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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.
In light of regional climates, Roofhelp.com reports that the average life span for shingle roofs with a 20-year warranty in Phoenix, Arizona, is approximately 14 years, in Minneapolis, Minnesota, approximately 19.5 years and in Reading, Pennsylvania, approximately 20.8 years.