What Is an Ice Dam?
An ice dam forms when heat escaping from your home melts snow on the roof. The water runs down to the cold eaves (overhang) where it refreezes, creating a dam. As more water backs up behind the dam, it seeps under shingles and into your home.
⚠️ Average Ice Dam Damage in Boise: $5,000 - $15,000
- • Water-stained ceilings and walls
- • Mold growth in attic and walls
- • Damaged insulation (loses R-value when wet)
- • Ruined gutters and fascia boards
- • Rotting roof sheathing
Why Boise Is Especially Vulnerable
Boise's climate creates perfect ice dam conditions:
Daily temperature swings repeatedly melt and refreeze
Enough to create problems, especially in Foothills
Sunny days warm roofs, nights refreeze everything
Highest Risk Areas: North End (older homes with less insulation), Boise Foothills (heavy snow, steep roofs), and any home with poor attic ventilation.
Ice Dam Prevention Methods Compared
Heat Cables
Self-regulating cables prevent ice formation at roof edge
Attic Insulation
Reduces heat loss that causes uneven snowmelt
Roof Ventilation
Balances attic temperature with outside air
Gutter Guards
Prevents debris seed points, improves flow
Snow Rake
Manually remove snow before it melts/refreezes
Heat Cables: Boise's Best Solution
For most Boise homes, self-regulating heat cables are the most effective and cost-efficient solution:
Why Heat Cables Work Best in Boise:
- ✓ Self-regulating technology — automatically adjusts heat output based on temperature
- ✓ Targets the problem zone — heats exactly where ice dams form
- ✓ Energy efficient — only uses power when needed (10-15 watts/ft)
- ✓ One-time installation — lasts 15-20+ years
- ✓ Works with existing gutters — can be added to any home
Heat Cable Installation Cost in Boise:
| Home Size | Linear Feet | Installed Cost |
|---|---|---|
| Small (1,200-1,800 sq ft) | 50-75 ft | $800-1,200 |
| Medium (1,800-2,500 sq ft) | 75-100 ft | $1,200-1,800 |
| Large (2,500-3,500 sq ft) | 100-150 ft | $1,800-2,500 |
Have an Ice Dam Right Now? Here's What to Do
🚨 Emergency Steps:
- 1. Don't chip at it — You'll damage your roof and gutters
- 2. Create drainage channels — Use calcium chloride (NOT rock salt) in pantyhose, lay across dam
- 3. Remove interior water — Place buckets, use fans to dry wet areas
- 4. Call a professional — Steam removal is the safest method
- 5. Document damage — Take photos for insurance
Important: Never use a pressure washer, heat gun, or open flame on ice dams. These can damage your roof or cause fires.