The answer to 'why is my ridge vent ice dams' is that ice dams are a common problem that can occur when heat escapes from the home and melts snow on the roof, causing water to refreeze at the roof's edge. This can lead to a buildup of ice that blocks the ridge vent, preventing proper ventilation and airflow. This can cause further issues like water damage, mold, and even structural problems.
Some common causes of ridge vent ice dams include poor insulation, air leaks in the home, and inadequate ventilation. Symptoms may include visible icicles, water stains on the ceiling, and ice buildup around the edges of the roof. To fix this, homeowners may need to improve insulation, seal air leaks, and ensure proper ventilation. In some cases, it's best to call a professional roofing contractor to assess the issue and provide the appropriate solution.