Home & Safety Preparedness | Preventing Ice Dams

Preventing Ice Dams

How Ice Dams Form

Ice dams occur when snow on a roof begins to melt from the heat of the house (often due to poor insulation or ventilation) and the water runs off the roof. If there is a significant difference in temperature at the edge of the roof, the water freezes into a solid mass of ice, blocking the melt water from draining properly into the gutters.

What happens next? Ice dams often damage gutters and shingles. Worse, melt water trapped behind the dams can back up into your home. Warped ceilings, walls and floors, and damaged paint and insulation and mildew are likely consequences. Truly massive ice dams, such as the type that occurred during the winter of 2014/2015, can cause roof collapse – destroying the home and contents and endangering residents.

Preventing Ice Dams

From low-tech prevention to advanced systems, there are various solutions to avoiding ice dams.

Do-it-yourself snow removal. If you have a low roof you can reach from the ground, consider purchasing an ice rake to remove fresh snow from the first few feet (from the edges toward the top) of your roof’s surface after every storm. Ice rakes are long (approximately 20’) very light weight tools that allow you to pull snow off the roof while you are safely on the ground and well away from the area in which the snow will fall. They are usually available in hardware stores and online.

Be mindful to ensure there is a path for meltwater to flow off the roof so that it does not enter the home in another area. Always use caution to ensure you are not injured when you remove snow.

Snow removal services. If your roof is simply too high, or inaccessible from the ground, or circumstances make removing roof snow yourself unfeasible, contact a snow removal service. The associated fees are likely much lower than the cost

Roof-mounted heating cables. Consult a professional to find out about installing specialty heating cables. These cables are generally installed in a zig-zag pattern along the eaves of the roof and prevent ice dams from forming.

Ice-dam resistant roof panels. Professionally mounted, heated panels shaped to maximize runoff and prevent ice from forming may be a good solution for some homes.

Optimizing insulation and ventilation. Do some research about attic ventilation to see if you should make changes.Heat build-up will contribute to ice dams no matter how good your insulation is and usually carries excess moisture, contributing to even more problems. Determine what the optimum insulation is for your area and check it against what you currently have and consider making adjustments if necessary.

An Ounce of Prevention…

…could be worth tens or even hundreds of thousands of dollars of savings to you. If you live in an area likely to get heavy snowfall, take preventative measures to avoid ice dams. You may avoid serious damage to your home and other property and major injury to yourself and family.

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