How Do You Find The Area Of A Roof

Dividing by 12 gives the ratio of inches in rise per distance.

How do you find the area of a roof.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. The length l times the height h of a triangle is twice its area a2. In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area. That gives you 5 590 square feet which is the actual area of the surface of the roof.

Calculating an area of a triangle when estimating a roof. 1 roof square 100 square feet. The calculated area is only an estimation. Calculating the area true once you have your roof s pitch divide the number by 12.

This applies to lengths as well as areas. If this distance measures 4 inches you have a 4 in 12 pitch. If your number is 1 3 squared would yield 1 9 after that add 1 to your number. And that s the number you were looking for.

The lower slope length is measured from outside wall to the start of the upper sloped roof section. The answer is the number of roofing squares for the roof. Pitch measurement method 1. 8 inches and you have an 8 in 12 pitch.

Convert the area to roofing squares. 1 9 1. Now you re ready to price out the materials. Roof pitch is given as the number of inches in height change over the distance of one foot.

Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118. This distance is the rise. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. For example if your measurement is seven inches the rise is expressed as 7 12 in roofing terminology.

Both metric and imperial measurement systems are displayed in a popup menu over the results area. Divide your roof pitch by 12. For example if your roof s pitch is 4 in 12 you would divide 4 by 12. Next square your result.

Measure the distance from the surface of the roof to the bottom of the level at the 12 inch mark.