You can use three packs of shingles or four stacks of shingles. This amount will fill a 2000-square-foot roof; you'll need 60 or 80 packs of shingles. The average roll of 15-pound **roofing** felt covers approximately 400 feet 2, or 4 squares, while the average roll of 30-pound roofing felt covers approximately 200 feet 2 or 2 square feet. If your **roof** area is 2000 square feet, you'll need 20 squares of roofing to take up all the space.

It takes three packs of shingles to fill a square of roof, meaning that 60 packs of shingles would be needed to fill 20 squares of roofing. While roofing projects are estimated and sold per square, roofing material is not usually sold in 1-square increments. Calculate the size of your roof and calculate how many packs of shingles, rolls of felt and squares of roofing material you need to build a new roof. To calculate the dimensions of a roof, you must measure the roof as if it were flat, then take into account the roof slope, calculate the square footage, and finally determine how many squares of material are required for the roof.

However, the number of packages a roofing space can accommodate would range from three to four packs of tiles. The calculator above can handle all of this, just enter the length, width and slope, and it will determine the size of the roof in squares. Since 20 roofing squares represent 2000 square feet, you'll need 20 squares of tiles to take up 2000 square feet. You need four packs of these types of shingles to fill a 100-square-foot roof square for cedar shingles.

To know the number of roof squares, you must fill in the square feet of roof; you also need to know the basics of performing such calculations. To get 20, you must divide the total square footage by the size of a roof square: 100 square feet.