The answer to 'when to replace ridge vent' is that you should typically replace your ridge vent every 10-15 years, or sooner if it shows signs of wear and tear. Ridge vents are an important part of your roof's ventilation system, helping to regulate temperature and humidity in your attic. Over time, the materials can become damaged or deteriorate, reducing their effectiveness.
Some common signs that it's time to replace your ridge vent include cracked, warped, or missing pieces, as well as excessive leaks or water damage. If your ridge vent is more than 10 years old and you notice any of these issues, it's a good idea to have a professional roofing contractor inspect it and determine if replacement is necessary.