Roof slope equivalents as rise.
Minimum roof pitch for asphalt shingles on flat roof.
Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles.
Fortunately the requirements are quite accommodating.
Asphalt shingles do require that you have a minimum pitch to your roof.
Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.
For those who don t understand the roof pitch number here is a way to envision it.
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.
The minimum requirement is 2 12.
That works out to about nine degrees if that works better for you.
Asphalt shingles minimum roof slope roof pitch r905 2 2.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12.
This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.
If you re having asphalt shingles put on your roof you will have to have a minimum slope.
For example if it is a very low slope water including snowmelt or rainwater drains slowly and this increases the chances of.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
We can even help you find a professional to install it.
Experience the total owens corning roofing system and high quality roofing shingles.
Roof pitch multiplier table.
The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.
What is the minimum pitch slope of an asphalt shingle roof.
Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch.
Degrees to pitch rise in run table.
Shingles of all types need to have a slope to function properly.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
Asphalt shingles can only be installed on roof slopes of 2 12 or greater.
There are plenty of other options however for flat and nearly.
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.
Considering the roof slope requirement is important.
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.
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.
