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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.
There are many reasons that a roof can age prematurely, as I've seen them worn out in as little as 12 to 14 years. I do agree a good roof should last anywhere from 20 to 30 years, or possibly longer with the new lifetime shingles. The biggest factor is proper ventilation, and just because you have adequate ventilation at the peak, gables, or towards the top of your roof, does that mean you have the proper airflow through your attic or crawlspace area.