How Many Shingles For 12 X 20 Roof

Many homes have an asphalt shingle roof but some have wood metal tile and slate which can be more expensive.

How many shingles for 12 x 20 roof.

For roof pitches of 5 12 to 7 12 use a factor of 1 3. Whatever the total square footage is divide that by the coverage for the shingles you select. A roof s pitch is determined by how much it rises for every foot it runs. If you ve already done that and the 12 x 14 is the actual roof area you re all set with a roof area of 168 square feet.

Total number of shingles required 14 shingles at 26 shingles per bundle 1 bundle. Use 1 4 for up to a 9 12 pitch. X 2 192 in. X research source calculate your roof pitch to determine how steeply your roof slopes.

The rise is the distance from the top of a stud wall to the peak of the roof. Roof rise times 4 edges 72 in. A square simply refers to a 10 x 10 square of roofing. This correction factor will take into account the greater area of the roof due to the pitch.

There are also 29 standard sized shingles measuring 12 inches by 36 inches in each one of these. Then multiply that times the length of the roof to get the overall roof area. Most shingles cover 33 3 square feet per bundle. Multiply the total area determined in step one by a correction factor to account for the roof pitch.

Roofing material is estimated by the square which is equal to 100 square feet. For example you may need to pay double the cost in asphalt shingles if your roof has a 12 12 pitch a rise of 12 inches 30 cm per 1 foot 0 30 m as opposed to a 4 12 pitch. This is simply 100 square feet of roof. With that as background you are now ready to estimate how many shingles you will purchase for your roof project.

Roofing is sold in 100 square foot lots so you need 21 squares of shingles and 2 100 square feet of 15 pound 15 felt paper and about 50 pounds of galvanized roofing nails. If your roof pitch is 3 12 or 4 12 multiply by 1 25. I think 185 per square is a decent price to remove and replace shingles. Length of the roof front to back time 2 edges 96 in.

How many bundles of shingles will you need. To find the squares divide the overall roof area by 100 and then round up. Once you have these measurements you will need to calculate the area of the roof and then you can see how many shingles you will need. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.

The average roof is 3 000 square feet or around 30 squares. X 4 288 in. Divided by single length 36 in.