What Are Ice Dams?
Ice dams form when snow on your roof melts due to heat escaping from your attic. The melted snow runs down to the colder edges of your roof, where it refreezes and creates a “dam.” This dam blocks additional melted snow from draining, forcing water under your shingles and into your home.
Why Are Ice Dams Dangerous?
Ice dams pose significant risks to your home, including:
- Water Damage: Leaks caused by ice dams can damage ceilings, walls, and insulation.
- Mold Growth: Prolonged moisture fosters mold, which can harm your health.
- Structural Decay: Ice dams can weaken your roof deck, rafters, and exterior walls.
- Higher Energy Bills: Poor insulation and heat loss (common causes of ice dams) mean your HVAC system works harder to maintain indoor temperatures.
How to Prevent Ice Dams
- Ensure Proper Attic Insulation:
- Use at least R-49 insulation (the standard in Ontario).
- Check for gaps or thin spots, especially near the edges of your attic.
- Improve Ventilation:
- Install soffit and ridge vents to create proper airflow.
- Keep vents clear of insulation blockages.
- Seal Air Leaks:
- Seal gaps around pipes, chimneys, and light fixtures that let heat escape into the attic with caulk or spray foam.
- Regular Maintenance:
- Clean gutters before winter to ensure water flows freely.
- Remove debris like leaves and branches that can block drainage.
What to Do If You Have an Ice Dam?
If you discover an ice dam, follow these steps:
- Step 1: Remove excess snow using a roof rake (from the ground, never from the roof).
- Step 2: Create channels in the ice dam to let water drain safely. Melt the ice with calcium chloride (not rock salt).
- Step 3: Call a roofing professional. Using hammers, axes, or hot water to break up ice dams can cause serious damage to your roof.
Why Should You Hire a Professional?
Removing ice dams improperly can void your roof’s warranty or cause further damage. At Platinum Roofing, we use specialized steam equipment to safely remove ice dams without harming your shingles or gutters.
FAQs About Ice Dams
Q: Can ice dams form on a flat roof?
A: Yes, though less common. Flat roofs without proper drainage systems are prone to pooling water, which can refreeze and cause ice damming.
Q: How can I tell if I have an ice dam?
A: Look for icicles forming along your roof’s edge, water stains on interior ceilings, or peeling paint near the roofline.
Q: Will installing heat cables prevent ice dams?
A: Heat cables can help prevent ice buildup but should be used alongside proper insulation and ventilation.
About Platinum Roofing:
At Platinum Roofing, we help homeowners in Hamilton, Oakville, Burlington, Niagara, and Mississauga protect their properties with expert roofing and insulation services. Schedule your free consultation today to winter-proof your home!
By implementing these preventive measures, your property can weather Ontario’s brutal winters without the costly disruptions of ice damming. Contact Platinum Roofing today to learn how we can protect your business.
