How Many Squares Of Roofing Do I Need

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.

How many squares of roofing do i need.

To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100. For a new roof you will also need the same amount of underlayment. So in the gable roof example above. For a new roof you will also need the same amount of underlayment.

1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Find the number of squares. 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. There are also 29 standard sized shingles measuring 12 inches by 36 inches in each one of these.

The most common type of shingle called a three tab or strip shingle is generally packaged three bundles per square. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. This means you would need 240 squares of shingles to cover that roof. Roofers measure surfaces in squares of 100 square feet 9 29 square meters.

To determine the number of squares on the gable roof example in this post divide its total of 24 000 square feet by 100 24 000 100 240. Singles are often sold in bundles with three bundles equaling one roof square. The most common type of shingle called a three tab or strip shingle is generally packaged three bundles per square. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.

Roof surfaces are measured in squares a square is an area of roof which measures 100 square feet. Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30. Divide the total footage by 100 to find the number of squares in the roof. 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.

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. However shingles are packaged in a way that they are light enough for the average person to carry around.