Common roof pitches and equivalent grade degree and radian angles.
Figuring out slope of roof.
Write the roof slope as the ratio of rise over run or vertical distance over horizontal distance.
Knowing the pitch of your roof is useful when designing an addition installing skylights or cutting new rake boards.
Roof pitch calculator results explained.
Either way let s see how you can calculate the slope of a roof without using a roof slope calculator.
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.
For example if your tape measure found a 6 inch vertical distance to the 12 inch mark on your level the slope is 6 12 or 6 in 12.
Learn more about finding the angle of a line using our slope calculator.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.
To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.
Angle the angle of a roof is the same as the roof s slope except instead of being.
Measuring the slope from the rafters.
The most precise way to find the roof s slope is by measuring it from the underside.
Most roof s have a pitch in the 4 12 to 9 12 range.
How to measure roof pitch.
You will need to express this size in terms of square feet.
Outside of the u s a degree angle is typically used.
To avoid this problem from occurring you should always look for a roof pitch calculator to help you take things a step further.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
It is often compared to slope but is not exactly the same.
Calculate the roof slope.
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.
Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure.
If you are trying hard to work out how to figure roof pitch measurements the calculator takes away all of those problems for you more or less instantly.
Here s an easy safe way to determine the pitch from inside your attic.
The minimum roof pitch for shedding snow is around 30 or a 6 12 or 7 12 slope although this is not a definite as the material of your roof the direction of the snow and wind are some factors that can affect whether or not snow will slide as roofs of as little as 10 have been reported to shed snow.
