Roof Area Pitch Factor

The formula for the roof pitch multiplier comes from the formula for a right triangle and more specifically the pythagorean theorem.

Roof area pitch factor.

Feet the area of a hip roof equals the area of a gable roof with the same dimensions. The roof pitch conversion factor is a number that when multiplied by the area covered by the roof gives an estimate the total surface area of the sloped roof itself. 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 you do not wish to climb on the roof to calculate roof pitch then use a ladder.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. A 12 in 12 pitch is a steep 45 degree angle roof. 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 gives the actual area of the roof. You can calculate roof pitch from the rafter tail bottom or at a barge rafter at the gable end on the roof over hangs.

What is the roof pitch factor. From the roof pitch factor table note down the roof pitch conversion factor corresponding to the roof pitch calculated. For example if you measure 4 inches the pitch of your roof is 4 12. The maths behind this number is that it is the square root of rise run 2 1.

Adding 1 gives us 1 1 9 10 9 then taking the square root gives us about 1 0541. 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. Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used. How roof area is calculated.

The roof pitch can also be determined by staying. Add 1 then take the square root. Then multiply the square footage with the roof pitch factor to get the total area of the roof. Enter 6 into the calculator slope factor 1 1180 multiply the roof length by the gable wall length 40 24 960 multiply this amount by the slope factor 960 1 1180 1073 28 the area of this roof 1073 3 sq.

The procedure to follow is the same. It affects walkability as well as drainage and roofs in areas of high rain or snowfall tend to have steeper pitches. So keeping with our roof pitch of 4 this gives us 1 9. It is sometimes called the roof pitch multiplier.

This nominal square footage amount is then multiplied by a factor associated with the roof s pitch. This will give you the rise over run or pitch. Roof pitch affects the actual area of the roof.