If you own a home in Orillia, Barrie, Severn, or the Muskoka region, you've likely seen the telltale sign: a thick ridge of ice forming at the edge of your roof in January or February, with icicles hanging below and water staining appearing on your ceiling inside. That's an ice dam, and it's one of the most destructive winter problems Ontario homeowners face.
How Ice Dams Form
Ice dams are a roofing and insulation problem that plays out at the eavestrough. Here's the sequence:
- Heat escapes through your roof (from inadequate attic insulation or air sealing)
- That heat warms the middle sections of your roof, melting snow
- Meltwater runs down toward the eaves — but the eaves are cold because they extend past the warm building envelope
- The water refreezes at the eave and in the eavestrough, forming a dam
- Water backs up behind the dam and can infiltrate under shingles, soaking insulation and causing interior water damage
The Role of Eavestroughs in Ice Dam Damage
Eavestroughs themselves don't cause ice dams — but they're directly in the path of damage. When a dam forms and backs up liquid water, that water sits in and around your eavestrough system under enormous pressure. The weight of ice can:
- Tear eavestrough hangers and brackets out of the fascia
- Pull entire eavestrough runs completely off the house
- Crack or split sectional gutters at the joints
- Rot the fascia board underneath if water infiltrates
In severe cases, the weight of ice dams can even damage roof decking and shingles. We see this damage regularly in Severn Township and Muskoka, where winters are long and snowfall is heavy.
Does Removing Ice from Eavestroughs Fix the Problem?
Chipping ice off your eavestroughs is a temporary fix at best — and a dangerous one. Hacking at ice on a ladder in winter is how homeowners get hurt. It also risks damaging your gutters if done with metal tools.
The real fix is two-part:
- Short term: Improve attic insulation and ventilation so less heat escapes through the roof deck
- Long term: Ensure your eavestrough system is properly installed, pitched, and maintained so that any meltwater that does reach the gutter can drain efficiently rather than pooling and refreezing
Had ice dam damage this past winter? We inspect eavestrough systems across Simcoe and Muskoka and can tell you exactly what repair or replacement is needed — usually the same day we visit.
Book a Free InspectionHow Proper Eavestrough Installation Reduces Ice Dam Risk
A correctly installed seamless eavestrough system won't prevent ice dams — that's an insulation problem — but it significantly reduces damage from them:
- Correct pitch: Properly pitched gutters (1/4 inch drop per 10 feet) allow meltwater to drain quickly rather than pooling and freezing
- Right-sized downspouts: Undersized downspouts are the first place ice forms; we size them for Muskoka's snow load
- Solid hangers every 24 inches: Professional installation means hangers can withstand ice weight without pulling out of the fascia
- Heated cable compatibility: If your home is prone to ice dams, we can install eavestroughs that accommodate heat cable runs for extra protection
What to Do Right Now If You Have Ice Dam Damage
If your eavestroughs are sagging, pulling away from the fascia, or visibly damaged after this past winter, address it before spring rains arrive. Damaged eavestroughs in April mean water going directly against your foundation during the wettest months of the year in Ontario.
Call us for a free inspection. We'll assess the full system — hangers, pitch, downspout sizing, fascia condition — and give you a clear quote on what's needed.