Pitched Roof Area Formula

These roofs have a pitch less than 4 12.

Pitched roof area formula.

Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. For example if your roof s pitch is 4 in 12 you would divide 4 by 12. Image 1 12 to 12 12 roof pitch 7 12 pitch. Calculating the area true if you want to get the exact area measurement for your roof you can 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. Roof pitch degree table. The roof area for a hip end is the same as for a gable end the intersection is equivalent to a hip slightly conservative so there is usually no need to consider triangles when measuring a roof. Adding 1 gives us 1 1 9 10 9 then taking the square root gives us about 1 0541.

Roof pitch is used to describe the slope or angle of the roof. The incline or pitch of a roof can be easily measured with a level tape measure and a pencil. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. 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.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. It affects walkability as well as drainage and roofs in areas of high rain or snowfall tend to have steeper pitches. The maths behind this number is that it is the square root of rise run 2 1. Once you have your roof s pitch divide the number by 12.

If your number is 1 3 squared would yield 1 9. The roof area is simply 114x18x2 plus 30x18x2 giving 5184 square feet which is perfectly adequate for estimating materials. Conventional roofs are the easiest to construct and you can walk on them safely. To accurately calculate the area of your roof you must first determine its slope or pitch.

So keeping with our roof pitch of 4 this gives us 1 9. Add 1 then take the square root. Therefore mark off 12 inches on the level and place it down horizontally against the roof rafter. Watch this short video titled area of a roof instead.

They have a pitch ranging from 4 12 to 9 12. This would yield 1 3 next square your result. The roof s pitch is the number of inches the roof rises in 12 inches. High pitched roofs often need extra fasteners and their pitch can be as high as 21 12.

Roof pitch affects the actual area of the roof.