The answer to 'when to replace roof inspection' is that you should have your roof inspected regularly, typically every 1-2 years, to determine if and when it needs to be replaced. A professional roofing contractor can perform a thorough inspection to assess the condition of your roof, looking for signs of wear, damage, or deterioration that may indicate it's time for a replacement.
The lifespan of a roof can vary depending on the type of roofing material, the climate, and how well the roof has been maintained. On average, asphalt shingle roofs last 15-20 years, while metal, tile, or slate roofs can last 40-50 years or more with proper care. Regular inspections help you stay ahead of potential issues and make informed decisions about roof replacement before more extensive and costly repairs are needed.