What Is an Ice Dam?
An ice dam forms when heat from inside a home warms the upper portion of a snowy roof, causing snow to melt. That meltwater flows down the roof slope until it reaches the cold eaves — where the roof overhangs with no heat below it. The water refreezes at the eaves, forming a ridge of ice that blocks further meltwater from draining. Water backs up behind the ice dam, potentially infiltrating under shingles and into the home.
Ice dams also deposit enormous weight on gutters. A 20-foot gutter run full of ice can weigh several hundred pounds — far more than gutters are designed to hold. The result: gutters ripped away from fascia, deformed gutter profiles, and damaged downspouts.
Which Reno-Area Homes Are Most at Risk?
Ice dam risk correlates strongly with:
- Altitude — Incline Village (6,300 ft), Verdi, Cold Springs, and North Valleys get more snowfall and colder temperatures than central Reno
- Poor attic insulation — homes with inadequate insulation lose more heat through the roof deck, warming the upper slopes
- Complex rooflines — valleys, dormers, and lower-pitch sections create natural ice dam formation points
- North-facing slopes — receive less sun to melt ice naturally
Preventing Ice Dam Gutter Damage
Roof Rakes
Removing snow from the lower 3–4 feet of your roof after snowfall eliminates the material that feeds ice dams. Roof rakes (long-handled snow scrapers) are the DIY solution for one-story and accessible two-story sections.
Heat Cables
Self-regulating heat cables installed in a zigzag pattern along the eaves keep a channel melted through the ice dam, allowing water to drain. They're most useful in the worst ice dam zones (gutters, valleys, downspouts).
Attic Insulation and Air Sealing
The root cause fix: properly insulate and air-seal your attic so heat stays in the living space, not the roof deck. This is a building science issue, not a gutter issue — but it's the permanent solution.
Repairing Ice-Damaged Gutters
After a hard winter, inspect your gutters in March for:
- Gutters pulled away from the fascia
- Deformed or flattened gutter profiles
- Crushed or disconnected downspouts
- Damaged fascia board from ice water intrusion
We repair and replace ice-damaged gutters throughout the Reno-Tahoe area each spring. For properties in Incline Village, Verdi, and Cold Springs, we recommend heavy-duty .032" aluminum and commercial-grade hangers spaced on 18" centers to maximize resistance to future ice loads. Schedule a spring inspection or call (775) 502-1844.