Generally there is 1/3 of 1 square per bundle but this varies with style and manufacturer. a square covers 100 square feet of roof so 1 bundle would be roughly 33 square feet.
70 pounds
Depends is the shingles are 3 bundle or 4 bundle to a Square (100 sq ft.) This information can be found on the shingle wrapper. To determine how many bundle of shingles you need measure the width and length of your roof to the nearest foot. Use this formula to determine area Length x width= area . For example: one side for your roof from peak to eve measures 17' and from rake to rake measures 50' . 17 x 50= 850 since there are two sides of a roof multiply by 2 = 1700 Sq. foot. Now divide by 100 since there are 100 sq foot in one Square. =17 square. Now multiply the number of Square by the number of bundles required to cover one Square 17 x 3 = 51 bundle of shingle. Other tips, one bundle of 3-tab shingles will cover about 25 lineal feet when used for cap.
26 shingles in a bundle of three tab asphalt shingles
21
Three bundles per square
Usually 4 that information should be on the bundle
About 80 lbs.
A bundle of shingles weigh ~ 80lbs, so it depends if you are using 3-tab or architectual shingles. There are usually 22 shingles in a bundle of arch. and 26 in a bundle of 3-tab. Doing the division and arch shingle weighs ~3.63 lbs and a 3-tab weighs ~3.08lbs. The weight will very depending on the brand and style of shingle as well... Hope that helps you...
each bundle does 33.3 sq ft.
what is the weight of a sq of 3 tab and a sq of arutectural shingles
With a 'three tab' shingle, you should (will?) have 33 sq. ft. per bundle, so you will need 10-11bundles.If a 'designer' shingle is used, you should (will?) have 25 sq. ft. per bundle, so you will need 13-14 bundles.You may need an extra bundle or two, depending on the shape of your roof & how many full size shingles must be cut to fit.If you have to shingle the ridge of the roof, you should get 21 Lft. per bundleCall or visit your local building supply store, ask for their 'Service Counter' or Project Desk' to verify the shingles ( colour, style, size & size per bundle ) that they have in stock or have access to.Styles & sizes vary by geographic location.