How To Figure Out How Many Roofing Shingles I Need

For a new roof you will also need the same amount of underlayment.

How to figure out how many roofing shingles i need.

So in the gable roof example above you need 240 squares of underlayment. To properly calculate how many bundles of shingles are needed to roof your home you need to calculate the total square footage of the roof and convert it to squares. 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. Once you know this number you can estimate the final price of the materials.

You will need to measure the length and height of you roof to calculate how many bundles you need to purchase. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Roof surfaces are measured in squares a square is an area of roof which measures 100 square feet. A square represents 100 square feet of area covered by shingles.

Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry. This means you would need 240 squares of shingles to cover that roof. At this point you will also need to estimate or measure the overhang if you have one. The most common type of shingle called a three tab or strip shingle is generally packaged three bundles per square.

An important part of any roofing repair or replacement project is being able to accurately calculate the quantity of roofing materials required to finish the job. Your roof line is not going to be the same as the square footage in your home. To calculate the size of the roof you need to measure the size of the roof as if it were flat account for roof pitch calculate square footage and finally determine how many squares of material are required for the roof the calculator above can handle all of this simply enter the length width and pitch and it will determine the size of the roof in squares. To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100.

If you have valleys and or dormers you will need to measure and calculate those by adding their sq. The result is 240 and this means you would need 240 squares of shingles to cover that roof. Note that in the last 3 4 years costs of roof shingles and many accessories have gone down by an average of 18 20 currently the us national average for benchmark architectural shingles is around 74 51 square or 25 per bundle. Singles are often sold in bundles with three bundles equaling one roof square.

For example you will need to figure out the exact number of shingles required to cover the entire roof area.