The answer to 'ridge vent water stains' is that they are often caused by improper installation, damage, or poor ventilation. Symptoms may include discoloration, leaks, and even mold growth around the ridge vent. Solutions can range from simple repairs to replacing the entire vent system.
If the stains are minor and the vent is still functioning properly, you may be able to clean and reseal the area yourself. However, more significant issues like structural damage or persistent leaks likely require the expertise of a professional roofing contractor to diagnose and fix the problem correctly.