Pitch Multiplier For 5 12 Roof

The pitch of the roof is the rise over a 12 inch run.

Pitch multiplier for 5 12 roof. A flat roof has a pitch of 1 meaning the material needed is 1 times the size of the roof. A 12 in 12 pitch is a steep 45 degree angle roof. 100 1 054 105 4ft 2. 800 multiplied by 1 16.

Roof pitch degree table. Divide the rise by the run the run is 12. Roof pitch area multipliers. 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 pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. We included a roof pitch chart below the 7 12 example image and the calculator below that. Find the value of 7 12 from the roof slope multiplier table which is 1 16.

If this isn t practical then perform the same measurement on the underside of the roof. Multiply step 1 and step 2 i e. 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 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. 48 10 4 8.

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. Outside of the u s a degree angle is typically used. Use our roof pitch calculator to find the pitch of your roof. What is the multiplier.

While the slope of the common rafters are expressed as x in 12 the slope of the hip and valley rafter on the same roof will be x in 16 97 so where two roof sections intersect to form a 90 angle a regular hip or valley and each roof. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Based on the pitch you can use the multiplier to determine the amount of material needed for a roofing project. For example a 4 12 pitch roof that is 100 square feet.

The pitch of this roof is 4 8 12. Now divide the rise by the multiplier to get the pitch eg. Roof is 6 12 pitch and measures at 2 400 square feet so 2400 x 1 12 2 688 2 88 sqs added for pitch. The calculator above can handle much of this math.

On a related note the pitch properly the slope of a hip or valley rafter will not be the same as the pitch of the adjacent roof sections. The value arrived at 928 reflects the square feet of the roof. Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.

Multiply 20 and 40 which equals 800.