How Many Squares Of Roofing Do I Need

Divide the total footage by 100 to find the number of squares in the roof.

How many squares of roofing do i need.

There are also 29 standard sized shingles measuring 12 inches by 36 inches in each one of these. 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. So in the gable roof example above. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.

Roofers measure surfaces in squares of 100 square feet 9 29 square meters. The most common type of shingle called a three tab or strip shingle is generally packaged three bundles per square. The result is 240 and this means you would need 240 squares of shingles to cover that roof. For a new roof you will also need the same amount of underlayment.

To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100. However shingles are packaged in a way that they are light enough for the average person to carry around. Roof surfaces are measured in squares a square is an area of roof which measures 100 square feet. The number of squares determines the amount of shingles needed.

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. Find the number of squares. Singles are often sold in bundles with three bundles equaling one roof square. How many rolls of felt will you need roofing felt is sold by the roll.

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. 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. A roofing square is equal to 100 square feet of the roof.

The most common type of shingle called a three tab or strip shingle is generally packaged three bundles per square. This means you would need 240 squares of shingles to cover that roof. 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.