Min Roof Slope For Shingles

This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.

Min roof slope for shingles.

Asphalt shingles continue to be the most widely installed roof covering option in north america. The minimum requirement is 2 12. Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run. Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work.

Residential low slope roofing can generally be divided up into two broad categories. Finding the right products for your low slope roof. Roofing material or system. 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.

The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. For those who don t understand the roof pitch number here is a way to envision it. 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. This number corresponds to the number of inches of rise in a 12 foot run.

Shingles of all types need to have a slope to function properly. 18 43 asphalt shingles with special underlayment requirements 2 in 12. There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12. What is the minimum pitch slope of an asphalt shingle roof.

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. Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12. That works out to about nine degrees if that works better for you.

Match the roofing on the covered porch with the main roof. 9 46 built up roof asphalt. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12.

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

In 12 0 25 in 12 1 19 built up roof coal tar pitch. Minimum required slope x in 12 minimum required slope degrees asphalt shingles.