What is the best way to remove ice dams?
Immediate Removal
If you have an ice dam, the goal is to create a channel for water to drain. Fill a leg of pantyhose with calcium chloride ice melt (not rock salt, which can damage shingles and plants) and lay it vertically across the dam. It will melt a channel. You can also use a roof rake with an extension handle to pull snow off the roof from the ground. Never climb on a snowy or icy roof.
For severe dams, hire a professional ice dam removal service. They use steamers that melt ice safely without damaging the roof. Expect to pay $300–$600 or more, depending on roof size and accessibility.
Long-Term Prevention
Ice dams form when heat escapes into the attic, warms the roof, and melts snow that refreezes at the eaves. The fix is to seal air leaks, add insulation, and improve attic ventilation. Keep gutters clean and consider installing a metal roof or ice-and-water shield under shingles. In some cases, heat cables can help, but they're not a substitute for proper insulation.
After the ice is gone, check for water damage inside. Look for stains on ceilings and walls, and inspect the attic for wet insulation. Repair any damage promptly to prevent mold.
- Use calcium chloride in pantyhose for a melt channel.
- Use a roof rake from the ground to remove snow.
- Never chip ice with sharp tools.
- Improve attic insulation and ventilation.
- Hire a pro for severe dams.
Safety Warnings
Falling ice and snow can be deadly. Keep people and pets away from the area below. Never use a ladder on snow or ice. Avoid using salt or de-icing chemicals that can damage roofing, siding, and landscaping. If you're unsure, call a professional.
Common mistakes
- Using rock salt; it can damage shingles, metal gutters, and plants.
- Trying to chop ice with an axe or hammer; you can puncture the roof.
- Ignoring the root cause; ice dams will return until attic insulation and ventilation are fixed.
