Ice Dams 101: How to Protect Your Roof Before the Freeze

When Ontario winters hit, the last thing you want to worry about is water dripping through your ceiling. Unfortunately, ice dams — ridges of ice that form along the roofline — are a common cause of winter leaks, interior damage, and costly repairs.

The good news? Ice dams are preventable. By improving your attic insulation and ventilation, you can protect your roof and keep your home warm, safe, and dry this winter.

❄️ What Are Ice Dams?

Ice dams occur when:

1. Heat from your attic escapes through the roof.
2. Snow on the roof melts, then refreezes at the colder eaves.
3. Ice builds up, blocking proper drainage.
4. Water backs up under shingles, leaking into your attic or home.

👉 Result: stained ceilings, damaged drywall, mold growth, and compromised insulation.

🚨 Signs Your Home Is at Risk

• Icicles forming along roof edges
• Water stains on ceilings or in the attic
• Uneven snow melt on your roof
• Drafty or inconsistent room temperatures
• High heating bills in winter

If you notice these warning signs, your roof likely needs better attic insulation or ventilation.

🛠️ How to Prevent Ice Dams

1. Upgrade Attic Insulation

• Proper insulation keeps heat inside your living space, not your roof.
• In Ontario, attic insulation should reach at least R-50 to R-60.
• Blown-in cellulose or fiberglass is a cost-effective way to boost R-values.

2. Improve Attic Ventilation

• Good airflow balances attic temperature with outdoor air.
• Soffit and ridge vents ensure warm, moist air escapes.
• Prevents condensation, mold, and premature roof wear.

3. Seal Air Leaks

• Small leaks around plumbing, chimneys, or light fixtures can let warm air rise.
• Air sealing + insulation = maximum energy savings and roof protection.

4. Gutter & Roofline Care

• Keep gutters clear so melting snow can flow away.
• Pair with a fall roof inspection to check flashing and shingles.

🌟 The Benefits of Proactive Ice Dam Prevention

✔️ Protects your roof from leaks and damage
✔️ Saves on costly mid-winter repairs
✔️ Improves indoor comfort by eliminating drafts
✔️ Reduces heating bills by 15–20%
✔️ Extends the lifespan of your roof and insulation

🏡 Attic Insulation & Ventilation Services in Ontario

At Contract Link, we help homeowners across Kitchener, Waterloo, Guelph, Cambridge, Hamilton, and Brantford stop ice dams before they start.

✔️ Blown-in attic insulation upgrades
✔️ Spray foam sealing for leaks and rim joists
✔️ Attic ventilation improvements (soffit & ridge vents)
✔️ Roofline inspections and maintenance packages

👉 Book Your Free Attic Assessment Today

Don’t wait until icicles form — protect your roof and home now with proper insulation and ventilation. 🏠❄️