Asphalt shingles just ain't what they used to be. The old 20 year asphalt shingle lasted almost 20 years. However, all major shingle manufacturers have significantly changed the way they make their product. Petroleum, the preservative in asphalt, has been dramatically reduced and it has been replaced with fillers such as limestone and paper. Mold and fungus attack limestone and rapid deterioration of this new shingle formula is common. A 30-40 year shingle typically does not last nearly that long.
A metal roofing solution will add beauty and value for the lifetime of your home!