One thing that homeowners dread during snowy weather is the formation of ice dams along the edge of the roof.
An ice dam earns its name by trapping pools of melted water behind the frozen dam created when melted snow re-freezes along the eaves, where the roof is coldest.
Water trapped behind an ice dam can flow under roof shingles and leak into the house, damaging walls, floors, and other materials. Several conditions must exist for ice dam damage to occur (see sidebar below). If all these conditions are present, it’s likely that some water will leak into your house.