Minimum Roof Slope For 3 Tab Asphalt Roofing

Asphalt shingles can only be installed on roof slopes of 2 12 or greater.

Minimum roof slope for 3 tab asphalt roofing.

Roofing material or system. Why is 2 12 the minimum. This number corresponds to the number of inches of rise in a 12 foot run. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

18 43 asphalt shingles with special underlayment requirements 2 in 12. Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12. Normal roof slope for typical installation. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.

There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. A great many residential roofs fall into this category. We do install shingles on these in between. 9 46 built up roof asphalt.

For those who don t understand the roof pitch number here is a way to envision it. 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. In 12 0 25 in 12 1 19 built up roof coal tar pitch. Asphalt shingles minimum roof slope roof pitch r905 2 2.

Considering the roof slope requirement is important. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Low sloped roof shingle installation. Traditional 3 tab shingles made with asphalt composite are the most popular type of shingle and are the most flexible in terms of adapting to many roof pitches.

The roofing materials most often used for these pitches include asphalt composite shingles. The minimum slope for an asphalt shingle roof is 2 12. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. Minimum required roof slope for roofing materials.

Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. 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. The roof pitch between 2 12 and 4 12 is considered as a low pitch roof so shingles can be installed in the roof slope between 2 12 and 4 12. Minimum required slope x in 12 minimum required slope degrees asphalt shingles.

Asphalt shingles continue to be the most widely installed roof covering option in north america.