How Do You Determine Square Footage Of A Roof

How do you calculate square footage for a roof.

How do you determine square footage of a roof.

Once you have your roof s pitch divide the number by 12. Include dormers the small outjuttings over attic windows. Convert the area to roofing squares. Because each 100 square feet of roof is one roofing square divide.

Measure the ground dimensions of the house using a tape measure and write down these dimensions. Roof pitch is measured by rise run. The distance from the outside edge of a perimeter stud wall to the center of the house. Given pitch and a horizontal area measurement multiply the horizontal area by a correction factor corresponding to pitch provided in the table below to determine the actual area of the roof to be used in the roofing material calculator.

The lower slope length is measured from outside wall to the start of the upper sloped roof section. Multiply the length and width of each square or rectangle shaped plane. If you don t want to do a lot of measuring you can use your pitch calculation to get an estimated square footage of your roof. This would yield 1 3 next square your result.

How to calculate square feet of a roof. L x w a in square feet to find square feet multiply the length measurement in feet by the width measurement in feet. Apply the square footage formula the next step in how to calculate square footage is to plug your measurements into the square footage formula. Multiply the length by the width to arrive at.

Measure the length and width of every roof plane or surface. For example if your roof s pitch is 4 in 12 you would divide 4 by 12. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Calculate the square footage of a gambrel style roof using imperial measurements.

The distance from the top of a stud wall to the peak of the roof. Depending whether the roof area is measured horizontally possibly from a drawing or photograph a correction factor is necessary to determine the actual area of the roof. Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material. The result is 240 and this means you would need 240 squares of shingles to cover that roof.

To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100.