Number Of Shingles Needed To Cover Roof

Calculate how many metal roofing panels are needed to cover a roof.

Number of shingles needed to cover roof.

A roofing square is equal to 100 square feet of the roof. Then add 10 to the number to account for waste. Multiply the number of squares needed by the applicable amount of bundles needed to cover a square to obtain the number of bundles needed to cover the roof. For example a very steep roof on a 1 000 square foot attic will need more shingles than a lower sloped roof on the same sized attic.

To estimate roofing materials start by finding the total square footage of the roof and divide the number by 100 to determine the number of squares in the roof. Re roofing may affect the warranty on the new shingles. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. Your roofer will know that steeper roofs use more shingles than lower sloped roofs for the same house size and there are established slope multiplier factors to make this calculation simple see table below.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. Two layers is the maximum in most areas but some building codes allow only one. Roof pitch calculator. The shingle bundles will be plastic or paper wrapped bundles that are made to be light enough for a single person to carry.

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. The average bundle of shingles covers 33 3 ft 2 so three bundles of shingles are needed per square. Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square. Roof surfaces are measured in squares a square is an area of roof which measures 100 square feet.

To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100. This means that if you are going to be using heavier shingles you will need to have more bundles to cover each square foot. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Asphalt shingles range in price from about 25 per bundle for a standard 3 tab style to around 50 75 or more for an upgraded architectural style.

The result is 240 and this means you would need 240 squares of shingles to cover that roof. Be sure to check with the shingle manufacturer regarding all warranty issues and installation requirements before re roofing. Local codes might not allow re roofing. Tip purchase 10 percent more shingles than needed to roof the house to allow for damage and other mistakes.

Roof surfaces are measured in squares. 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.