As February temperatures fluctuate in the Greater Toronto Area, many homeowners are noticing a beautiful but dangerous sight: giant icicles hanging from their gutters. While they may look like a winter wonderland, they are often a sign of a serious roofing problem known as an ice dam.

A small ice buildup can quickly turn into a major interior leak. If your attic feels more like an ice factory lately, here’s everything you need to know to protect your home.

What is an Ice Dam and Why Does it Form?

An ice dam occurs when the upper part of your roof (the ridge) is warmer than the lower part (the eaves).

Heat Escape: Heat leaks from your living space into the attic due to poor insulation or air leaks.

Snow Melt: This heat warms the roof deck, melting the bottom layer of snow on your roof.

The Freeze: The meltwater flows down to the edge of the roof, which is over the cold eaves and gutters. There, it refreezes, creating a "dam" of ice.

The Backup: As more snow melts, the water gets trapped behind this ice dam. With nowhere to go, it forced its way under your shingles and into your home’s walls and ceilings.

4 Red Flags Your Roof is at Risk

If you notice any of these signs around your Toronto home, it’s time to call in the professionals:

Massive Icicles: Especially those forming behind the gutters or reaching down to the ground.

Ice Behind Gutter: If ice is bulging out from behind the eavestrough or coming through the soffit.

Water Stains: Yellow or brown spots on your interior ceiling or top-floor window frames.

Uneven Snow Melt: If your neighbors’ roofs are covered in snow but yours is bare in certain patches, your attic is losing too much heat.

How to Stop the "Ice Factory" Effect

Fixing an ice dam isn't just about hacking away at the ice (which can actually destroy your shingles). It’s about managing the temperature of your roof.

Improve Attic Ventilation: Proper airflow keeps the roof deck cool, ensuring snow melts evenly rather than refreezing at the edges.

Seal Air Leaks: Gaps around chimneys, light fixtures, and attic hatches are the primary culprits for rising heat.

Upgrade Insulation: Increasing your R-value prevents heat from reaching the roof surface in the first place.

Professional Steam Removal: If you already have a dam, never use a hammer or salt. Professionals use low-pressure steam to safely melt the ice without voiding your shingle warranty.

Why Choose Maple Ridge Roofer for Your Winter Protection?

In Ontario, your roof is your first line of defense against the elements. We specialize in Toronto roofing solutions that go beyond just shingles. We look at the "whole roof system"—including ventilation and insulation—to ensure your home stays dry all winter long.

Pro Tip: Don’t wait for the spring thaw to find out you have a leak. A quick winter roof inspection can save you thousands in structural repairs and mold remediation.

Get a Free Inspection Today!

Is your roof struggling with the Toronto winter? Contact Maple Ridge Roofer today for a professional assessment. We’ll help you melt the problem away before it hits your living room.

REQUEST A QUOTE or call us at +1 (437)422-8333