How Many Squares Of Roofing Do I Need

The average roll of 15 pound roofing felt covers about 400 ft 2 or 4 squares while the average roll of 30 pound roofing felt covers about 200 ft 2 or 2 squares.

How many squares of roofing do i need. Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. However shingles are packaged in a way that they are light enough for the average person to carry around. Roofers measure surfaces in squares of 100 square feet 9 29 square meters.

Roof surfaces are measured in squares a square is an area of roof which measures 100 square feet. This means you would need 240 squares of shingles to cover that roof. How many rolls of felt will you need roofing felt is sold by the roll. The result is 240 and this means you would need 240 squares of shingles to cover that roof.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. The most common type of shingle called a three tab or strip shingle is generally packaged three bundles per square. While it is possible to estimate the amount of necessary materials using only the total roof area measurement as can be seen from the table depending how large the pitch of the roof the actual area of the roof can differ by up to 2 236 from the measured total area at a pitch of 24 12. To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100.

The most common type of shingle called a three tab or strip shingle is generally packaged three bundles per square. A roofing square is equal to 100 square feet of the roof. So in the gable roof example above. Find the number of squares.

Singles are often sold in bundles with three bundles equaling one roof square. Divide the total footage by 100 to find the number of squares in the roof. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. The number of squares determines the amount of shingles needed.

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. When figuring the amount of shingles needed to roof a house you first convert the total square footage of the roof to squares a square represents 100 square feet of area covered by shingles. For a new roof you will also need the same amount of underlayment.