Ice dams are one of the most destructive winter roofing issues in Connecticut — particularly in Hartford County, the Litchfield Hills, and eastern CT where heavy snowfall and freeze-thaw cycles combine. Understanding ice dam formation is the first step to preventing them.
Why ice dams form: Heat escaping through inadequately insulated attics melts snow on the upper roof. Meltwater flows downward and refreezes at the cold eaves, creating an ice dam that forces water under shingles and into the home — causing ceiling, wall, and insulation damage.
Ice dam prevention — the right way:
- Attic insulation: CT building code requires R-49+ for new construction — many older CT homes are significantly under-insulated. Adding insulation is the single most effective ice dam prevention measure.
- Attic ventilation: Balanced intake at soffits and exhaust at ridge keeps the roof deck uniformly cold in winter, preventing uneven melting.
- Ice-and-water shield: Applied at eaves during roof replacement — CT code requires minimum 24 inches; quality CT roofers apply 36–48 inches or full coverage in Litchfield Hills and inland communities.
Emergency ice dam removal: Steam removal is the safe, professional method — costs $500–$1,500 depending on size. Avoid rock salt (damages shingles and gutters) and chopping (damages roofing materials and creates warranty issues).