The answer to 'why is my ridge vent leaking' is that there are several common causes, including improper installation, damage, or deterioration of the vent itself. Ridge vents can develop cracks, gaps, or loose seals over time, allowing water to enter the attic space. Symptoms may include water stains on the ceiling, damp insulation, or visible leaks around the ridge vent.
To fix a leaking ridge vent, you may be able to reseal the vent with a high-quality roofing sealant if the damage is minor. However, if the vent is significantly damaged or the installation is flawed, it's best to have a professional roofing contractor inspect and repair or replace the vent to ensure a proper, watertight seal.