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You toss these pucks on the roof, behind the ice dam. They will melt some of the snow and dissolve in the liquid created from this melting. This water mixture will then drain down the roof to the ice dam and work its way through to the gutter or edge of the roof creating a tiny path for water to drain away.
Keeping this in view, is Roof Melt safe to use?
Use Roof Melt tablets to reduce snow and ice buildup that occurs on your roof, typically on the eaves and in gutters. The tablets are specially formulated with calcium chloride so they won't harm your exterior like products such as rock salt, which could rust your gutters and damage shingles.
Also to know, how do you melt ice dams on your roof?
One way to remove an ice dam is to melt it using calcium chloride ice melt. Step 1. Using a roof rake, remove snow 3-4 feet from the edge of your roof, being careful not to damage the roof covering or to allow snow to build up around walking paths or to block emergency exits.
Putting rock salt and ice melt directly on your roof will damage shingles, but by filling the socks with salt and ice melt, tying them off and sticking a few in your gutters, it will help clear them out. While it's rarer, ice damming can also occur on roofs without gutters.