How Do You Find The Area Of A Roof

That gives you 5 590 square feet which is the actual area of the surface of the roof.

How do you find the area of a roof.

This distance is the rise. 1 roof square 100 square feet. Calculating an area of a triangle when estimating a roof. Roof pitch is given as the number of inches in height change over the distance of one foot.

Calculate the square footage of a gambrel style roof using imperial measurements. So if you divide your answer of a product of length times height by two you will get the area of a triangle. The lower slope length is measured from outside wall to the start of the upper sloped roof section. Dividing by 12 gives the ratio of inches in rise per distance.

Calculating the area true once you have your roof s pitch divide the number by 12. Measure the distance from the surface of the roof to the bottom of the level at the 12 inch mark. For example if your measurement is seven inches the rise is expressed as 7 12 in roofing terminology. For example if your roof s pitch is 4 in 12 you would divide 4 by 12.

Pitch measurement method 1. Both metric and imperial measurement systems are displayed in a popup menu over the results area. Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118. Divide your roof pitch by 12.

On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. The calculated area is only an estimation. Take your area result and multiply it by the pitch multiplier or slope correction factor found in the table above to arrive at the roof s surface area. 8 inches and you have an 8 in 12 pitch.

If this distance measures 4 inches you have a 4 in 12 pitch. 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. And that s the number you were looking for. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.

If your number is 1 3 squared would yield 1 9 after that add 1 to your number. The answer is the number of roofing squares for the roof. Convert the area to roofing squares. Now you re ready to price out the materials.

Next square your result.