Inadequate Attic Insulation Can Cause Snow Melt Issues

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Insufficient attic insulation during the winter can lead to heat escaping from the living space into the attic, warming the roof deck from underneath. This can cause snow on the roof to melt unevenly, with the warmer parts of the roof melting first. The melted water then runs down to the colder edges and overhangs, where it refreezes, creating ice dams that can trap water and lead to roof leaks, damaged drywall, mold growth, and other costly issues.

Why it matters

Proper attic insulation is crucial for maintaining a comfortable indoor temperature, reducing energy costs, and protecting the roof and home from potential water damage caused by ice dams. Uneven snow melt on the roof is a telltale sign that a home may have inadequate insulation.

The details

When heat escapes from the living space into the attic, it warms the roof deck from underneath. This causes the snow on the warmer parts of the roof to melt first, while the colder edges and overhangs remain frozen. The melted water then runs down to these colder areas and refreezes, creating ice dams. These ice dams can trap water behind them, forcing it up under the shingles and leading to leaks, damaged drywall, mold growth, and other costly issues.

• The recent snowfall in the area has highlighted the issue of uneven snow melt on roofs.

What’s next

Homeowners should have their attic insulation inspected and upgraded if necessary to prevent heat loss, uneven snow melt, and the formation of ice dams that can lead to costly roof and home repairs.