For a 2000 square foot home footprint, you will need approximately 26 squares or 78 packs or 2262 pieces of standard-size 3-tab shingles (26 × 3 %3D 78 packs) to cover the roof. So, to cover the roof of a 2000 square foot house, you would need 78 packs of shingles. You'll need one to two shingles per square foot, depending on the type and size of shingle you choose. As stated, one package will cover approximately 33 square feet of roof regardless of type, so the question is not how many shingles you need (because they come in different sizes) but how many packs of shingles you need.
Just take the total square footage and divide them by 33 to get that answer. How many shingles do I need to protect my roof? The surface area of your roof will affect the number of packages or squares you need. A 2,000 square foot roof requires 20 squares or 60 packages. The surface area of your roof will affect the number of packages or squares you need.
Although roofing projects are estimated and sold by the square, roofing material is often not sold in increments of 1 square. Calculating the amount of shingles you need for your roof is very similar to calculating how much carpet you need for your floors or how much wallpaper you need for your walls; simply determine the ceiling area and divide by the area covered by each pack of shingles. The most accurate way to calculate how many packs of shingles you will need is to climb onto the roof and measure each plane of the roof. Steeper roofs generally require more shingles to properly cover the area, which means a more expensive roofing bill.
For example, a very steep roof in a 1,000 square foot attic will need more shingles than a lower pitched roof in the same size attic. For a gable roof that is easy to raise and return, you'll multiply the roof footprint by 1.3 to get the square feet of your roof. Some special styles of asphalt shingles that are larger or thicker may require 4 packs per square, but the vast majority of roof shingles are three packs to cover 100 square feet of roof. Calculate the size of your roof and estimate how many packs of shingles, felt rolls and squares of roofing material you need for a new roof.
The average roll of 15-pound roofing felt covers approximately 400 ft2, or 4 square, while the average roll of 30-pound roofing felt covers approximately 200 ft2, or 2 square. Complex roofs especially require additional shingles to be cut to accommodate complicated roof edges and corners.