Why do the warranties differ with Asphalt Shingles?
Asphalt shingles come with warranties that rang from 20 to as much as 45 years, but many professionals are skeptical of those warranties. Warranties have become a marketing device in the roofing industry, they are not a reliable indecator as to how long a roof will last. Instead of using a warranty has a gauge of quality it would be best to judge it by manufactures that meet industry manufacturing standards. (Those links are provided for you above).
