The answer to 'why is my fascia ice dams' is that ice dams are a common issue that can form on the fascia of a roof, causing water damage and other problems. Ice dams occur when warm air from the attic or roof melts snow on the upper part of the roof, and the melted water then refreezes on the colder edges and gutters, creating a dam that traps more water and leads to leaks.
Common causes of ice dams on the fascia include poor insulation, ventilation issues in the attic, and excessive snow buildup on the roof. Symptoms can include icicles forming on the gutters, water stains or damage on the interior walls and ceilings, and rotting or sagging of the fascia boards. Solutions may involve improving attic insulation, adding roof ventilation, clearing snow from the roof, or installing heat cables to prevent ice dam formation. In some cases, it's best to call a professional roofer to properly diagnose and address the issue.