Heating cables can be installed to minimize ice formation and retention on roofs. With them you can prevent a lot of damage to your roof that can result from the buildup of ice dams. While it may seem like the perfect solution to ice dam formation, heat cables do NOT prevent ice dams from forming or get rid of them altogether. In order to prevent ice dams, you need to determine the source of the problem, such as air leaks, lack of ventilation or insulation in the attic. While fixing the above issues could be costly, heat cable are a much cheaper solution .