The answer to 'skylight ice dam' is that an ice dam is a buildup of ice at the edge of a roof that can prevent proper drainage and lead to water leaks, especially around skylights. Common causes include poor insulation, ventilation issues, and heavy snowfall. Symptoms include icicles, water stains, and damage to the skylight or surrounding areas.
To address a skylight ice dam, you can try DIY solutions like clearing snow and ice, improving insulation, or installing heat cables. However, for complex issues or significant damage, it's best to call a professional roofing contractor who can properly diagnose and fix the problem.