimum. Roof pitch multiplier table. Fortunately the requirements are quite accommodating.

Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12. The roof pitch between 2 12 and 4 12 is considered as a low pitch roof so shingles can be installed in the roof slope between 2 12 and 4 12. Shingles of all types need to have a slope to function properly. Asphalt shingles continue to be the most widely installed roof covering option in north america.

For example if it is a very low slope water including snowmelt or rainwater drains slowly and this increases the chances of. What is the minimum pitch slope of an asphalt shingle roof. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

Degrees to pitch rise in run table. Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles. Let owens corning help you determine when it is time for a new roof and then let us help you choose the shingles for your roof that are right for you. For those who don t understand the roof pitch number here is a way to envision it.

We can even help you find a professional to install it. Asphalt shingles do require that you have a minimum pitch to your roof. Roof slope equivalents as rise. There are plenty of other options however for flat and nearly.

That works out to about nine degrees if that works better for you. Considering the roof slope requirement is important. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.