The table below shows common roof pitches and the equivalent grade degrees and radians for each.
Exampl of roof pitch.
Most roof s have a pitch in the 4 12 to 9 12 range.
Thus pitch is typically greater in areas of high rain or snowfall.
Roofs with pitches above 3 12 often use architectural shingles or modified bitumen materials.
One of the most important aspects of trying to get the roof right though is the pitch.
The way pitch also known as roof slope is measured is rise over run.
Measure the run length it is the horizontal distance between the roof ridge and the wall of the building.
Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.
So if your roof rises 4 inches for every 12 inches of horizontal length then the pitch of your roof is expressed as 4 12.
The exact roof slope in degrees is given by the arctangent.
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.
Roof pitch is a measurement of a roof s slope expressed as a ratio.
Image 1 12 to 12 12 roof pitch 7 12 pitch.
In degrees 10 2 in 12 or 1 in 6 is considered a minimum.
Let s assume it is equal to 6 m.
Let s say it is equal to 1 5 m.
Roof pitch degree table.
Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials.
Measure the rise of your roof.
A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible.
Definitions vary on when a roof is considered pitched.
Calculate the rafter length substituting these values into the following formula.
Roof pitch is the measurement of roof steepness.
Roof slope calculator example of use.
For example you may think you want classic composite shingles on your roof but if the pitch is below a certain ratio you may be forced to install a different type of roofing perhaps rolled roofing or standing seam metal roofing.
If this isn t practical then perform the same measurement on the underside of the roof.
We included a roof pitch chart below the 7 12 example image and the calculator below that.
Many factors determine which roofing materials you can use and one make or break factor is the slope of the roof known as roof pitch.
Understanding a roof s pitching can be quite tough if you are just getting started and working with a roofer can leave you a little bit unsure about what is being suggested with regard to the job there s so much to learn that it can become a bit baffling.
