The minimum requirement is 2 12.
Minimum roof pitch for felt shingles.
The shingles overlap each other by about 150 mm at the ridge a capping piece is used.
Felt tiles or roofing shingles.
18 43 asphalt shingles with special underlayment requirements 2 in 12.
Using felt tiles is the next step up in quality.
The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.
In 12 0 25 in 12 1 19 built up roof coal tar pitch.
Asphalt shingle manufacturers will warrant shingles installed on roof slopes as low as 2 12 when these special installation procedures are followed.
Rough cost m 2.
Roofing material or system.
9 46 built up roof asphalt.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
Minimum required slope x in 12 minimum required slope degrees asphalt shingles.
For the rest of the roof slope the felt underlayment must be installed with a 19 inch top lap and a 12 inch side lap providing double coverage of the felt layer.
Minimum required roof slope for roofing materials.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
What is the minimum pitch slope of an asphalt shingle roof.
That works out to about nine degrees if that works better for you.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
All asphalt shingle roofs with a pitch of 4 12 or more have an underlayment of 15 lb.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
Installation on roof slopes below a 2 in 12 pitch is not recommended at all.
Roofing shingles are laid starting at the bottom of the roof.
Metal roof shingles require a minimum roof pitch of 3 12 or greater.
Asphalt felt paper that is tacked to the roof sheathing.
The asphalt shingle manufactures recommend that you install asphalt shingles on a recommended minimum of 4 in 12 or greater however most manufactures will warrant their shingles down to a 2 in 12 pitch if the recommended installation method is used.
Asphalt shingles require a minimum roof pitch of 2 12 or greater.
Shingles of all types need to have a slope to function properly.
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.
Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater.
