Asphalt shingles are the most commonly used type of roof covering for pitched roofs on homes. The overlapping design of the installed shingles provides a double layer of protection as the water flows down the roof slope to the roof edge. Asphalt shingles, also known as composition shingles, are so widely used because of their moderate cost, light weight (compared to many other roofing products), durability, and ease of installation. Asphalt shingles are surfaced on the top side with mineral granules to provide protection from the elements and a level of fire resistance. Asphalt shingles are available in a variety of colors, weights and patterns. Regular weight asphalt shingles generally have an economic life span of 16-20 years; heavyweight shingles are sold as 30-40 year shingles. Roo...
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