What do ice dams on your roof cost?
Updated August 2026
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An ice dam that traps meltwater at your eaves turns a single cold snap into $1,500 to $10,000 of soaked drywall, insulation, and framing, on top of $300–600 every time a crew steam-chips the ice back off. The dam forms when heat escaping into the attic melts the snow up high, the water runs down to the cold overhang, and it refreezes into a ridge that backs the next melt up under your shingles and into the house. Chipping or steaming the ice only buys a week; the same warm attic builds another dam after the next storm. The lasting fix, air-sealing and insulating the attic and improving ventilation, runs $1,000–3,000, far less than one winter of interior repairs. Here is how the bill climbs from a $30 roof rake to a five-figure reroof.
The escalation ladder
Every row below is the same leak, left a little longer. The top is a cheap warning; the bottom is a claim.
| What happens | Typical bill | How fast |
|---|---|---|
| You rake snow off the lowest few feet of roof after a storm | $30–50 roof rake, DIY | Same day |
| You hire a crew to steam one dam off the eaves | $300–600 per visit | A few hours |
| Meltwater backs up and stains a top-floor ceiling | $200–800 to patch and repaint | Days after a thaw |
| Water soaks insulation, drywall, and trim | $1,500–4,000 in repairs | One winter |
| Chronic leaks feed attic and wall mold | $2,000–6,000+ in remediation | Months of damp |
| Repeat dams rot the roof deck and eaves | $8,000–20,000 early tear-off and reroof | A few seasons |
Warning signs
You can read an ice dam from the ground. Watch for a thick ridge of ice built up along the roof edge and gutters, with rows of icicles hanging off it. Inside, look for water stains or bubbling paint on top-floor ceilings and exterior walls a day or two after a thaw, damp spots around window headers, and icicles forming behind the gutter rather than at the very lip. A warm, snow-free patch high on the roof while the eaves stay packed with snow is the tell that attic heat is driving the melt. Any interior stain means water is already past the shingles.
The prevention math
Chipping ice off the eaves every winter treats the symptom; the cure is keeping the roof deck cold so the snow up top never melts. Air-sealing the attic bypasses, adding insulation to roughly R-49, and opening clear soffit-to-ridge ventilation runs $1,000–3,000 once and largely ends the cycle. Until then, pull snow off the lowest 3 to 4 feet of roof with a $30–50 roof rake after each big storm so no dam can form. Set against a single $1,500–10,000 water-damage repair, the attic work pays for itself the first winter it prevents a leak. The same warm, leaky attic that feeds ice dams also drives up heating bills, so handle it alongside a broader seasonal maintenance routine, and pair it with guarding against frozen pipes on the same cold nights.
Every line in that table starts with a skipped 10-minute task. OnOtto keeps the 10-minute version on your calendar so the $2,000 version never happens.
Get the nudge before the billFrequently asked questions
Can I just knock the icicles down and be done with it?
Knocking icicles off clears a symptom, not the dam behind them, and swinging a rake or hatchet from a ladder in winter is how people fall or gouge the shingles. Pulling snow off the lowest 3 to 4 feet of roof with a roof rake after each big storm is safer and actually starves the dam. If a dam has already formed and water is getting inside, hire a crew to steam it off for $300–600 rather than chipping at the ice yourself.
Does homeowners insurance cover ice dam damage?
Usually yes for the sudden interior water damage, since a standard policy covers water that backs up under shingles and ruins drywall, insulation, and floors. What it will not pay for is the ice removal itself or the root cause, so the $300–600 steaming visits and the $1,000–3,000 attic work come out of pocket. File promptly, document the stains, and expect your deductible to apply. Repeated claims can also raise your premium, which is one more reason to fix the attic once.
Do heat cables on the roof stop ice dams?
Heated cables zig-zagged along the eaves melt channels so water can drain instead of pooling, and they help on a stubborn problem roof. They are a bandage, not a cure: they draw electricity all winter, last only 3 to 10 years, and do nothing about the attic heat loss driving the dam. Expect $500–1,500 installed. Most homes are better served spending $1,000–3,000 once on air-sealing and insulation, then adding cables only on a section that still ices up.
Why do I get ice dams when my neighbor's roof stays clear?
Ice dams track attic heat loss, not just snowfall, so two similar-looking roofs behave very differently. A warm attic from missing insulation, air leaks around lights and the attic hatch, or blocked soffit vents melts the snow that then refreezes at the cold eaves. Complex rooflines, low-slope sections, and north-facing valleys ice up first. Your neighbor likely has a colder, better-ventilated attic. A thermal look or an energy audit will usually show exactly where your heat is escaping.