How to stop ice dams from growing on your roof this winter
In short: General contractor Tom Silva demonstrates practical techniques to manage ice dams. Learn how to address existing buildup and insulate your attic to prevent future damage, ensuring your roof stays cold and protected during freezing temperatures.
Ice dams form when heat escapes into the attic, warming the roof and causing snow to melt and refreeze at the eaves. To stop an active dam, Tom Silva suggests placing a paper bag filled with ice melt behind the obstruction. Another effective method involves using a fan inside the attic to blow cold air directly toward the eaves, which cools the roof surface and halts the dam's growth.
Long-term prevention requires super-insulating the attic to keep heat from reaching the roof deck. These methods help homeowners maintain a consistent roof temperature, preventing the cycle of melting and freezing that leads to structural issues.
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Sources
- Summary by Intellect · source: How to Prevent Ice Dams | This Old House
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