Roof Slope For Shingles 2 12

In 12 0 25 in 12 1 19 built up roof coal tar pitch.

Roof slope for shingles 2 12. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Minimum required slope x in 12 minimum required slope degrees asphalt shingles. For every 12 horizontal feet the roof changes 8 feet in vertical height. Shingles that are not self sealing must be hand sealed with asphalt roofing cement.

Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope. 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. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. That works out to about nine degrees if that works better for you.

What is the minimum slope for an asphalt shingle roof. Asphalt shingles continue to be the most widely installed roof covering option in north america. 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. For example if it is a very low slope water including snowmelt or.

The minimum requirement is 2 12. The minimum slope for an asphalt shingle roof is 2 12. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. Roof pitch basics a 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance.

Shingles of all types need to have a slope to function properly. Why is 2 12 the minimum. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. 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.

9 46 built up roof asphalt. Considering the roof slope requirement is important. High and low pitch examples. Roofing material or system.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. 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. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. 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.

Simply put it s a shallow roof. 18 43 asphalt shingles with special underlayment requirements 2 in 12. 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. A corresponding editor paul fisette replies.