Before we can explain how to prevent an ice dam from forming on your roof let us first explain what an ice dam is, what causes them, how they are formed and why we have to get rid of them in the first place.
An ice dam is nothing more than a ridge of ice that forms at the bottom edge of your asphalt shingle roof that prevents snow from draining off your roof. They are formed when the heat from inside your home rises through your ceiling and the attic and warms the roof surface. This is turn causes the bottom layer of snow to melt and flow down to the parts of the roof that remain below the freezing point.
This is easily visible on houses that have a section of the roof that extends past the structure of the home. So how is this harmful? The water that flows down freezes and forms a layer of ice that prevents the melting snow from flowing off of the roof. The water that is being held back from the damn will then begin to freeze. From this point the water can seep under the shingles and freeze pushing the shingles up and allowing more water to seep in under the roof covering and possibly into parts of your home. So how can this be prevented?
How to Prevent an Ice Dam
Since the main culprit of the formation of an ice dam is indoor heat loss the easiest way to prevent them from forming is keeping a consistent temperature in your attic. If you ask any shingle roofing contractor, the best way to ensure consistent temperatures is proper insulation and ventilation.
The experts at Global Home Improvement will inspect your ceiling and attic insulation to make sure there are no areas for heat loss that can affect your asphalt shingle roof or fiberglass shingle roof. It will be necessary to seal any gaps around pipes, cables, and wiring that were previously drilled through the attic floor. From the inside of your home you may have to weather strip your attic door and seal any recessed light fixtures. And, while it may seem counter-intuitive, you have to keep attic vents open so the air temperature under the roof is the same as the air temperature over the roof.
For more information on Preventing Ice Dams or to set up a free in-home estimate call Global Home Improvement at 888-234-2929 or visit online.
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