How Do You Figure Shingles For A Roof

Our calculator will help you estimate the amount of roofing shingles needed for your project plus the cost of materials and accessories.

How do you figure shingles for a roof.

1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. 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. 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. Roof area measured in sq ft number of squares.

How to use roof calculator. Roofing felt is sold by the roll. Measure your roof accurately. You will then have to get the measurement of the rake of the roof.

Measure the pitch of your roof in the attic. Outside of the u s a degree angle is typically used. Divide the total footage by 100 to determine the number of squares in the roof. Singles are often sold in bundles with three bundles equaling one roof square.

A typical bundle of shingles weighs about 75 pounds while some premium products can weigh over 100 pounds per bundle so consider delivery of materials. How many rolls of felt will you need. From the 1 ft 0 30 m spot you marked on the level measure upward to the rafter. The number of squares determines the amount of shingles needed.

Roof type either gable or hip using these four inputs you will get several basic outputs. 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 that as background you are now ready to estimate how many shingles you will purchase for your roof project. It takes 3 bundles to cover a square if you use 3 tab shingles the most common type.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Hold the end you measured from against the bottom of a rafter so it s sticking straight out horizontally and is level. To do this you need to note that one tab will be equal to 1 foot. Enter your zip code.

Use a measuring tape preferably 50 or 100 feet long and get exact ground dimensions of your house. Simply enter your roof dimensions and roof type such as gable or hip and approximate roof pitch. Enter appropriate roof pitch slope. Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30.

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. Roof length measured in feet roof width measured in feet roof pitch. If the existing shingles are standard 3 tab shingles you can get this measurement by taking note of the number of tabs along the eaves and ridges then determine the length in feet. This roof shingle calculator requires four basic inputs.