How To Roof A 2 12 Pitch

Roof pitch designations are comprised of two numbers indicating a ratio.

How to roof a 2 12 pitch.

Find the inverse tangent of the pitch to find the angle in degrees. Or the colon can replace the slash as in 2 12 or 7 12. Pitch has a basic range but it s not uniformly defined however the range from flat that is not perfectly flat but is sloped in order to drain water is up to 12 2 12. 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.

Roof pitch degree table. Divide the first part of the ratio by 12 to work out the pitch. I m also getting a new roof this week. We included a roof pitch chart below the 7 12 example image and the calculator below that.

A 12 in 12 pitch is a steep 45 degree angle roof. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks. 04 29 2011 05 29 am 13. Generally such roofs have a pitch ranging from 1 2 12 to 2 12.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. Roof pitch defined and explained. See the image below for more explanation on rise run and pitch.

But i ve lived in a house with a 2 5 in 12 pitch for 20 years. The traditional metal roof types such as 5v crimp shown above and corrugated are rated by the manufacturers for use down to a 3 12 pitch three inches of vertical rise for every foot of horizontal run. Conventional roofs are the easiest to construct and you can walk on them safely. A 12 12 pitch roof has a pitch angle of 45.

Conventional forms range from 4 12 9 12 and steep slope roofing is more than 9 12 and requires extra fasteners. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. If this isn t practical then perform the same measurement on the underside of the roof. To convert between american roofing ratios and pitch degrees follow these steps.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. That s why i m checking this forum keeping my fingers crossed. Most roof s have a pitch in the 4 12 to 9 12 range. No leaks or problems.

These roofs have a pitch less than 4 12. They have a pitch ranging from 4 12 to 9 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. Pitch is the term used to describe the angle slope or slant of your roof.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.