How Many Shingles For 12 X 20 Roof

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.

How many shingles for 12 x 20 roof.

X 2 192 in. Roofing material is estimated by the square which is equal to 100 square feet. Length of the roof front to back time 2 edges 96 in. To find the squares divide the overall roof area by 100 and then round up.

A 12 in 12 pitch is a steep 45 degree angle roof. 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. A roof s pitch is determined by how much it rises for every foot it runs. There are also 29 standard sized shingles measuring 12 inches by 36 inches in each one of these.

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. Many homes have an asphalt shingle roof but some have wood metal tile and slate which can be more expensive. Whatever the total square footage is divide that by the coverage for the shingles you select. Divided by single length 36 in.

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. Then multiply that times the length of the roof to get the overall roof area. A square simply refers to a 10 x 10 square of roofing. With that as background you are now ready to estimate how many shingles you will purchase for your roof project.

Most shingles cover 33 3 square feet per bundle. Use 1 4 for up to a 9 12 pitch. Total number of shingles required 14 shingles at 26 shingles per bundle 1 bundle. Multiply the total area determined in step one by a correction factor to account for the roof pitch.

Roof rise times 4 edges 72 in. This correction factor will take into account the greater area of the roof due to the pitch. X 4 288 in. If your roof pitch is 3 12 or 4 12 multiply by 1 25.

X research source calculate your roof pitch to determine how steeply your roof slopes. Thus a moderate 6 in 12 roof pitch means the roof rises 6 inches for every 12 horizontal inches it runs. The average roof is 3 000 square feet or around 30 squares. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.

For roof pitches of 5 12 to 7 12 use a factor of 1 3. I think 185 per square is a decent price to remove and replace shingles. The rise is the distance from the top of a stud wall to the peak of the roof.