The threat posed by ice dams

11/18/2019 (Permalink)

Old man winter has finally reached Davidson County and cold, snowy weather can present various issues for homeowners to contend with. One such problem, ice dams, can cause damage to walls, ceilings and other areas.

The University of Minnesota Extension says that an ice dam is a ridge of ice that forms at the edge of the roof and prevents melting snow from draining properly. A complex combination of heat loss from a home, snow cover and outside temperatures can lead the formation of ice dams. An ice dam will be fed by melting snow above it and cause a backup at the edge of the roof.

Dams can cause gutters to tear off and loosen shingles and may lead to water backing up and pouring into the home, advises This Old House. Ice dams also can contribute to soggy insulation, making the insulation lose its protective R-value and becoming a magnet for mold and mildew.

Homeowners can do several things to temporarily prevent the formation of ice dams. Heated cables clipped to the roofs edge in a zigzag pattern can help prevent dams that lift shingles. Pushing snow off the roof can help. Laying an ice melt product in gutters to help melt the ice that forms also can prevent ice dams.

More permanent solutions involve keeping the entire roof the same temperature as the eaves by increasing ventilation, adding insulation and properly sealing air leaks that can warm the underside of the roof. This may involve calling in a professional contractor. Such an investment is well worth it, as it can prevent much more costly damage down the line.