12 12 Roof Pitch Multiplier

Then the roof multiplier is.

12 12 roof pitch multiplier. What is the multiplier. Roof pitch multiplier 13 over 12 1 08. We included a roof pitch chart below the 7 12 example image and the calculator below that. Get your roof size by using this roof pitch calculator.

For example a roof with a pitch of 1 cannot use metal shingles. 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. Once you know the roof slope multiplier for a particular slope you can use it to find the actual area of any size sloped roof with the same slope. Now divide the rise by the multiplier to get the pitch eg.

Find the inverse tangent of the pitch to find the angle in degrees. Roof pitch degree table. The pitch of this roof is 4 8 12. Roof is 6 12 pitch and measures at 2 400 square feet.

So in this case for every 12 inches the roof goes across horizontally b while rising 6 inches a there s actually 13 416 inches of roof c. A flat roof has a pitch of 1 meaning the material needed is 1. For example if you measure 4 inches the pitch of your roof is 4 12. Multiply 20 and 40 which equals 800.

Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter. A 12 12 pitch roof has a pitch angle of 45. Image 1 12 to 12 12 roof pitch 7 12 pitch. If this isn t practical then perform the same measurement on the underside of the roof.

48 10 4 8. Why figure what your roof pitch is. Multiply step 1 and step 2 i e. Using the pythagorean theorem we find that for every 12 inches the roof spans horizontally there are 13 inches of actual roof.

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. The calculator above can handle much of this math. Find the value of 7 12 from the roof slope multiplier table which is 1 16. This will give you the rise over run or pitch.

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. 800 multiplied by 1 16. To convert between american roofing ratios and pitch degrees follow these steps. C sqrt 5 2 12 2 sqrt 169 13 in.

Helps determine what materials are suitable for your roof. So 2400 x 1 12 2 688 2 88 sqs added for pitch. Roofers typically refer to it as a pitch and can be found by factoring the rise over a 12 inch run.