What is an Ice Dam?

An ice dam is a ridge of ice that forms at the edge of a roof and prevents melting snow (water) from draining off the roof. The water that backs up behind the dam can leak into a home and cause damage to walls, ceilings, insulation, and other areas. Figure 1 shows a cross section […]

Preventing Ice Dams

If your home had lots of icicles last winter — or worse, ice dams, which can cause meltwater to back up and flow into your house — take steps to prevent potential damage this year. A home-energy auditor or weatherization contractor can identify and fix air leaks and inadequate insulation in your home’s attic that […]