Ice Damming Ottawa: Why It Happens and How to Prevent It

Ice damming occurs when snow melts on a warm roof and refreezes at the colder eaves, creating a dam that prevents further meltwater from draining off the roof. This can cause water to back up under the roof shingles, leading to damage to walls, ceilings, and insulation. Addressing ice damming in Ottawa is essential for maintaining the structural integrity of your roof and preventing costly repairs.

Why is Ice Damming in Ottawa Caused?

The primary cause of ice damming in Ottawa is uneven roof temperatures. This happens when the upper part of the roof is warmer than the lower edges. Several factors contribute to this, including:

• Poor attic insulation: Inadequate insulation allows heat from your home to escape into the attic, warming the roof and causing snow to melt unevenly.
• Inadequate ventilation: Without proper airflow, heat builds up in the attic, increasing the roof’s temperature and contributing to snowmelt.
• Insufficient ice and water shield membrane: A lack of a quality ice and water shield membrane installed behind the shingles can make your roof more vulnerable to water infiltration caused by ice dams.

What to Do About Ice Damming in Ottawa

Preventing ice damming in Ottawa requires a combination of proper maintenance and upgrading roofing materials. Here are some key strategies to help prevent ice damming:

1. Ensure Adequate Attic Insulation

One of the most effective ways to prevent ice dams is by adding insulation to your attic. Proper insulation helps keep warm air inside your home rather than allowing it to escape through the roof, keeping the roof cooler and preventing snow from melting unevenly.

2. Improve Attic Ventilation

Good attic ventilation allows for consistent airflow, keeping the roof temperature more uniform. Ventilation prevents heat buildup and keeps the roof cool, which minimizes snowmelt and the formation of ice dams. Ridge vents, soffit vents, or other ventilation systems can be installed to ensure adequate air circulation.

3. Seal Air Leaks

Sealing air leaks in your attic can prevent warm air from rising and warming the roof. Identifying and sealing gaps around vents, chimneys, and pipes helps reduce heat transfer and limits the risk of ice dam formation.

4. Remove Snow from the Roof

After heavy snowfall, it’s important to safely remove snow from the roof before it can melt and refreeze at the eaves. Use a roof rake to remove snow from the roof’s edges, helping prevent the buildup of ice dams. For large amounts of snow, it’s best to hire a professional for safe removal.

Upgrading Your Ice and Water Shield Membrane in Ottawa

If ice damming in Ottawa is a recurring issue, consider upgrading your roof’s ice and water shield membrane when replacing your roof. Installing a high-quality ice and water shield helps protect the roof-deck by sealing around nails and roof penetrations, preventing water infiltration caused by ice dams. Consult a professional roofing company like Aquila Roofing and Construction Inc. for proper installation and recommendations on the best membrane for your roof.

Conclusion: Protect Your Roof from Ice Damming in Ottawa

Ice damming in Ottawa can cause significant damage to your roof, walls, and ceilings if left unaddressed. By ensuring proper insulation, ventilation, and upgrading your roof’s ice and water shield membrane, you can minimize the risk of ice dams and protect your home. For professional advice and expert roofing solutions, contact Aquila Roofing and Construction Inc. to keep your roof safe from winter damage.