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.

Measure the length and width of every roof plane or surface. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Once you have your roof s pitch divide the number by 12. Apply the square footage formula the next step in how to calculate square footage is to plug your measurements into the square footage formula.

For example if your roof s pitch is 4 in 12 you would divide 4 by 12. 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. Multiply the length by the width to arrive at. The lower slope length is measured from outside wall to the start of the upper sloped roof section.

The run always remains constant at 12 inches. 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. Include dormers the small outjuttings over attic windows. The result is 240 and this means you would need 240 squares of shingles to cover that roof.

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 distance from the outside edge of a perimeter stud wall to the center of the house. Because each 100 square feet of roof is one roofing square divide. L x w a in square feet to find square feet multiply the length measurement in feet by the width measurement in feet.

Measure the ground dimensions of the house using a tape measure and write down these dimensions. Calculate the square footage of a gambrel style roof using imperial measurements. Convert the area to roofing squares. A square is an area of roof which measures 100 square feet.

Roof pitch is measured by rise run. 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. The distance from the top of a stud wall to the peak of the roof. To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100.

How to calculate square feet of a roof.