Two effective ways to prevent ice dams on gutter guards are to rake snow from the building's roof before it melts or to install a heating cable in the gutter. Homeowners use a special tool to regularly remove snow, but an electrician installs the heating cable.
Roof rakes have long handles to reach the roof from the ground. Most are aluminum, and some have wheels to prevent damage to the roof. Raking the roof works by removing snow before it melts from warm attic air and refreezes in the cold gutters. A heating cable lies flat inside the gutter and works by allowing melted snow from the roof to stay melted and flow out of the gutters.