How Many Squares Does My Roof Have

Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.

How many squares does my roof have.

1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. This is simply 100 square feet of roof. Thus if your attic is 450 square feet you need roof vents equaling 3 square feet. Estimate the pitch of the roof.

Although roofing projects are estimated and sold by the square roofing material is often not sold in 1 square increments. The answer is the number of roofing squares for the roof. However shingles are packaged in a way that they are light enough for the average person to carry around. They should be divided equally between inlet and outlet vents and they can be used in any combination that will work with your roof s design.

As a general rule your roof needs 1 square foot of vent area for every 150 square feet of attic space. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. For a new roof you will also need the same amount of underlayment. If your roof is flat or has no more than a 3 in 12 pitch you can calculate its total square footage by simply multiplying the length by the width.

Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years. Singles are often sold in bundles with three bundles equaling one roof square. It is often compared to slope but is not exactly the same. Although ceramic tile roofs are expensive they can have a life span of over 100 years.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. Check that your footage measurements are within this range so you can start off on the right foot. Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure. The most common type of shingle called a three tab or strip shingle is generally packaged three bundles per square.

For instance if the roof is 1550 square feet then it is 16 squares. To find the squares divide the overall roof area by 100 and then round up. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. A square simply refers to a 10 x 10 square of roofing.

Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. The result is 240 and this means you would need 240 squares of shingles to cover that roof. 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 to estimate roofing materials.