Asphalt Roof Lifespan
The lifespan of asphalt shingles depends highly upon the environment. Shingles in cooler climates seem to last longer than those installed in warmer climates. Studies have shown that the average lifespan of a 20-year shingle in Phoenix, Arizona, is around 14 years. In Minneapolis, Minnesota, the lifespan was 19.5 years. And in Reading, Pennsylvania, the lifespan was 20.8 years. From this data, it seems obvious the hotter the environment, the shorter the service life of asphalt shingles.