Minimum Roof Slope For 3 Tab Shingles

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.

Minimum roof slope for 3 tab shingles. Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch. Roof pitch designations are comprised of two numbers indicating a ratio.

This number corresponds to the number of inches of rise in a 12 foot run. Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. For those who don t understand the roof pitch number here is a way to envision it. 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.

Normal roof slope for typical installation. Asphalt shingles continue to be the most widely installed roof covering option in north america. With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 20 0 for slate roofs. We do install shingles on these in between.

Minimum roof pitch for shingles. Roof pitch defined and explained. 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. Low sloped roof shingle installation.

Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Pitch is the term used to describe the angle slope or slant of your roof. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

Learn what the minimum slope for an asphalt shingle roof is the difference between sloped and flat roofs and how to calculate the slope of any roof. Item 12061 model sa12. Owens corning supreme 33 33 sq ft shasta white 3 tab roof shingles. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12.