An asphalt roof's lifespan depends on the type of shingles used and factors like installation quality, climate, and maintenance. Three-tab asphalt shingles typically last between 15-20 years, while architectural or laminated asphalt shingles have a longer lifespan, ranging from 25-30 years or more. Proper installation, regular inspections, and timely repairs can help prolong the life of an asphalt roof. Extreme weather conditions or other environmental factors can also impact its durability.

The cost of an asphalt roof per square foot (SF) varies depending on factors like shingle type, material quality, regional labor rates, and removal of old roofing. On average, for material and installation, three-tab asphalt shingles can range from $2.50 to $4.50 per SF, while architectural or laminated shingles may cost between $3.50 and $6.00 per SF. These prices are approximate and subject to change; it is best to consult local contractors for accurate estimates based on your specific needs.