Minimum Roof Pitch For Asphalt Shingles On Flat Roof

Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles.

Minimum roof pitch for asphalt shingles on flat roof.

That works out to about nine degrees if that works better for you. For example if it is a very low slope water including snowmelt or rainwater drains slowly and this increases the chances of. Asphalt shingles do require that you have a minimum pitch to your roof. Experience the total owens corning roofing system and high quality roofing shingles.

Roof slope equivalents as rise. Asphalt shingles continue to be the most widely installed roof covering option in north america. If you re having asphalt shingles put on your roof you will have to have a minimum slope. Fortunately the requirements are quite accommodating.

Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12. For those who don t understand the roof pitch number here is a way to envision 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. Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. They won t be appropriate for all roofs. So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run. 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.

What is the minimum pitch slope of an asphalt shingle roof. Degrees to pitch rise in run table. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. Asphalt shingles minimum roof slope roof pitch r905 2 2.

Considering the roof slope requirement is important. 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. We can even help you find a professional to install it. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch. The minimum requirement is 2 12. There are plenty of other options however for flat and nearly. Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.

This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. Roof pitch multiplier table. Why is 2 12 the minimum. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.