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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 Longevity -- The average lifespan of an asphalt roof is 15-20 years. A metal roof can last 40-60 years easily before it needs any major attention.  Resale Value -- Replacing your asphalt roof with a metal roof can add $1.45 per square foot to your home's resale value. A typical 1700 square foot roof can add almost $2500 to your sale price. Up to 75%-95% of your cost can be recouped.