Ice dams are one of the most common causes of winter roof leaks in Northeast Ohio, and they’re often completely preventable. When warm air escapes into your attic, it melts snow on the upper part of your roof, which refreezes at the colder eaves and forms a ridge of ice that backs water up under your shingles. Here’s what causes them and how to stop them before winter sets in.
What Actually Causes Ice Dams
Ice dams aren’t really a gutter problem or a roof problem on their own — they’re an attic problem. Poor insulation and ventilation let heat rise into the attic and warm the roof deck unevenly, so snow melts near the ridge and refreezes near the eaves where the roof stays cold. The more heat that escapes, the worse the cycle gets over the course of a winter.
Warning Signs to Watch For
- Icicles forming along the eaves, especially thick ones
- A visible ridge of ice building up at the roof’s edge
- Water stains on interior ceilings or walls near exterior walls
- Uneven snow melt on your roof, with bare patches near the ridge and snow-covered eaves
How to Prevent Them
Proper attic insulation and ventilation are the real fix — they keep your roof deck a consistent, cold temperature so snow melts evenly instead of refreezing at the edges. Ice and water shield underlayment installed along the eaves during a roof replacement adds a second layer of protection against backed-up water. Clean gutters also help meltwater drain instead of pooling and refreezing, which is one more reason gutter maintenance matters heading into winter.
If You Already Have an Ice Dam
Don’t chip at the ice or climb onto a snow-covered roof — both are more likely to cause damage or injury than to solve the problem. Roof rakes can safely remove snow load from the ground, and a professional can steam off the ice dam itself without harming your shingles. If you’re seeing active leaking, that’s worth a same-day call.
Get Ready Before the First Freeze
ARC Roofing & Home Improvements checks attic insulation, ventilation, and roof condition together, because ice dams are rarely just one issue. Request a free pre-winter roof inspection or call (440) 212-2083 before the snow flies.