Minimum Roof Pitch For 3 Tab Shingles

Roof pitch designations are comprised of two numbers indicating a ratio.

Minimum roof pitch for 3 tab shingles.

Asphalt shingles continue to be the most widely installed roof covering option in north america. Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12. Experience the total owens corning roofing system and high quality roofing shingles. What precautions need to be taken to install shingles on low slopes.

Asphalt shingles are an effective roof covering material for sloped roofs that can be successfully used on slopes as low as 2 12. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. With respect to shingle application roof slopes from 2 12 to less than 4 12 18 5 are called low slope roofs while roof slopes of 4 12 or greater are called normal or standard slopes. I have heard of special methods being used for 3 tab asphalt shingle and low roof pitches less than 4 pitch that includes adhering the shingles and changing the reveal so that in the roofer would be nailing through 3 layers of shingles prevents wind lift off.

Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. Normal roof slope for typical installation. A roof slope of 2 12 up to but not including 4 12 is considered as low in residential construction.

If 4 12 and above is normal and 2 12 is minimum what about properties with roofs in between the two such as a 3 12 pitched roof. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. What slope is considered low slope for shingles. Roof pitch defined and explained.

Pitch is the term used to describe the angle slope or slant of your roof. For those who don t understand the roof pitch number here is a way to envision it. This number corresponds to the number of inches of rise in a 12 foot run. Or the colon can replace the slash as in 2 12 or 7 12.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. 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. For low slopes as well as any other slope your local building department should be contacted.

Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch. Low sloped roof shingle installation.