Inside the Innovation House

We pulled out all the stops to bring the latest home tech features to our Innovation Home. See the 16 coolest things from the home and be amazed by how smart one home can be.

View Video

Bathroom Countertop Ideas

Good-looking countertops -- whether made of marble, limestone, or concrete -- create high-functioning bathrooms that spill over with style. These popular countertop materials are sure to inspire a bathroom remodel.

View Slideshow

Find Your Dream Backyard

Whether you dream of sunning by a state-of-the-art pool or strolling through a simple cottage garden, there's an outdoor oasis with your name written all over it. Take this quiz to find out where you really belong.

See More

DIY Patio Ideas

Want to boost the beauty and usefulness of your outdoor spaces? Put one of these inspiring DIY patio ideas to work in your landscape.

View Slideshow

Easy Fireplace Upgrades

Does your fireplace need a facelift? Check out these 20 ideas for updating your fireplace with easy-to-apply embellishments and simple-to-make constructions.

View Slideshow

8 Cutting-Edge Exterior Features

The wow-factor of the Innovation Home starts with great curb appeal. See the eight things that make the home's exterior stand out.

View Video

Budget Curb Appeal

Be the best home on the block for less. These budget curb appeal updates will show you how.

View Video
Popular in Home Improvement

Roofing Calculator

Determine the amount of roofing material you'll need with this handy tool.

Size of roof surface,
in square feet
Bundles of composition shingles needed:
Rolls of roll roofing needed:
Rolls of 15-pound felt needed:
Rolls of 30-pound felt needed:

Please note: For your convenience, this calculation has been rounded up slightly.

Important reminder: Every effort has been made to ensure the accuracy of this calculation. But before purchasing materials for any project, please check amounts with your suppliers or contractors.

Helpful Information

Roofing a house is usually a job best left to professionals. Pros often are accustomed to working on sloping high surfaces, can purchase materials cheaply, and have specialized tools to make the job go faster. When dealing with a roofer, it is good to know how much area needs to be covered, and this calculator will enable you to do that.

A few tips: To figure the size of your roof, see our square footage calculator. In roofing terminology, a "square" is 100 square feet. Composition shingles (asphalt or fiberglass) come in bundles that cover 1/3 square. Roofing comes in rolls 3 feet wide and 36 feet long, for a coverage of about 1 square.

When installing roofing over bare wood, roofing felt -- often called tar paper -- is laid down first. A roll of 15-pound felt covers about 4 squares; a roll of thicker 30-pound felt covers 2 squares. When ordering any of these materials, add 15 percent for waste.

Square Footage Calculator


Loading... Please wait...