Minimum Roof Slope For 3 Tab Asphalt Roofing

Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work.

Minimum roof slope for 3 tab asphalt roofing.

Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch. 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. The roofing materials most often used for these pitches include asphalt composite shingles. Minimum required slope x in 12 minimum required slope degrees asphalt shingles.

The minimum slope for an asphalt shingle roof is 2 12. Normal roof slope for typical installation. For those who don t understand the roof pitch number here is a way to envision it. 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. Asphalt shingles minimum roof slope roof pitch r905 2 2. Why is 2 12 the minimum. Asphalt shingles can only be installed on roof slopes of 2 12 or greater.

Considering the roof slope requirement is important. Asphalt shingles continue to be the most widely installed roof covering option in north america. This number corresponds to the number of inches of rise in a 12 foot run. 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.

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. 18 43 asphalt shingles with special underlayment requirements 2 in 12. Roofing material or system. 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.

There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. 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. In 12 0 25 in 12 1 19 built up roof coal tar pitch. Minimum required roof slope for roofing materials.

We do install shingles on these in between. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. 9 46 built up roof asphalt. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

A great many residential roofs fall into this category.