Water & Damage
Ice dam forming on the roof edge: what to do?
Ice dam forming on the roof edge: the right reflexes in a few simple steps.
Written by Mohamed IDBRAHIM · Updated octobre 13, 2026 · 7 min read
Immediate actions
- 1 Remove snow from the roof edge with a roof rake.
- 2 Fill a stocking with calcium chloride and lay it across the dam.
- 3 Never chip at the dam with tools.
- 4 Fix attic insulation and ventilation long term.
What not to do / warning
Rock salt damages shingles and plants — use calcium chloride instead.
When a ice dam forming on the roof edge happens, the first minutes matter. Follow these steps to act safely and without panic.
What to do right now
- Remove snow from the roof edge with a roof rake.
- Fill a stocking with calcium chloride and lay it across the dam.
- Never chip at the dam with tools.
- Fix attic insulation and ventilation long term.
Mistakes to avoid
- Acting before removing the immediate source of danger.
- Panicking or skipping the official procedures.
- Following unverified advice from random websites.
How to prevent this in the future
Regular checks, keeping emergency numbers visible and preparing an essentials kit go a long way. Save this guide for offline access.
Frequently asked questions
What should I do first?
Ensure everyone is safe, remove the source of danger, then call the relevant number or begin the official procedure.
When should I call emergency services?
Whenever life, serious injury or fire is involved. When in doubt, call — dispatchers would rather check than miss an emergency.
Sources & references
- FEMA (https://www.ready.gov/winter-weather)