A do not put salt on your roof.
Throwing rock salt on roof.
It will damage the roofing siding gutters and downspouts and the poisonous runoff will kill foundation plants.
It also does not work well below 20 degrees fahrenheit.
Why you shouldn t use rock salt on your roof in their determination to melt away ice dams growing on their roof s eave and thus potenti rock salt s ability to damage driveways and other outdoor pavements is relatively well known but there is another place where rock salt can do damage to your home on the roof top.
Three to four times more expensive than rock salt according to this site.
Use ice melt only when there s no alternative.
Sodium chloride or rock salt is highly corrosive.
While it s rarer ice damming can also occur on roofs without gutters.
Again for the most part you don t want to throw any type of ice melt product on your roof.
In respect to this can you use rock salt on a roof.
Rock salt can also leave permanent stains on your roof and walls.
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.
It should be no surprise then that it is the first thing many people think of to remove ice dams.