The mechanism
Your attic is melting the snow. The eave is refreezing it.
An ice dam needs two temperatures on one roof: warm up top, freezing at the edge. Cleveland winters supply the freezing; your attic supplies the warmth.
Heat escaping the living space warms the roof deck. Snow melts from below, runs down, and refreezes over the unheated eave. The ridge of ice grows, meltwater pools behind it, and pooled water does what shingles were never designed to resist — it climbs up under them and into the wall.
That mechanism explains what works and what doesn't:
- Works permanently: air-sealing the attic floor (top plates, can lights, the hatch), correcting insulation, and balancing intake/exhaust ventilation so the deck stays cold.
- Works today: steam removal of the dam and clearing the eave — the safe way to stop active water intrusion.
- Doesn't work: hammers, axes, pressure washers (shingle damage), rock salt in a sock (staining, corrosion, dead plants below), and hoping.
- Works with an asterisk: heat cable. It manages symptoms for tricky roof geometries; it also costs electricity forever and fails at the worst time. We treat it as the last resort, not the first offer.
Straight answers
Ice dam questions
Are icicles always a problem?
Small icicles off the gutter lip after a sunny day are normal physics. Thick ice ridged behind the gutter, icicles the diameter of your arm, or ice on the fascia/soffit mean melt-refreeze is happening where it shouldn't — worth a look before it's worth a claim.
Why do my neighbors' roofs have snow when mine is bare?
Backwards from what most people assume: the snow-covered roof is the healthy one. Bare patches in winter mean heat is escaping through the deck — the exact engine that builds ice dams.
What does the permanent fix cost?
Air-sealing plus insulation correction on a typical Cleveland attic usually lands between $1,500 and $4,000 depending on access and how much correction is needed — often less than two winters of dam removal and interior repairs. Removal alone runs $500–$1,500 per event.
Does homeowners insurance cover ice dam damage?
Often the resulting interior damage is covered while the preventive work is not — and Ohio wind/hail deductibles usually don't apply to ice claims, so the math differs from wind damage. Details on the insurance page.
Fix the cause before next winter prices it for you
Ice dam damage repeats annually until the attic is fixed. The permanent fix is usually cheaper than two winters of repairs.