How To Determine How Many Shingles Needed For Roof

Multiply the measurements to determine the total area covered by the roof.

How to determine how many shingles needed for roof.

3 determine the bundles of shingles needed to cover the roof. With that as background you are now ready to estimate how many shingles you will purchase for your roof project. How to figure how many squares are needed for shingles. How many bundles of shingles will you need the average bundle of shingles covers 33 3 ft 2 so three bundles of shingles are needed per square.

Note that in the last 3 4 years costs of roof shingles and many accessories have gone down by an average of 18 20 currently the us national average for benchmark architectural shingles is around 74 51 square or 25 per bundle. Asphalt shingles range in price from about 25 per bundle for a standard 3 tab style to around 50 75 or more for an upgraded architectural style. Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry. Rise 12 enter the coverage of one pack.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. While it is possible to estimate the amount of necessary materials using only the total roof area measurement as can be seen from the table depending how large the pitch of the roof the actual area of the roof can differ by up to 2 236 from the measured total area at a pitch of 24 12. Enter the pitch of the upper roof rise 12 enter the pitch of the lower roof. Measure the length and width of the structure at ground level in feet.

When you are using 3 bundles for a square you will be getting 29 standard shingles in each bundle. If you have an irregularly shaped building break the structure into several rectangles and measure each separately. Divide the total footage by 100 to determine the number of squares in the roof. For regular three tab shingles this would require 320 nails per square for field shingles multiply the number of starter shingles required by 5 to determine the number of nails required to fasten starter course.

Square feet enter a waste factor. The shingle starter strip amount of shingles needed is provided in lineal feet and includes a row of shingles along the rakes. Measure the length and width of each rectangular or square area of the roof and multiply the length times the width to gain the total. To calculate the number of squares or bundles you need you should consider using the measurement method.

Roof length measured in feet roof width measured in feet. It takes 3 bundles to cover a square if you use 3 tab shingles the most common type. Now how about nails. Measure the length of the bottom of any triangular shaped portion of the roof.

Generally you should use four nails per shingle in the field of the roof and 5 nails per starter shingle.