The answer to 'how long does roof replacement last' is that a properly installed and maintained roof can last between 20-50 years, depending on the roofing material. Asphalt shingles typically last 20-25 years, while metal, tile, and slate roofs can last 40-50 years with proper care. The lifespan of a roof depends on factors like climate, roof slope, ventilation, and the quality of the original installation.
Regular roof inspections and timely repairs can help extend the life of your roof. It's generally recommended to replace your roof when it reaches the end of its expected lifespan or shows significant signs of wear and tear, such as missing or damaged shingles, leaks, or sagging.