How Many Shingles For 12 X 20 Roof

A 12 in 12 pitch is a steep 45 degree angle roof.

How many shingles for 12 x 20 roof.

Use 1 4 for up to a 9 12 pitch. For roof pitches of 5 12 to 7 12 use a factor of 1 3. 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. Roof rise times 4 edges 72 in.

A square simply refers to a 10 x 10 square of roofing. The average roof is 3 000 square feet or around 30 squares. Many homes have an asphalt shingle roof but some have wood metal tile and slate which can be more expensive. There are also 29 standard sized shingles measuring 12 inches by 36 inches in each one of these.

Multiply the total area determined in step one by a correction factor to account for the roof pitch. X research source calculate your roof pitch to determine how steeply your roof slopes. Whatever the total square footage is divide that by the coverage for the shingles you select. X 4 288 in.

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. X 2 192 in. A roof s pitch is determined by how much it rises for every foot it runs. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.

Thus a moderate 6 in 12 roof pitch means the roof rises 6 inches for every 12 horizontal inches it runs. To find the squares divide the overall roof area by 100 and then round up. The rise is the distance from the top of a stud wall to the peak of the roof. Exposure of 5 inches so you will need to times the number of shingle courses by the number 5 and divide the number by 12 to calculate the measurement of the rakes.

If your roof pitch is 3 12 or 4 12 multiply by 1 25. This is simply 100 square feet of roof. How many bundles of shingles will you need. This correction factor will take into account the greater area of the roof due to the pitch.

Divided by single length 36 in. 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. Total number of shingles required 14 shingles at 26 shingles per bundle 1 bundle.

Then multiply that times the length of the roof to get the overall roof area. Most shingles cover 33 3 square feet per bundle. 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.