How To Estimate Number Of Shingles For Roof

A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.

How to estimate number of shingles for roof.

To do this you need to note that one tab will be equal to 1 foot. If this distance measures 4 inches you have a 4 in 12 pitch. However shingles are packaged in a way that they are light enough for the average person to carry around. 3 bundles per square.

8 inches and you have an 8 in 12 pitch. This free roofing calculator estimates the area of a roof and the amount of materials required to replace or build said roof. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square.

On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. Explore a number of housing related calculators as well as hundreds of other calculators covering topics such as finance math health fitness and more. 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. Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry.

Compute the area of the whole roof and determine the number of bundles. 100 sq ft 21 shingles per bundle. You will then have to get the measurement of the rake of the roof. Also have a couple of bundles spare on hand to cover wind damage etc.

To estimate roofing materials start by finding the total square footage of the roof and divide the number by 100 to determine the number of squares in the roof. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. 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. Be sure to add a couple of bundles for double first row and capping.

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. If the existing shingles are standard 3 tab shingles you can get this measurement by taking note of the number of tabs along the eaves and ridges then determine the length in feet.