Ice dams form because the edges of a home’s roof are colder than the upper regions (where more insulation is below), causing ice to form around the eaves. Snow melts above, and the melted snow backs up behind a “dam” of ice, potentially causing leaks and permanent damage to the roof and home — if you’ve ever experienced an ice dam on your roofline, you know what a nightmare it can be.
Here is how to prevent ice dams from forming, and what to do if you notice one getting started. (Hint: Prevention is far easier than treatment!)
Before winter weather sets in:
- Remove debris from gutters — water can back up, causing leaks and ice dams or damage to your roof and siding.
- Inspect and upgrade attic insulation and ventilation.
- Purchase a roof rake.
- Remove snow as quickly as possible from the roof after storms. Use your roof rake to regularly remove it (or hire someone to do this for you).
What to do if you notice the beginnings of an ice dam:
- Carefully remove snow and ice if possible without damaging roof and gutters.
- If you have heat cables, turn them on. Heat cables cannot prevent or fully remove ice dams, but can melt enough of the ice to create a channel for water to flow out, preventing some damage.
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