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What is a Square of Shingles


A Roof’s Shingled Surface Area is Measured in Squares of Shingles


By Mark J. Donovan



When a roofing contractor provides you with a quote on shingling your roof, he will typically tell you how many squares of shingles will be required. For most homeowners this means very little. However it is important to understand this term as it will give you the ability to assess whether the quote is accurate or not.


A square of shingles represents a 10’ x 10’ area (or 100 square feet) of roof surface area. Shingles are sold in bundles and a bundle can weigh between 70 and 140 lbs.


Typically 3 bundles of shingles equal a square of shingles, however depending upon the weight of the particular shingles one square of shingles could equate to 4 or even 5 bundles.


If you plan to shingle your own roof and need to calculate the squares of shingles or number of shingle bundles required, simply measure the roof’s square footage by multiplying the length x width. Then divide this result by 100 to determine the number of squares of shingles required.

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Finally, multiply the squares of shingles result times the number of bundles per square to determine the number of shingle bundles required.


Again, 3 bundles per square is a fairly common conversion factor, however check the packaging on the particular shingles you plan on using to be sure.


If you are planning to install your own roofing shingles make sure to also purchase felt paper, ice and water shield, drip edge, flashing, roofing nails, and ridge vent material.


If this list of roofing material sounds a little daunting keep in mind that the work required shingling a roof is extremely strenuous and dangerous, so make sure you fully think through the idea of installing your own shingles before climbing up on your roof.


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For help on Shingling Your Home's Roof, see HomeAdditionPlus.com’s Asphalt Shingle Roofing Bid Sheet. The Asphalt Shingle Roofing Bid Sheet will help to ensure that your roof won't end up with a blue tarp over it and a dumpster sitting in your yard for weeks as you wait for the roofing contractor to come back and finish roofing your home.

Related Roofing Articles and Asphalt Shingle Roofing Cost Estimator

How to Finance your Roof Project -  can help provide funds for your new home improvement project if financing is required.



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- What is a Square of Shingles -

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