The answer to 'how often to replace roof installation' is that most roofs need to be replaced every 20-25 years, depending on the type of roofing material. Asphalt shingle roofs typically last 15-20 years, while metal, tile, or slate roofs can last 40-50 years or more with proper maintenance. It's important to regularly inspect your roof for signs of wear and tear, such as missing or damaged shingles, and to address any issues promptly to prevent further damage and extend the life of your roof.
The lifespan of a roof can also be affected by factors like the quality of the initial installation, the climate and weather conditions in your area, and the amount of maintenance and repairs the roof has received over the years. If you notice any significant damage or leaks, it's best to consult with a professional roofing contractor to determine if a full roof replacement is necessary.