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Reduce Damage Caused by Ice Dams & Icicles

icedamhousepic2 (1)Sealing your ducts with Aeroseal technology may address the root cause of ice dam and icicle formation on your eaves. If you live in a snowy climate, you are more than likely familiar with icicles and ice dams.  They are the thick bands of ice that form along the eaves of your home.  They may be pretty to look at, but water-stained ceilings, dislodged roof shingles, sagging gutters, peeling paint, and damaged plaster are all results of ice dams.

ice-dam-1 What is the cause?  Heat and warm air leaking from the air ducts in the living space of your home, warms the bottom of the roof deck.   Then, as the diagram on the right illustrates, this heat loss melts the snow on the shingles, then the melted snow and ice runs down to the colder edge of the roof (above the eaves) and refreezes.  More snow on the roof insulates the roof deck a little more. This allows heat to stay in the attic, which in turn makes the roof even warmer and melts more snow.

In the worst cases, water builds up through holes in the insulation or by condensing under the plywood.  This causes ice to form on the underside of the plywood which melts and drips into the insulation.  This causes water damage and lowers the effectiveness of the insulation.   It can also cause mold and mildew to form on the surfaces of the ceilings and walls. This mold can get into the attic and into your heating system through the unsealed returns and those with allergies will suffer.

The way to prevent ice dams from forming is to keep the entire roof cold. In most homes this means blocking all air leaks leading to the attic from the living space below. That’s where Aeroseal technology comes in; unless the ice dams on your home are largely due to poor insulation in your attic, the problems associated with ice dams and icicles are greatly reduced when you have your ducts sealed with Aeroseal.