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Foam Insulation Can Prevent Ice Dams in Quebec

foam insulation prevents QC ice damsInadequate Attic Insulation Causes Ice Dams. Ice dams occur when snow melts on sloped roofs and then refreezes again. They are most often caused by attics and roofs with inadequate insulation. Two circumstances combine to make an ice dam.

If your home does not have proper and effective attic insulation, heat can escape from the living space during the cold winter months. Heat is transferred from the living space and also generated from recessed light fixtures, air ducts, furnaces and other appliances and equipment located in the attic. This heat raises the roof temperature above the freezing point, causing the snow and ice on the roof to melt and flow downward.

This area is often just inside the perimeter of the outside walls. Once the melted snow, or water, meets back up with the colder part of the roof (overhang) that hangs over and outside of the interior walls (just above the soffit vent area), it begins to freeze again, expand and back up. This dam that forms is where this effect gets its name from; ice dam.

Have you ever noticed one house that is completely covered with snow on the roof? Then you see a house with no snow, or with areas that have completely melted away. Contrary to one’s belief, the house with all the snow on its roof, typically resembles the better insulated one. You may also notice huge, long icicles hanging down off the roof of one house, but not on another. These are all signs of an inadequately insulated roof and/or attic space. See our section on SPF Attic Insulation and Ventilation.

Damages Can Occur
Backed up water can get under the shingles and through the roof deck. It can drip on the ceiling insulation or run down the underside of the deck to the connection between the roof and the walls. It then makes its way into the building in the form of damaging leaks. It can also lead to mold and mildew.

Melt water under the unmelted snow can decrease the friction between the snow and the roof and cause a dangerous snow slide, like an avalanche. Melt water often refreezes as icicles hanging from the gutters or edge of the roof. These icicles eventually break off when they get too heavy. Both snow slides and falling icicles endanger passersby.

Within this Canada regional spray foam site, you will find information and specifications on spray foam insulation and spray foam roof systems contractors including closed-cell and open-cell insulation information. Quebec spray foam insulation adheres to just about everything so it can be installed over concrete, wood, steel, and most existing roof systems which saves on the expense of roof removal and landfill fees. SPF Roofing installers can spray apply a tapered roof system with the foam which eliminates the need for costly tapered insulation systems. The cants and vertical wall terminations are also spray applied making them an integral part of the roof system and minimizing additional component costs.

The city of Quebec provides spray foam insulation for use in both homes and commercial buildings. Spray Foam can be applied in Attics and Wall Insulation as the most common place in the house. We also see insulation in Canada for Basements, Roof Insulation, and Floors and Garages.

Choosing the right Canadian Spray Foam Contractor in Quebec is easy by using this website. QC insulation contractors are used to provide Energy Efficiency to your home or office. Insulation contractors Seal Air Leaks, create Air Barriers, Sound Reduction, and Building Strength. Improved Air Quality can also result from insulation improvements and weatherization assistance programs. Spray Foam provides a Vapor Barrier, seals and caulks cracks and gaps in your home or buildings structure.