Roofing Shingle Square Dimensions

In roofing terminology a square is 100 square feet.

Roofing shingle square dimensions.

When installing roofing over bare wood roofing felt often called tar paper is laid down first. So in a sense we re talking about square feet but using this unit makes it easier to calculate the footage or required materials and cost of a roofing project. To find the squares divide the overall roof area by 100 and then round up. Widths are random or specified dimension shingles for a few species.

However 39 3 8 inches is the equivalent of one meter. One roofing square is equal to 100 square feet. Find gaf s specifications for timberline hdz here. In the united states available lengths are 16 18 and 24 the length being the vertical side.

Most composition shingles are 3 bundles per square most of the 40yr composition shingles are 4 bundles per square some 5 or more wood shakes 5 bundles per square. Imagine how cumbersome it would be to calculate by the square foot or yard that s a big number convert square feet to roofing squares. Composition shingles asphalt or fiberglass come in bundles that cover 1 3 square. Iko was among the first roofing material manufacturers to introduce the metric size roofing shingle defined as being 13 1 4 inches long by 39 3 8 inches wide.

For instance if the roof is 1550 square feet then it is 16 squares. Roofing comes in rolls 3 feet wide and 36 feet long for a coverage of about 1 square. Regardless of their type or size shingles are sold by the square which is enough material to cover 100 square feet of roof. Square definition a square is the number of shingles it would take to cover 100 square feet of roof area with each row of shingles covering the tabs of the layer below it.

Convert the area to roofing squares. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. This is simply 100 square feet of roof. 5 feet x 20 feet 100 square feet or 1 roofing square 2 feet x 50 feet 100 square feet or 1 roofing square 50 feet x 50 feet 2500 square feet so 2500 100 25 roofing squares.

Yes meets astm d3462 requirements. The answer is the number of roofing squares for the roof. Each plywood sheet is 4 x 8 feet or 32 square feet which coincidentally is almost exactly equivalent to the coverage of one bundle of traditional three tab shingles. Instead a square is a term of measurement all its own.

If it s a re roof project and you have access to the original paperwork from the last shingle installation that may be useful in showing the roof area.