Most composition roofs last 15 – 30 years depending several factors. How long of a warranty did the shingles come with, how well the shingles were made, and how steep is the roof. (Steeper roofs last longer). Signs that your roof needs replaced are… excessive granule loss that exposes the asphalt, (granules show up at the bottom of your down spouts), shingles blow off during wind storms more frequently, cracked or brittle shingles, curling shingles and a leaking roof.
When should I replace my roof?