How To Figure Roof Shingle Coverage

Determine the bundles of shingles.

How to figure roof shingle coverage.

100 1 054 105 4ft 2. A square of shingles will be the amount needed to cover an area of 100 square feet. For example if brand a has 20 shingles in a package but brand b has 26 it could be that the brand a bundle covers more area. 33 square feet per bundle 100 square feet per square 4 nails per shingle.

Measure your roof accurately use a measuring tape preferably 50 or 100 feet long and get exact ground dimensions of your house. Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.

Place the end hook of the tape on the corner and run it all the way to the opposite corner of the house. Use our roof pitch calculator to find the pitch of your roof. Measure both the width gable side and the length eave gutter side. Determine the total number of squares.

100 sq ft 21 shingles per bundle. The key dimension you need to look at is the area covered per bundle. Also have a couple of bundles spare on hand to cover wind damage etc. You can t merely go by the number of shingles in a bundle since shingle size and coverage vary from one brand to the next.

A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. Shingles are packaged in paper or plastic wrapped bundles designed to be light enough for a person to carry so heavier shingles require more bundles per square. Be sure to add a couple of bundles for double first row and capping. The shingle bundles will be plastic or paper wrapped bundles that are made to be light enough for a single person to carry.

3 bundles per square. Measure the length and width of each portion of the roof multiply length by. Compute the area of the whole roof and determine the number of bundles. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.

Find the square footage of the roof. The pitch of the roof is the rise over a 12 inch run. To accurately calculate the area of your roof you must first determine its slope or pitch. For example a 4 12 pitch roof that is 100 square feet.

How shingle quantities are measured roof shingles are sold by both the bundle and by the square. Divide the total footage by 100 to determine the number of squares in the. Roof pitch area multipliers.