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.
Roof 2 and 12 pitch.
Or the colon can replace the slash as in 2 12 or 7 12.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
What is the minimum slope for an asphalt shingle roof.
This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.
12 12 roof pitch 45 angle 45 degrees details.
A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely makes the cut off for one of the most popular roofing material options.
If this isn t practical then perform the same measurement on the underside of the roof.
Roof pitch designations are comprised of two numbers indicating a ratio.
Pitch is the term used to describe the angle slope or slant of your roof.
The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.
Roof pitch chart what is roof pitch chart.
There is no standard universal roof pitch roof pitch varies depending on culture climate style and available materials in the usa the range of standard pitches is anywhere between 4 12 and 9 12 in the uk the typical house has a pitch between 40 50 although 45 should be avoided.
7 12 roof pitch 30 angle 30 26 degrees details.
Most roof s have a pitch in the 4 12 to 9 12 range.
9 12 roof pitch 37 angle 36 37 degrees details.
Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them.
The table below shows common roof pitches and the equivalent grade degrees and radians for each.
What is the standard pitch for a roof.
Contemporary houses often have flat roofs which shouldn.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
We included a roof pitch chart below the 7 12 example image and the calculator below that.
Roof pitch defined and explained.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
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.
2 12 roof pitch angle 9 46 degrees.
Roof pitch degree table.
Image 1 12 to 12 12 roof pitch 7 12 pitch.