Making Use of and Maintaining Your Asphalt Shingles
Asphalt shingles are one of the most preferred types of roofing materials in North America and have been used for more than 150 years. They are made of a mat of organic materials, usually cellulose or fiberglass, that is coated with asphalt and then covered with a mineral granule. Asphalt shingles are available in a variety of colors and styles