Minimum Roof Slope For 3 Tab Asphalt Roofing

Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above.

Minimum roof slope for 3 tab asphalt roofing.

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. Roofing material or system. A great many residential roofs fall into this category. For example if it is a very low slope water including snowmelt or.

9 46 built up roof asphalt. The roofing materials most often used for these pitches include asphalt composite shingles. Minimum required roof slope for roofing materials. We do install shingles on these in between.

There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. Low sloped roof shingle installation. Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch.

Asphalt shingles can only be installed on roof slopes of 2 12 or greater. Normal roof slope for typical installation. 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. Considering the roof slope requirement is important.

Asphalt shingles continue to be the most widely installed roof covering option in north america. 18 43 asphalt shingles with special underlayment requirements 2 in 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. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

The minimum slope for an asphalt shingle roof is 2 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. Asphalt shingles minimum roof slope roof pitch r905 2 2. In 12 0 25 in 12 1 19 built up roof coal tar pitch.

Why is 2 12 the minimum. For those who don t understand the roof pitch number here is a way to envision it. 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. This number corresponds to the number of inches of rise in a 12 foot run.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.