Ice dams are a bothersome problem that effect many Canadian homes each winter. They are caused by a ridge or wall of ice that forms on the perimeter of a roof. The wall of ice is created by melting snow that freezes on a roof. This wall of ice then acts as a dam causing melting snow or water to back up and leak into a home. In order for an ice dam to occur two factors must combine to facilitate the process.

First off, there must be a heavy snowfall and secondly heat must be passing through the roof due to improper insulation and ventilation. Ice dams are a very common problem and they tend to go untreated due to misconceptions and misinformation.

Heat Loss

Heat loss plays a major role in ice dams. The main factor in the creation of ice dams is warm attic space and a warm roof. As heat passes through a roof it melts the snow on top, accelerating the growth of an ice dam. If left to accumulate, ice dams can lead to extensive damage. However, if the proper prevention techniques are employed these damages can be avoided.

Having the correct ventilation and insulation in a home will stop ice dams and make them a thing of the past. Warm air can escape from the attic through an array of crevasses, such as: wiring, chimneys, etc. Proper insulation will stop these processes. With proper ventilation warm air rises and exits the house in a controlled manner.

Furthermore, cold air can then be recycled into the attic helping stabilize the temperature. By having professionals combine the proper ventilation and insulation techniques homeowners are able to keep the roof cold which is key in preventing ice dams.