Does homeowners insurance cover ice dam damage?

Generally yes for the resulting water damage to interior finishes (drywall, paint, flooring, ceilings). The ice dam itself and the underlying roof condition are not covered — those are maintenance items. Document the loss as 'water intrusion from ice dam formation during [date]' and submit photos of the dam from the same day if you have them.

Should I knock the icicles off?

Big icicles can be dangerous to people below — knock them off with care from the ground (pole, not by climbing). But removing icicles doesn't remove the dam itself, which sits behind the icicle wall along the gutter line. The icicle removal is a safety measure, not a fix.

Will hiring a contractor to steam the ice dam off cause damage?

Professional steam removal (low-pressure steam, not high-pressure water) is the safest way to remove an active ice dam without damaging shingles. High-pressure pressure-washer methods or chipping with axes/picks do damage roofs. If you hire someone, verify they're using a steam system, not a pressure washer.

How fast does mold start growing in wet attic insulation?

24-72 hours from saturation, like any other porous material. Wet attic insulation is particularly bad because it sits in a low-air-circulation space against framing, ideal mold conditions. If you find wet insulation after an ice dam, schedule remediation immediately rather than 'letting it dry out' — it won't.

Does Portland get ice dams every winter?

Not every winter — we typically see one to two ice events per season in the metro, and not all of them produce damming. The recipe is sustained sub-freezing temperatures with snow accumulation, then a slow thaw with above-freezing days and below-freezing nights for several days. The 2024 ice storm produced widespread ice damage; many winters pass with no significant ice events at all.

Storm · 7 min read

Ice Dam in Portland: Pull These Moves Before the Thaw

Portland gets one or two real ice events per winter, and each one produces a predictable wave of attic and ceiling damage when the thaw arrives. The damage isn't caused by the snow — it's caused by what happens at the eaves while you're inside enjoying the snow day. Here's how to get ahead of it.

May 12, 2026 · By Dmitry Zinovyev

Ice dams aren't a Pacific Northwest hallmark the way they are in Buffalo or Minneapolis, but Portland metro homes get them often enough that we run a wave of attic-water and ceiling-stain calls every February. The mechanism: snow on the roof melts because the attic is warmer than 32°F, the meltwater runs down the slope, refreezes at the eaves (which are colder than the heated attic above), builds an ice ridge, and dams subsequent meltwater behind it. That dammed water finds the smallest gap in your roof's water-shedding system — usually under shingles at the eave — and runs sideways into the building.

By the time the homeowner sees a brown stain on the ceiling, days of intrusion have already happened. The window to prevent the damage is between when the snow lands and when the temperature swings back above freezing — typically 24-48 hours in this metro.

Signs you have an ice dam forming

Walk outside and look at the eaves and gutters of every roof slope. Things to look for:

An ice ridge or icicle bank along the gutter line. Small icicles are normal; a continuous wall of ice across the eave is a dam.
A wet patch on the underside of the soffit. That means water has already found a path inside the eave assembly.
Snow melting in patches on the roof, especially at the ridge or above heated rooms. This indicates uneven attic heat loss — the precondition for ice damming.
A stain or wet spot at the corner of an interior ceiling, especially near an exterior wall. By the time you see this, intrusion has been happening for 24+ hours.

What to do RIGHT NOW (before the thaw)

1. Cool the attic

Ice dams form when the attic is warm enough to melt the snow above it. The fastest way to stop active melt is to cool the attic — open every accessible attic vent, leave the access hatch open, and turn down the heat in the rooms below for the night. This won't fix anything long-term, but it slows the dam's growth dramatically over the next 12-24 hours.

2. Remove snow from the lower three to six feet of the roof

If you have a roof rake (a long-handled rake designed to pull snow off a roof from the ground), use it. Pull snow off the lowest three to six feet of every accessible roof slope. Don't try to remove the dam itself — that requires safer access. Removing the snow upstream of the dam starves it of future meltwater.

Do not climb on the roof. Pacific Northwest roof pitches plus ice equals a serious fall risk. Roof rakes work from the ground; if your roof is two-story or has a complex shape, call a roofing or restoration contractor before climbing anything.

3. Calcium chloride socks at the eave

Fill an old sock or pantyhose leg with calcium chloride ice-melt pellets (not rock salt — rock salt damages roof shingles and gutters). Lay the sock vertically across the ice dam at the eave. As it melts, it creates a channel through the dam that lets the meltwater drain. You can usually toss the sock onto the dam from a ladder positioned at the edge of the gutter without needing to climb the roof.

4. Put towels at the ceiling stain

If you already see staining or active dripping at an interior ceiling, place a tarp on the floor and pile towels on top to catch ongoing drips. Don't poke a hole in the ceiling — wait for restoration. Document the staining with photos every few hours so you have a timeline.

What to do AFTER the thaw

Once temperatures are back above freezing, the dam will melt over a few days. Resist the urge to declare victory — much of the intrusion damage shows up in the week AFTER the thaw, as wet insulation slowly transfers moisture into framing, drywall, and ceiling assemblies.

Two checks in the week after:

Walk the attic with a flashlight and look for wet insulation, staining on the underside of the roof deck, or water trickles down the rafters. Any of these = active intrusion damage.
Walk every interior ceiling and the upper foot of every exterior wall. Look for fresh staining, paint bubbling, or warping. Touch suspect spots — they'll feel cool and damp.

If you find any of the above, call us. Wet insulation rarely recovers; soaked drywall must be removed before mold colonizes it (24-72 hours from saturation). The clock starts the day the snow falls, not the day you notice the stain.

Long-term: stop next year's ice dam

Ice dams are caused by attic heat loss, not by snow itself. The permanent fixes:

Improve attic insulation to R-49 or above (R-30 is typical in pre-2000 Portland metro homes — undersized for current code).
Seal attic air leaks: recessed lights, plumbing penetrations, attic hatch perimeter, top plates above interior walls. Air leaks dump warm interior air into the attic and create localized melt zones.
Improve attic ventilation — soffit intake plus ridge exhaust, sized for the attic area. Most Portland metro homes are under-ventilated.
Install heat cable at the eaves on chronically-problematic roof sections (last resort, but inexpensive and effective).

These are off-season projects, typically $2,000-$6,000 depending on attic size and current state. We don't do attic work directly, but we coordinate with insulation and roofing contractors we trust if you'd like a referral after we restore the immediate damage.