Residential low slope roofing can generally be divided up into two broad categories.
Minimum roof slope for shingles.
Asphalt shingles can only be installed on roof slopes of 2 12 or greater.
The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.
Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.
Some will argue that shingles shouldn t be used for low pitch roofs at all.
9 46 built up roof asphalt.
If you have a low slope roof but would love to have a shingled look rather than other solutions like rolled sheet roofing you are in.
That works out to about nine degrees if that works better for you.
Minimum required slope x in 12 minimum required slope degrees asphalt 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.
Low slope roofing shingles.
Minimum required roof slope for roofing materials.
So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run.
Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.
Finding the right products for your low slope roof.
Shingles of all types need to have a slope to function properly.
The minimum requirement is 2 12.
The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
Roofing material or system.
This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
Larger flat roofed applications low slope such as residential condominium complexes row homes and town houses and smaller applications such as residential porch and garage transitions from the main home where the slope of the roof changes dramatically.
What is the minimum pitch slope of an asphalt shingle roof.
In 12 0 25 in 12 1 19 built up roof coal tar pitch.
18 43 asphalt shingles with special underlayment requirements 2 in 12.
Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work.
However those naysayers would be wrong.
Low slope roofs present a challenge where water is concerned.
Asphalt shingles minimum roof slope roof pitch r905 2 2.
