They work effectively in temperatures down to 25 degree fahrenheit.
Roof ice pellets.
In the end i still had to remove the snow and ice.
The roof melt tabs melt through the ice to the roof and then drains under the ice instead of backing up into the attic.
See below for a shopp.
The picture below is the ice dam that fell off my roof after melting from below.
2 ice dam pellets solid granular solid pellet form safe on roofing materials and vegetation below non corrosive non chloride safest temps 5 f order now.
These melted the ice dam from below allowing water to drain off the roof.
The roof melt ice melt is designed to eliminate the need to climb onto roofs while melt snow.
The hockey puck sized pellets only melted a whole in the ice or snow resulting in no improvement to eliminating ice dams or snow from the roof.
Ask this old house general contractor tom silva explains the best ways to keep your roof and gutters free from those dreaded ice dams.
I ordered extra to have on hand for the future.