Roof Multiplier For 12 12 Pitch

Roofers typically refer to it as a pitch and can be found by factoring the rise over a 12 inch run.

Roof multiplier for 12 12 pitch.

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. 800 multiplied by 1 16. 100 1 054 105 4ft 2. So 2400 x 1 12 2 688 2 88 sqs added for pitch.

Using the pythagorean theorem we find that for every 12 inches the roof spans horizontally there are 13 inches of actual roof. The calculator above can handle much of this math. 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.

Roof pitch degree table. C sqrt 5 2 12 2 sqrt 169 13 in. For example a roof with a pitch of 1 cannot use metal shingles. Then the roof multiplier is.

Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area. Multiply step 1 and step 2 i e. Typically the steeper the roof is the higher the price will be. Pitches between 8 12 and 10 12 33 40 are also considered walkable.

For example a 4 12 pitch roof that is 100 square feet. Now divide the rise by the multiplier to get the pitch eg. The pitch of the roof is the rise over a 12 inch run. Helps determine what materials are suitable for your roof.

Roof pitch area multipliers. The pitch of this roof is 4 8 12. Roof is 6 12 pitch and measures at 2 400 square feet. If this isn t practical then perform the same measurement on the underside of the roof.

Find the value of 7 12 from the roof slope multiplier table which is 1 16. Get your roof size by using this roof pitch calculator. Use our roof pitch calculator to find the pitch of your roof. What is the multiplier.

The value arrived at 928 reflects the square feet of the roof. A flat roof has a pitch of 1 meaning the material needed is 1. Why figure what your roof pitch is. 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.

If the home measures 20 x 40 and has a 7 12 roof then to calculate the slope of the roof follow these steps. Image 1 12 to 12 12 roof pitch 7 12 pitch. 48 10 4 8. A roof of pitch 7 12 30 is manageable but caution should be taken.

Multiply 20 and 40 which equals 800.