The answer to 'my roof vent is failing' is that there are several common causes, including clogged vents, damaged flashing, and deterioration of the vent itself. Symptoms may include leaks, poor ventilation, and visible damage to the vent. Solutions can range from simple cleaning and repairs to replacing the entire vent, depending on the severity of the issue.
If the problem is minor, such as a clogged or slightly damaged vent, you may be able to address it yourself with some basic DIY skills. However, for more complex issues or if you're unsure of the cause, it's best to call in a professional roofing contractor. They can properly diagnose the problem and provide the necessary repairs or replacement to ensure your roof is functioning correctly and preventing any further damage.