How to Insulate an Ice Dam

Ice dams are a frustration familiar to anyone that lives in a climate that sees frequent snowfall. Ice dams form when snow melts, runs down a roof and then refreezes in a dam shape. Water, ice and other materials can build up behind the dam and cause extensive damage to your roof. Proper insulation in the attic beneath the roof is one of the keys to preventing ice dam damage.

Instructions

1. Inspect insulation to see if it is water-logged. Among the leading causes of damage related to ice dams is insulation that has been soaked by roof leaks. The more heat that is lost due to compromised insulation, the more ice dam-related problems you will see, so first identify the insulation that has been soaked in your manning.

2. Replace any insulation that has been compromised due to roof leaks. Depending on the climate in your area, R-38 or better insulation will usually suffice to ensure good attic insulation. Cellulose insulation is more susceptible to roof leak damage, so use another material if one is available to you.

3. Repair any roof leaks over the attic. It bears repeating that roof leaks are the major cause of damage related to ice dams, so repair any leaks in your roof that could compromise the effectiveness of your newly installed insulation.

References

• University of Massachusetts Amherst; Preventing Ice Dams; Paul Fisette
• University of Minnesota Extension; Ice Dams; Timothy Larson, et al
• State Farm Insurance: Ice Dams And Attic Condensation