2 12 Roof Grade

Roof pitch is the slope created by the rafter.

2 12 roof grade.

Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. A low slope roof is anywhere from 2 in 12 to 4 in 12. Most roof s have a pitch in the 4 12 to 9 12 range. 2 12 roof pitch angle 9 46 degrees.

Common roof pitches and equivalent grade degree and radian angles. Conventional slope roof range between 4 in 12 and 8 in 12. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. There s always torch down but i don t do a lot of it and i don t own a torch.

While roof slope is typically expressed in rise it can also be expressed in degrees or in percent of slope. That s the same as a 14 degree slope or a 25 slope. The most commonly used roof pitches fall in a range between 4 12 and 9 12. Image 1 12 to 12 12 roof pitch 7 12 pitch.

These benefits do not come cheaply though. The table below shows common roof pitches and the equivalent grade. A bituminous underlayment such as grace ice water shield under standard three tab asphalt shingles would work but only on slopes 2 12 and steeper. Roof pitch on the form x 12 can be expressed in grades as.

Steeper sloped roofs are considered more aesthetically pleasing and last longer. Asphalt shingles continue to be the most widely installed roof covering option in north america. What is the minimum slope for an asphalt shingle roof the short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Anything more than 9 in 12 is considered steep.

S grade 100 4 12 33 3 roof pitch on the form x 12 can be expressed in angles as. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. Why is the roof slope 25.

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 3 in 12 roof rises 3 for every 12 of run. I didn t want the rental expense not to mention the risk of using an open flame on a combustible roof surface. What is a 2 12 roof pitch if a roof rises 2 in a length of 12 this is 2 12 roof pitch.

3 of rise per 12 of run is the same as 1 of rise per 4 of run or 1 4 25. Roof pitch degree table. Simply put it s a shallow roof. Pitches above 9 12 are very highly angled and are designated steep slope roofs.

If this isn t practical then perform the same measurement on the underside of the roof. A 12 in 12 roof can cost up to 50 more than a 4 in 12 roof.