Minimum Roof Slope For 3 Tab Asphalt Roofing

Normal roof slope for typical installation.

Minimum roof slope for 3 tab asphalt roofing.

There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. Asphalt shingles continue to be the most widely installed roof covering option in north america. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. In 12 0 25 in 12 1 19 built up roof coal tar pitch.

Considering the roof slope requirement is important. For example if it is a very low slope water including snowmelt or. This number corresponds to the number of inches of rise in a 12 foot run. Roofing material or system.

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 required roof slope for roofing materials. 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 roofing materials most often used for these pitches include asphalt composite shingles.

A great many residential roofs fall into this category. Why is 2 12 the minimum. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. Low sloped roof shingle installation.

The minimum slope for an asphalt shingle roof is 2 12. Minimum required slope x in 12 minimum required slope degrees asphalt shingles. 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. 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.

Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. 18 43 asphalt shingles with special underlayment requirements 2 in 12. 9 46 built up roof asphalt. Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12.

Asphalt shingles minimum roof slope roof pitch r905 2 2. Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. 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.

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.