12 12 Roof Pitch Multiplier

The pitch of this roof is 4 8 12.

12 12 roof pitch multiplier.

Then the roof multiplier is. A 12 12 pitch roof has a pitch angle of 45. What is the multiplier. For example if you measure 4 inches the pitch of your roof is 4 12.

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. For example a roof with a pitch of 1 cannot use metal shingles. 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.

Get your roof size by using this roof pitch calculator. Roof pitch degree table. 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. 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. Helps determine what materials are suitable for your roof. Roof is 6 12 pitch and measures at 2 400 square feet. Image 1 12 to 12 12 roof pitch 7 12 pitch.

48 10 4 8. Find the inverse tangent of the pitch to find the angle in degrees. The calculator above can handle much of this math. Why figure what your roof pitch is.

Multiply 20 and 40 which equals 800. So 2400 x 1 12 2 688 2 88 sqs added for pitch. If the home measures 20 x 40 and has a 7 12 roof then to calculate the slope of the roof follow these steps. If this isn t practical then perform the same measurement on the underside of the roof.

C sqrt 5 2 12 2 sqrt 169 13 in. 800 multiplied by 1 16. The value arrived at 928 reflects the square feet of the roof. To convert between american roofing ratios and pitch degrees follow these steps.

Multiply step 1 and step 2 i e. 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. We included a roof pitch chart below the 7 12 example image and the calculator below that. A flat roof has a pitch of 1 meaning the material needed is 1.

Roof pitch multiplier 13 over 12 1 08. Divide the first part of the ratio by 12 to work out the pitch. Using the pythagorean theorem we find that for every 12 inches the roof spans horizontally there are 13 inches of actual roof.