How it works
Ice dams form when the upper roof stays above freezing while the edge stays below it. Snow melts higher up, runs down and freezes again at the cold eave. University of Minnesota Extension traces the heat mainly to the house itself, with air leaking into the attic as the main path in many homes.
Removal deals with the ice that is there now. It does not stop the next one; that takes air sealing and insulation in the attic.
- Snow comes off the roof first, which removes one of the things an ice dam needs.
- The crew melts channels and cuts the dam apart with steam, which the state energy office recommends over chippers, chemicals or open flame.
- Water behind the dam drains off once the channels are through.
- Inside, wet areas are dried before any repair, as University of Minnesota Extension advises, to keep mold from starting.
When to call
Call when water is showing inside, when the ice is too high to reach safely from the ground, or when a ladder or the roof itself would be needed. Extension warns that anyone working on a winter roof risks injury and damage.
- Icicles or ice along the roof edge fixes now
- Water stain on the ceiling in winter fixes now
Ice Dam Removal by state
| State | License rule | Busiest months | Confirmed businesses |
|---|---|---|---|
| Minnesota | Contractors who work for homeowners in more than one skill area need a state license as a building contractor, remodeler or roofer, and roofing alone needs one too. License numbers begin BC, CR or RR. | Dec, Jan, Feb, Mar | 228 in Minnesota |
Sources
Guides on ice dam removal
- How to Remove Ice Dams in MinnesotaIf water is coming in, hire an ice dam removal service that uses steam, as the Minnesota Department of Commerce advises, and skip chipping, chemicals and open heat. If the house is dry, rake snow off the lower roof from the ground. Then seal the attic air leaks that cause ice dams.
- How to Use a Roof Rake in MinnesotaRake the lower roof from the ground after heavy snow, and leave an inch or two of snow on the shingles. Keep the pole 10 feet from power lines and never use it from a ladder. If the roof sags or creaks, or the snow is out of reach, stop and hire a professional.
How to get a quote
Pick a business from the list and use the contact form or phone number on its own website. Asking two or three lets you compare. Cold Home Guide does not take quote requests.