The answer to 'why is my gutters ice dams' is that ice dams form when heat escapes from your home and melts snow on your roof, causing water to refreeze in your gutters. This creates a dam that prevents proper drainage and can lead to water damage in your home.
Common causes include poor insulation, ventilation issues, and heat loss through the roof. Symptoms include icicles hanging from the gutters, water backing up under the shingles, and water damage inside the home. Solutions may include improving insulation, sealing air leaks, and installing heat cables or roof rakes to prevent ice dam formation. In severe cases, you may need to call a professional roofer to properly address the underlying issues.