Is it okay to use some rock salt on the edge of the roof to deal with ice dams? - David, E. Bridgewater
Better not to. We talked to Tom Silva from “This Old House” about what people should and should not be doing about ice dams and he says rock salt will stain your shingles. Instead, he suggests using potassium chloride ice melter.
And here’s more information for you about snowy roofs.
Are you having roof problems?