How to Prevent Ice Dams – Start in Your Attic
By Mark J. Donovan
||To prevent Ice dams all that is typically required is the installation of additional insulation and better air ventilation in the attic.
Ice Dams occur at the edge of a roof, because the attic is not properly insulated and vented. The attic air temperature should be as close to the outside ambient air temperature as possible to prevent ice dams. If it is above freezing in the attic, while the outside air temperature is below freezing, melting of snow on the roof will occur.
During the night, as the temperature drops, the melting snow will turn to ice, thus forming the ice dams.
If you are observing Ice Dams examine your attic and check for the following:
- Make sure there is at least R-30 attic insulation between the ceiling joists.
- Make sure that there are no un-insulated gaps.
- Make sure all bathroom ceiling fans are vented to the outside and not just vented into the attic. If the ceiling fans are only vented into the attic they will send warm moist air into the attic, which will heat the attic and cause melting on the roof, which leads to the Ice dams.
With the above tips you should be able to prevent ice dams and the resulting water and structural damage that comes with them.
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