Ice dams form when snow on your roof melts during the day due to heat escaping from your home, then refreezes at the colder eaves, creating a barrier that traps water. This standing water can seep under shingles, leading to leaks and interior damage. The main causes are insufficient attic insulation and poor ventilation, which allow warm air to rise and melt snow unevenly. You can do simple checks yourself by inspecting your attic in winter: look for warm spots on the roof deck, or feel for airflow near soffit vents. Clear gutters regularly to ensure proper drainage and use a roof rake to remove excess snow safely from the edge of your roof. Avoid breaking or prying ice dams as this may damage your shingles or gutters.
If ice dams have damaged your roof or if you suspect mold or leaks inside, it’s time to call a roofer. Ask contractors about their experience with ice dam repairs and prevention because not every roofer specializes in these issues. A key question is whether they recommend improving attic insulation or ventilation as part of the fix, since addressing the root cause is crucial for lasting results. Also, check if the repairs they propose will void or maintain your roof warranty, as some alterations can affect manufacturer coverage. Proper diagnosis combined with professional intervention can help keep your home dry and comfortable throughout winter.