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