Is A Roof Pitch Of 11 12 Allowed

If a roof rises 11 in a length of 12 this is 11 12 roof pitch.

Is a roof pitch of 11 12 allowed.

Asphalt shingles continue to be the most widely installed roof covering option in north america. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The following table provides the minimum required. 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. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

If this isn t practical then perform the same measurement on the underside of. Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the corresponding horizontal distance or run you write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run. On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. The combination of two numbers are used to display or show the roof pitch.

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. Normal roof slope for typical installation. 11 12 roof pitch angle 42 51 degrees. As aforementioned there is no standard pitch of a roof.

Most roof s have a pitch in the 4 12 to 9 12 range. If 4 12 and above is normal and 2 12 is minimum what about properties with roofs in between the two such as a 3 12 pitched roof. Low sloped roof shingle installation. You can also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler.

Roof slope equivalents as rise. For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12.