How to Stop Icicles and Ice Dams Before They Start
Posted on Wed, Jan 04, 2012 @ 09:00 AM
What is an Ice Dam?
An ice dam is a ridge of ice that forms at the edge of a roof and prevents melting snow (water) from draining off the roof. The water that backs up behind the dam can leak into your home causing damage to walls, ceilings and insulation.
What are the causes of icicles and ice dams?
Icicles and ice dams form in the gutters and along roof edges when snow melts on your roof and meets the cold air of the roof edges. The melting snow is actually being caused by energy leaking from your home. As warm air from the inside of your home rises into the attic, it warms the roof, causing snow to melt and often, creating an ice dam. The ice dam enables the trapped water to get under the roof shingles, causing water to leak inside.
What if you have an ice dam now?
Hire an expert to solve the immediate issue. Don't climb on your roof, and avoid standing on the ground and 'chipping away' at the ice. Not only could you damage the roof, but you can be seriously injured by falling ice or debris.
Preventing Future Ice Dams:
NYSERDA recommends the following ice dam prevention tips:
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Seal air leaks. Seal air leaks in your attic to stop warm air leakage, the source of ice dam problems.
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Add insulation. After sealing leaks, add insulation in your attic.
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Check ventilation. Provide adequate ventilation so the underside of the roof and outside air are at the same temperature. Check to make sure attic insulation is not blocking roof ventilation.
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Clean gutters. Clean leaves and other debris from gutters before the first snow.
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Hire an accredited contractor. Hire a Home Performance contractor accredited through the Building Performance Institute (BPI) to conduct an in-home comprehensive energy assessment, also called an "energy audit." This audit will not only suggest specific improvements to prevent future ice dams, but will recommend ways to reduce energy use, save money and improve the health and safety of your home.
