Ice Dams <UPDATED>

Water trapped behind the ice dam backs up under shingles, causing leaks into the house, damaging insulation, walls, and ceilings.

Ice dams can become extremely heavy, tearing off gutters and loosening shingles. ICE DAMS

Preventing ice dams involves maintaining a cold roof by minimizing heat escape from the home. How to Prevent Ice Dams on Your Roof - Allstate Water trapped behind the ice dam backs up

Unseen, lingering moisture in the attic or walls can lead to mildew or mold growth. causing leaks into the house