Roof Slope For Shingles 2 12

Asphalt shingles continue to be the most widely installed roof covering option in north america.

Roof slope for shingles 2 12.

18 43 asphalt shingles with special underlayment requirements 2 in 12. For example if it is a very low slope water including snowmelt or. That works out to about nine degrees if that works better for you. Minimum required slope x in 12 minimum required slope degrees asphalt shingles.

Shingles that are not self sealing must be hand sealed with asphalt roofing cement. Considering the roof slope requirement is important. Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.

What is the minimum slope for an asphalt shingle roof. With respect to shingle application roof slopes from 2 12 to less than 4 12 18 5 are called low slope roofs while roof slopes of 4 12 or greater are called normal or standard slopes. The minimum requirement is 2 12. 9 46 built up roof asphalt.

The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. In 12 0 25 in 12 1 19 built up roof coal tar pitch. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

Roofing material or system. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Why is 2 12 the minimum.

Shingles of all types need to have a slope to function properly. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Roof pitch basics a 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. The cabo one and two family dwelling code permits the installation of asphalt shingles on roofs with a slope as low as 2 12 if the shingles are double coverage self sealing versions.

A shingle roof like this north dallas garage in the photo above may have a failure no matter how good a job the installer did. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. The minimum slope for an asphalt shingle roof is 2 12. For every 12 horizontal feet the roof changes 8 feet in vertical height.

Minimum required roof slope for roofing materials. Asphalt shingles should never be applied to roof slopes below 2 12 2 of vertical rise for every 12 of horizontal run or 9 5. Simply put it s a shallow roof. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep.