Sodium chloride is not due to it s corrosiveness tags.
Rock salt on roof shingles.
Ice dam calcium chloride.
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.
Packaged in a resealable bag for easy storage melt can be conveniently dispensed directly out of the bag or into a hand held or wheeled salt spreader.
When the snow melts the dam can route water under roof shingles and cause roof damage.
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Melt calcium chloride crystals effectively melt ice and snow on.
Proven safer when applied to quality concrete surfaces melt exhibits the following properties.
Is calcium chloride safe to use on roofs.
The key to using ice melt to prevent ice dam roof leaks and plugged.
However rock salt is a form of sodium chloride which corrodes metal including the metal nails holding your shingles in place.
Rock salt can also leave permanent stains on your roof and walls.
Melts down to 25 f.
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In their determination to melt away ice dams growing on their roof s eave and thus potentially prevent leakage and damage to their home s interior many reach for.
Why you shouldn t use rock salt on your roof.
It should be no surprise then that it is the first thing many people think of to remove ice dams.
Haven t noticed any issues in the 15 or so years i have been at this home.
Best answer 10 years ago reply upvote.