We recommend hiring a trained professional to treat ice dam-related problems and investigate insulation and attic ventilation best practices that may prevent ice dams. However, there are ice melt products available on the market designed to be thrown onto the roof where ice dams have built up to create channels that allow melting snow to drain off the roof. Most common ice melt products contain chlorides, including hygroscopic (moisture-attracting) products like calcium chloride and magnesium chloride, which are very effective in melting ice. It’s important to be aware of the risks involved and take precautions to maintain proper drainage, as water from melting ice can corrode roofing nails and steel gutters, and could get under shingles, potentially damaging wood products. Additionally, hygroscopic ice melt products may cause water to evaporate at a slower rate and remain damp longer than naturally melting water. You should also prevent the water from draining directly onto vegetation, including shrubs, bushes, and evergreens.