The answer to 'when to replace roof vent' is that roof vents typically need to be replaced every 10-15 years, or when they show signs of wear and tear like cracking, leaking, or damage. Roof vents play a critical role in maintaining proper attic ventilation, which helps prevent moisture buildup, mold growth, and premature roof deterioration. Over time, the materials in roof vents can degrade due to weather exposure, and they may become less effective at their job.
If you notice any issues with your roof vents, such as leaks, cracks, or deterioration, it's a good idea to have them inspected by a professional roofing contractor. They can assess the condition of the vents and recommend whether they need to be repaired or replaced. Regular roof inspections can also help identify any problems with the vents before they become more serious.