The ever-shifting wintry weather is causing a familiar sight in Douglas County: ice dams.
They occur when heat leaks into an attic and melts the underside of snow on the roof.
If weather conditions are right - an abundance of snow combined with big swings in the temperature - ice dams flourish.
Melted snow flows down the roof surface until it reaches a cold spot, like the eaves or soffit. There, it forms a frozen dam while more snowmelt and ice pile up behind it.
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