Sodium chloride or rock salt is highly corrosive.
Throwing rock salt on roof.
Again for the most part you don t want to throw any type of ice melt product on your roof.
It should be no surprise then that it is the first thing many people think of to remove ice dams.
In respect to this can you use rock salt on a roof.
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 will damage the roofing siding gutters and downspouts and the poisonous runoff will kill foundation plants.
No steel comapany that i know of would honor a perforation warranty in this situation.
Use ice melt only when there s no alternative.
A do not put salt on your roof.
Three to four times more expensive than rock salt according to this site.
However rock salt is a form of sodium chloride which corrodes metal including the metal nails holding your shingles in place.
It also does not work well below 20 degrees fahrenheit.
Rock salt can also leave permanent stains on your roof and walls.