Min Roof Slope For Shingles

Minimum roof pitch for shingles it is important for shingle roofs to function properly and one method of ensuring that this is achieved is to observe the pitch requirements for the shingles.

Min roof slope for shingles.

Asphalt shingles minimum roof slope roof pitch r905 2 2. So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run. Minimum required roof slope for roofing materials. The minimum pitch for shingles is 1 6 which is equivalent to 4.

For those who don t understand the roof pitch number here is a way to envision it. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. Match the roofing on the covered porch with the main roof. The minimum requirement is 2 12.

Shingles of all types need to have a slope to function properly. Determine the minimum slope of the roof based on the roofing material. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. Minimum required slope x in 12 minimum required slope degrees asphalt shingles.

What is the minimum pitch slope of an asphalt shingle roof. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12. Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch. Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12.

Larger flat roofed applications low slope such as residential condominium complexes row homes and town houses and smaller applications such as residential porch and garage transitions from the main home where the slope of the roof changes dramatically. In 12 0 25 in 12 1 19 built up roof coal tar pitch. 18 43 asphalt shingles with special underlayment requirements 2 in 12. Roofing material or system.

There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. This number corresponds to the number of inches of rise in a 12 foot run. 9 46 built up roof asphalt. Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.

Asphalt shingles can only be installed on roof slopes of 2 12 or greater. Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. Asphalt shingles continue to be the most widely installed roof covering option in north america.

Residential low slope roofing can generally be divided up into two broad categories. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.