The answer to 'how long does roof installation last' is that a properly installed roof can last 20-30 years or more with proper maintenance. Asphalt shingle roofs typically have a lifespan of 15-30 years, while metal and tile roofs can last 40-70 years. The actual lifespan depends on factors like climate, roof slope, material quality, and maintenance.
Regular inspections and minor repairs can help extend the life of your roof. Things like replacing worn shingles, clearing debris, and fixing leaks will prevent more extensive damage down the line. Calling in a professional roofer for an inspection every 3-5 years is recommended to identify and address any issues early.