The answer to 'why is my ridge vent ice dams' is that ice dams are a common issue with ridge vents, especially in cold climates. Ice dams form when heat escapes from the home and melts snow on the roof, causing water to refreeze at the roof's edge. This creates a barrier that prevents proper drainage and can lead to water damage inside the home.
Some common causes of ice dams with ridge vents include poor insulation, ventilation issues, and heavy snow accumulation. Symptoms may include icicles hanging from the roof's edge, water stains on ceilings or walls, and even structural damage. To address this, homeowners can try increasing attic insulation, improving roof ventilation, and clearing snow from the roof. However, for more severe or persistent issues, it's best to call a professional roofing contractor to properly diagnose and resolve the problem.