Multiply step 1 and step 2 i e.
Roof multiplier for 12 12 pitch.
Get your roof size by using this roof pitch calculator.
Roof pitch degree table.
The pitch of the roof is the rise over a 12 inch run.
The pitch of this roof is 4 8 12.
Multiply 20 and 40 which equals 800.
Typically the steeper the roof is the higher the price will be.
If the home measures 20 x 40 and has a 7 12 roof then to calculate the slope of the roof follow these steps.
Roof is 6 12 pitch and measures at 2 400 square feet.
Image 1 12 to 12 12 roof pitch 7 12 pitch.
800 multiplied by 1 16.
Since pitch is the rise over a 12 inch run divide the run by 12 to get the multiplier in this case 120 12 10.
Helps determine what materials are suitable for your roof.
Roofers typically refer to it as a pitch and can be found by factoring the rise over a 12 inch run.
We included a roof pitch chart below the 7 12 example image and the calculator below that.
Pitches between 8 12 and 10 12 33 40 are also considered walkable.
The value arrived at 928 reflects the square feet of the roof.
Find the value of 7 12 from the roof slope multiplier table which is 1 16.
For example a roof with a pitch of 1 cannot use metal shingles.
If this isn t practical then perform the same measurement on the underside of the roof.
Now divide the rise by the multiplier to get the pitch eg.
Then the roof multiplier is.
The calculator above can handle much of this math.
A roof of pitch 7 12 30 is manageable but caution should be taken.
Why figure what your roof pitch is.
A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof.
Use our roof pitch calculator to find the pitch of your roof.
For example a 4 12 pitch roof that is 100 square feet.
Roof pitch area multipliers.
For roof slopes expressed as x in 12 rise in run the roof pitch multiplier is determined by finding the square root of rise run 1.
A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by the area covered by a sloped roof to produce the area of the actual surface of the roof.
A flat roof has a pitch of 1 meaning the material needed is 1.
100 1 054 105 4ft 2.
Using the pythagorean theorem we find that for every 12 inches the roof spans horizontally there are 13 inches of actual roof.
The first thing that you need to understand before picking any selections from a roof pitch multiplier chart is to ensure that it s affordable.
Roof pitch multiplier 13 over 12 1 08.
So 2400 x 1 12 2 688 2 88 sqs added for pitch.
Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.
