Illinois winters create ideal conditions for ice dams — melting and refreezing snow at the eaves can force water behind shingles and into the home. Understand the causes, risks, and the preventative steps to protect your attic, insulation, and interior walls.

Uneven snow melt on your roof is a major warning sign of poor attic ventilation. When warm air gets trapped in the attic, it leads to heat loss, ice dams, mold, and premature shingle failure. Here’s how to spot the problem and protect your home this winter.