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Life Span. Asphalt shingles generally last 15 to 30 years, according to U.S. Inspect. Their life span depends on several factors, including shingle weight, roof slope (to shed water), sun exposure, shingle color (light colors absorb less heat and last longer) and climate.How shingles are stacked in storage also matters.ife Span. Asphalt shingles generally last 15 to 30 years, according to U.S. Inspect. Their life span depends on several factors, including shingle weight, roof slope (to shed water), sun exposure, shingle color (light colors absorb less heat and last longer) and climate.
1 Cedar: A cedar roof in need of repair or replacement will split and fall apart in dry climates. In moist climates, it will get mossy. The lifespan of a cedar roof is about 20 years.  Tile: Look for broken or cracked tiles, Bennett says, but don't walk on the roof to do so or the tiles will break.