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.

Roof pitch is measured by rise run. Calculate the square footage of a gambrel style roof using imperial measurements. Calculate each plane separately. Multiply the length by the width to arrive at.

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. Because each 100 square feet of roof is one roofing square divide. 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. 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. Measure the length and width of every roof plane or surface. 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 lower slope length is measured from outside wall to the start of the upper sloped roof section. 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. Apply the square footage formula the next step in how to calculate square footage is to plug your measurements into the square footage formula. A square is an area of roof which measures 100 square feet.

The result is 240 and this means you would need 240 squares of shingles to cover that roof. The distance from the top of a stud wall to the peak of the roof. Include dormers the small outjuttings over attic windows. This would yield 1 3 next square your result.

Measure the ground dimensions of the house using a tape measure and write down these dimensions. The run always remains constant at 12 inches. Convert the area to roofing squares. The distance from the outside edge of a perimeter stud wall to the center of the house.

For example if your roof s pitch is 4 in 12 you would divide 4 by 12.