Minimum Roof Pitch For Asphalt Shingles On Flat Roof

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.

Minimum roof pitch for asphalt shingles on flat 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. Asphalt shingles do require that you have a minimum pitch to your roof. Considering the roof slope requirement is important. Asphalt shingles minimum roof slope roof pitch r905 2 2.

Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch. We can even help you find a professional to install it. 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. What is the minimum pitch slope of an asphalt shingle roof.

So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. The minimum requirement is 2 12. Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12.

Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. 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. 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.

Shingles of all types need to have a slope to function properly. There are plenty of other options however for flat and nearly. Why is 2 12 the minimum. Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.

Experience the total owens corning roofing system and high quality roofing shingles. 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. That works out to about nine degrees if that works better for you.

For those who don t understand the roof pitch number here is a way to envision it. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12. Roof pitch multiplier table. If you re having asphalt shingles put on your roof you will have to have a minimum slope.

Roof slope equivalents as rise. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Fortunately the requirements are quite accommodating. For example if it is a very low slope water including snowmelt or rainwater drains slowly and this increases the chances of.