The answer to 'skylight ice dam' is that a skylight ice dam occurs when ice and snow build up around the skylight, preventing proper drainage and causing water to back up under the shingles. This can lead to leaks, water damage, and even structural issues.
Common causes include poor insulation, inadequate ventilation, and heavy snowfall. Symptoms include water stains, peeling paint, and visible ice buildup around the skylight. Solutions may involve adding insulation, improving ventilation, or installing a skylight heating system. In many cases, it's best to call a professional roofer to properly diagnose and resolve the issue.