How To Estimate Number Of Shingles For Roof

Compute the area of the whole roof and determine the number of bundles.

How to estimate number of shingles for roof.

Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square. 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. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry. 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. Then add 10 to the number to account for waste.

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. 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.

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. Also have a couple of bundles spare on hand to cover wind damage etc. 8 inches and you have an 8 in 12 pitch. 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.

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. This free roofing calculator estimates the area of a roof and the amount of materials required to replace or build said roof. 33 square feet per bundle 100 square feet per square 4 nails per shingle. Be sure to add a couple of bundles for double first row and capping.

You will then have to get the measurement of the rake of the roof. 3 bundles per square.