When your roof heats up and melts the bottom layer of snow or ice the water leaks down to the edge of your roof and freezes again creating an ice dam.
Salt on roof ice dams.
Rock salt is common for de icing driveways and paths.
Sodium chloride or rock salt is highly corrosive.
However this is no better as chemically they.
Again for the most part you don t want to throw any type of ice melt product on your roof.
A do not put salt on your roof.
It should be no surprise then that it is the first.
What kind of salt can you put on your roof for ice dams.
Some people use table salt for de icing instead of rock salt.
Emphasis on the as possible part.
Simply toss tablets onto the ice dam in clusters.
Ask this old house general contractor tom silva explains the best ways to keep your roof and gutters free from those dreaded ice dams.
Roofmelt works to 20f made of 100 calcium chloride.
It will damage the roofing siding gutters and downspouts and the poisonous runoff will kill foundation plants.
See below for a shopp.
Tablets melt thru ice dams allowing water to drain safely.