How To Estimate Roofing Squares

Roof length measured in feet roof width measured in feet roof pitch.

How to estimate roofing squares.

Divide your square footage by 100 to estimate your materials. This is simply 100 square feet of roof. Dividing the total area of your roof by 100 will therefore help you figure out how many squares worth of shingles to order. If this distance measures 4 inches you have a 4 in 12 pitch.

With that as background you are now ready to estimate how many shingles you will purchase for your roof project. A square simply refers to a 10 x 10 square of roofing. How do you calculate square footage for a roof. If you have a simple gable roof you ll only need to measure and sum up the 2 planes of the roof.

L 30 feet h 12 feet 30 12 2 180 square feet now that the basic concept has been covered let s take a look at a more complex roofing system. Because each 100 square feet of roof is one roofing square divide. In this overhead view you see both a hip end section and gable ends. The first step in a free roofing estimate is measuring the roof dimensions.

There are also 29 standard sized shingles measuring 12 inches by 36 inches in each one of these. Roofing materials are typically packaged in squares each of which is the equivalent of 100 square feet 9 3 m 2 of roof space. Convert the area to roofing squares. Multiply the length by the width to arrive at.

How to estimate roofing materials. You will need to express this size in terms of square feet. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. Measure the length and width of each portion of the roof multiply length by width for each plane and then add the planes together for the total square footage.

Calculating an area of a triangle when estimating a roof in figure above. Although roofing projects are estimated and sold by the square roofing material is often not sold in 1 square increments. Measure the ground dimensions of the house using a tape measure and write down these dimensions. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.

8 inches and you have an 8 in 12 pitch. Find the square footage of the roof. This roof shingle calculator requires four basic inputs. As such while it can be cumbersome measuring the area and pitch of each part of the roof and multiplying by the corresponding correction factor will result in the most accurate estimate of necessary roofing materials.

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.