LeafFilter does not prevent nor cause ice dams. Ice dams are caused by a loss of heat within your roof. As heat rises, it often becomes trapped in your home’s attic space. From here, it can warm the roof where insulation is ineffective, damaged, or lacking. Essentially, when the highest points of your roof are above the freezing point, snow will melt from this portion of your roof and will slide down to the lower, less insulated portions that are below the freezing point. If you witness ice dams, heat tape is a great option to explore for your home.