Ice dams are one of those problems that feel like bad luck — your roof starts leaking in the middle of January, water is coming in around a window or staining your ceiling, and you have no idea why. The roof wasn't old. There was no storm. The water just... appeared.

The cause is almost always an ice dam, and once you understand how they form, you'll also understand why Buffalo and the surrounding Lake Erie shoreline communities get hit harder than almost anywhere else in the country.

How Ice Dams Form — The Physics in Plain Language

The process has three steps, and it begins inside your house.

Step 1: Heat escapes your attic. If your attic is under-insulated or has air leaks — around light fixtures, plumbing vents, the attic hatch, or where the walls meet the roof — warm air from your living space migrates upward into the attic. Your attic becomes warmer than the outdoor temperature.

Step 2: The snow on your roof melts. The warmed attic heats the roof deck above it, which melts the snow resting on that portion of the roof. Water runs downward toward the eaves.

Step 3: The water refreezes at the cold eaves. Here's the critical point: the eaves (the overhanging portion of your roof beyond the exterior wall) are not over the heated attic space. They're cold — at or near outdoor temperature. The water that ran down from the warm roof hits the cold eaves and freezes. It accumulates. As this ice builds up, it creates a dam.

Water from subsequent melting now has nowhere to go. It backs up behind the ice dam and sits on the roof. Shingles are designed to shed water that runs downhill — they're not designed to hold standing water. The water finds the path of least resistance: under the shingles, into the roof deck, through the insulation, and into your ceiling or walls. [1]

The Scale of the Problem in WNY

Ice dams happen across the snowbelt, but Western New York has a particular vulnerability: lake-effect snowfall accumulates rapidly and doesn't always melt between storms. A 30-inch accumulation in December can sit on your roof for weeks. [4] During that time, any heat escaping your attic is constantly working on it.

Erie County experiences some of the highest ice dam claim rates in New York State. The insurance industry tracks this. According to data from insurance industry groups, average ice dam water damage claims in high-snowfall regions like WNY run between $4,000 and $15,000 — with severe cases involving structural damage exceeding $25,000. [1]

The communities south of Buffalo — Hamburg, Orchard Park, West Seneca, East Aurora — tend to experience the heaviest lake-effect accumulations and correspondingly high ice dam rates. But anywhere in Erie or Niagara County with an older, under-insulated home is at risk.

The $20 Fix: The Roof Rake

The most immediate, low-cost prevention tool is a roof rake — a wide plastic or aluminum blade on a telescoping handle that allows you to pull snow off the lower 3–4 feet of your roof while standing safely on the ground.

You don't need to clear the entire roof. You need to remove the snow from the lower portion where the ice dam forms — the eave area and the first few feet of roof above it. Without snow to melt, there's nothing to run down and refreeze.

A good roof rake costs $20–$45 at Home Depot, Lowe's, or any WNY hardware store. Models with rollers or bumpers protect your shingles better than flat blade models. The Garant and True Temper brands are widely available and reliable.

Use it after every significant snowfall — typically anything over 6 inches. Don't wait until the storm is over if more snow is forecast; rake what's there and rake again after the storm. The snow is lightest and easiest to move in the first 12–24 hours.

Safety notes:

  • Never go on the roof during winter to clear ice or snow. Falls from icy roofs are a leading cause of serious injury in WNY each winter.
  • Watch where you stand and rake — snow falling off the roof edge is heavy and comes fast.
  • Keep the rake head away from electrical service lines.

The Long-Term Fix: Attic Air Sealing and Insulation

The roof rake handles the symptom. Fixing the attic handles the cause.

Two things need to happen to permanently eliminate ice dams:

Air sealing: Before adding insulation, seal the air leaks that allow warm house air into the attic. The most common leak points are:

  • Recessed light fixtures (can be a significant source — use IC-rated airtight caps inside the attic to seal them)
  • Plumbing vent pipe penetrations through the ceiling
  • The attic access hatch (should have weatherstripping and at least R-38 insulation on the back)
  • Top plates of interior walls where they meet the roof framing

Air sealing is typically done with spray foam, caulk, or rigid foam board, depending on the gap size. A professional energy auditor can identify your specific leak points.

Insulation: After sealing, bring attic insulation to the WNY-recommended level of R-49 to R-60. [2] Blown-in cellulose or fiberglass insulation is the standard approach for existing homes. A professional insulation job for an average Buffalo-area house costs $1,500–$3,500 and pays for itself in reduced heating costs — and eliminated ice dam damage — typically within 3–7 years.

Free option: The NYS Weatherization Assistance Program (1-800-342-3722) provides free attic air sealing and insulation for qualifying homeowners based on income. [3] Apply well before winter — there can be waiting lists.

What Insurance Covers — and What It Doesn't

Most standard homeowners insurance policies do cover water damage resulting from ice dams. If water backs up behind an ice dam and damages your ceiling, walls, insulation, flooring, or belongings, that damage is generally a covered claim under the "sudden and accidental" water damage provision.

What's typically not covered:

  • The cost of removing the ice dam itself (this is considered maintenance, not a covered loss)
  • Damage that results from long-term neglect or failure to maintain the home
  • The cost of repairing or replacing the insulation that caused the problem

Review your specific policy's language around "ice damage" and "water damage" — policies vary. Call your agent in October, before any event occurs, to understand what you have.

Filing a claim: Document everything with photographs before any cleanup. Don't let a contractor start remediation until you've contacted your insurer and they've authorized the scope of work or sent an adjuster.

When to Call a Professional Right Now

If you have an active ice dam and water is entering your home, this is not a situation for roof rakes. You need professional ice dam removal.

WNY roofing and restoration companies use steam removal — a low-pressure steam wand that melts through the ice without damaging shingles. This is the method recommended by roofing professionals over chiseling (which damages shingles) or salt products (which damage metal flashing and can harm landscaping).

Typical steam removal costs in WNY: $200–$600 depending on the size of the dam and the extent of the problem. Some companies also offer emergency water mitigation if interior damage has occurred.

Look for licensed, insured contractors. Several WNY roofing companies offer ice dam emergency response with same-day or next-day availability during the peak season. Ask when you call whether they use steam removal — it's the safest and most effective method.

After the immediate emergency is resolved, address the underlying attic insulation and air sealing to prevent a recurrence.


Sources

  1. Insurance Institute for Business & Home Safety (IBHS) — Ice dam formation and prevention. ibhs.org
  2. U.S. Department of Energy — Attic insulation R-value recommendations for cold climates (Zone 5–6): R-49 to R-60. energy.gov/energysaver/insulation
  3. NYSERDA EmPower New York — Free attic insulation for income-eligible homeowners. nyserda.ny.gov
  4. National Weather Service Buffalo — Buffalo averages approximately 94 inches of snow annually. weather.gov/buf