As a result it can cause damage to vulnerable parts of your roof including nail heads and aluminum flashing.
Rock salt damage roof.
If you are going to.
Rock salt may not damage the shingles themselves but it can cause the nails holding your shingles to the roof to corrode.
Rusting nail heads can cause aesthetically unpleasant staining but more importantly they can result in loose roofing materials that can easily tear off during stormy weather.
Discolored shingles dead shrubbery dead grass discolored driveway sidewalks or front stoop corroded gutters and downspouts rust and pits.
Rock salt is corrosive in nature.
Unlike other substances salt won t impair your cognitive functions but people might conclude otherwise if they see what you ve done to your roof and property.
I know it d be bad for steel but will it corrode aluminum.
For these reasons rock salt is not a good choice when it comes to getting rid of ice dams.
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.
In short rock salt can compromise the integrity of a sound roof by corroding the materials that help keep it together.
In turn this rust can cause stains and streaks on your roof.
It will damage the roofing siding gutters and downspouts and the poisonous runoff will kill foundation plants and more.
Very little ice melt will be used in this manner actually 4 lbs sock can last til the first real thaw and no damage to roof or gutters will occur in comparison to thousands of dollars of water damage to property without ice melt socks.
Sodium chloride or rock salt is highly corrosive.
Additionally if they get too bad the nails can rust through and break thus causing your shingles to become loose and get damaged.
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 potentially prevent leakage and damage to their home s interior many reach for the deicer they are most familiar with rock salt as the solution.
It s all but impossible to be effective with a roof rake due to the slope and a treeline getting in the way.
It also does not work well below 20 degrees fahrenheit.
Aside from its direct damage to a roof using rock.
Will rock salt or calcium chloride damage aluminum shingles.
It rusts nail heads.
Rock salt can also leave permanent stains on your roof and walls.
However rock salt is a form of sodium chloride which corrodes metal including the metal nails holding your shingles in place.
Think about a constant trickle of saltwater hitting the same area day after day as the snow and ice melt from your roof.
No steel comapany that i know of would honor a perforation warranty in this situation.
Second is to lay the sock vertically up the roff so it crosses the ice dam.
If you have a gutter that drains near or on a concrete sidewalk or driveway the corrosive effect will quickly become apparent.
