How To Figure Out Square Foot Of A Roof

Take the square foot of 5 128 divide by 100 100 sq ft is equal to one square so you have 51 28.

How to figure out square foot of a roof.

Add a square for waste so you will need 157 bundles. For instance if the roof is 1550 square feet then it is 16 squares. The first step in a free roofing estimate is measuring the roof dimensions. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.

Calculate each plane separately. However shingles are packaged in a way that they are light enough for the average person to carry around. How to calculate square feet of a roof. Outside of the u s a degree angle is typically used.

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. 8 inches and you have an 8 in 12 pitch. To find the squares divide the overall roof area by 100 and then round up. Pitch measurement method 1.

If the house has an irregular shape measure each part separately figure the separate areas and add them together. Multiply the length and width of each square or rectangle shaped plane. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. 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.

Multiply the length by the width to arrive at the ground area of the house. Measure the length and width of every roof plane or surface. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. L 30 feet h 12 feet 30 12 2 180 square feet.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. In this overhead view you see both a hip end section and gable ends. It takes 3 bundles per square so you will multiply 51 28 by 3 and you will get 153 84. Include dormers the small outjuttings over attic windows.

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. A square simply refers to a 10 x 10 square of roofing. You will need to express this size in terms of square feet. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.

With a more complex roof such is this one it is highly recommended that you make a basic sketch.