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Minimum slope of roof for shingles.
Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run.
In high moisture climates low slope roofs will require additional maintenance to ensure excess water does not enter your home.
Learn more about slope roof.
The minimum requirement is 2 12.
The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.
According to this code the minimum slope for asphalt shingles is 17 degrees or two vertical units to twelve units in the horizontal.
Minimum slope for asphalt shingles.
That works out to about nine degrees if that works better for you.
Asphalt shingles minimum roof slope roof pitch r905 2 2.
Shingles of all types need to have a slope to function properly.
This number corresponds to the number of inches of rise in a 12 foot run.
Asphalt shingles can only be installed on roof slopes of 2 12 or greater.
If your home features a low slope roof you can still install the cedar roof of your dreams.
Experience the total owens corning roofing system and high quality roofing shingles.
Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.
The roof pitch between 2 12 and 4 12 is considered as a low pitch roof.
Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.
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.
This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
The requirements for an asphalt shingles roof are contained in the international building code.
There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12.
What is the minimum pitch slope of an asphalt shingle roof.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.
