Ice Dam Removal in Spokane

An ice dam is a ridge of ice that forms along the lower edge of a roof, typically at the gutter line. As snow accumulates on the roof, heat escaping from the attic warms the upper portion of the roof deck and melts the bottom layer of snow. That meltwater flows down the roof until it reaches the overhang, where there is no attic heat beneath and the temperature is at or below freezing. The water refreezes at the eave, building up layer after layer into a solid ice ridge.

Once the ice dam is established, it creates a barrier that traps subsequent meltwater behind it. That pooled water sits on the roof surface with nowhere to go but under the shingles. Most asphalt shingles are designed to shed water flowing downward — they are not waterproof against standing water. Capillary action and gravity push the water up under the shingle tabs, through the underlayment, and into the roof deck. From there, water follows the path of least resistance into your attic insulation, ceiling drywall, and wall cavities.

The process can repeat all winter long. Each day of partial thaw followed by overnight freezing adds to the ice dam and extends the window for water intrusion. Homeowners often do not notice the damage until they see water stains on ceilings, bubbling paint, damp insulation, or in severe cases, water actively dripping indoors.

Ice dams are not just a nuisance. They are a source of serious, progressive damage that compounds the longer they are left in place. Here is what happens when ice dams are ignored.

Water Under Shingles

The most immediate damage is to the roofing itself. Standing water forced under shingles bypasses the water-shedding design and soaks into the underlayment and roof deck. Over days and weeks, the plywood or OSB sheathing swells, delaminates, and begins to rot. Once the roof deck is compromised, replacing individual shingles is not enough — the structural decking has to be cut out and replaced. This alone can run into thousands of dollars.

Interior Ceiling and Wall Damage

Water that penetrates the roof deck follows gravity and capillary action into the attic insulation below. Wet fiberglass insulation loses its R-value and clumps, meaning it stops insulating effectively even after it dries. The water continues through the drywall ceiling, appearing first as yellow or brown stains, then as bubbling or peeling paint, and eventually as active dripping. In finished attics or rooms with vaulted ceilings, the water runs down interior walls, ruining drywall, warping window frames, and soaking into baseboards. If the leak reaches electrical wiring, the situation becomes a safety hazard.

Gutter Damage

The ice that forms inside the gutter weighs far more than water alone. A gutter packed with solid ice can weigh several hundred pounds — well beyond what standard hangers and brackets are designed to support. The gutters warp, crack at the seams, or pull completely away from the fascia board. Downspouts that are blocked with ice expand and split. By the time spring arrives, homeowners are looking at full gutter replacement in addition to whatever interior repairs are needed.

Fascia Board Rot

Water that overflows or backs up from ice-filled gutters soaks into the wooden fascia board running along the roof edge. In Spokane's wet winter conditions, that wood stays damp for weeks or months. The result is fungal rot that weakens the fascia to the point where it can no longer hold gutter hardware. Replacing rotted fascia means removing the gutters, cutting out the damaged wood, installing new pressure-treated lumber, and reattaching everything. It is a repair that costs significantly more than a single ice dam removal.

Removing an ice dam solves the immediate problem, but without addressing the underlying cause, the same dam will reform the next time conditions line up. A comprehensive prevention strategy targets the root cause and adds secondary defenses.

Attic Insulation

The single most effective prevention measure is adding insulation to the attic floor to R-49 or higher. This keeps the heat from your living space inside your home instead of warming the roof deck. For Spokane homes built before modern energy codes, this often means blowing in cellulose or fibreglass insulation to supplement what is already there. The Department of Energy recommends at least 14 to 18 inches of blown-in insulation for the Inland Northwest climate zone.

Attic Ventilation

Proper ventilation works alongside insulation to keep the roof deck cold. The goal is continuous airflow from soffit vents at the eave to ridge vents at the peak. This moving air carries away any residual heat that reaches the attic space, so the roof surface stays at ambient outdoor temperature. Without adequate ventilation, even well-insulated attics can develop warm pockets that create localized snowmelt and ice dams.

Air Sealing

Gaps around recessed lights, attic hatches, plumbing stacks, electrical runs, and chimney chases allow warm air to bypass insulation entirely. Sealing these penetrations with caulk, spray foam, or weatherstripping is often the most cost-effective single step a homeowner can take. An energy audit with a blower door test can identify exactly where the air leaks are.

Gutter Maintenance

Gutters that are full of leaves, pine needles, and debris cannot drain meltwater in the fall before temperatures drop. That standing water freezes solid and becomes the foundation of an ice dam. Having your gutters professionally cleaned in late October or early November — after the leaves are down and before consistent freezing — gives the system a chance to drain properly through the first part of winter.

Heat Cables

Self-regulating heat cables installed along the roof edge and inside the gutters provide a secondary defense. They warm the eave just enough to keep meltwater flowing into the downspouts instead of refreezing. Heat cables do not fix the root cause — attic heat loss — but they are a practical supplement for homes where full insulation and ventilation upgrades are not immediately feasible. We install and maintain heat cable systems as part of our winter preparation services.