What is the expected lifespan of asphalt shingle (architectural) roofing?

The expected lifespan of architectural asphalt shingles is generally around 30 years. These shingles are designed to be more durable and weather-resistant than traditional three-tab asphalt shingles. The high-quality materials used in architectural shingles, such as the thicker profile and added granules, contribute to their longevity. Additionally, factors like proper installation, maintenance, climate conditions, and ventilation can influence their actual lifespan, but under typical conditions, 30 years is a reasonable estimate for their durability and effectiveness. This is why the answer indicating a 30-year lifespan aligns well with industry standards and is considered correct.