If you have a gutter that drains near or on a concrete sidewalk or driveway the corrosive effect will quickly become apparent.
Rock salt damage roof.
Sodium chloride or rock salt is highly corrosive.
Will rock salt or calcium chloride damage aluminum shingles.
Aside from its direct damage to a roof using rock.
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.
Discolored shingles dead shrubbery dead grass discolored driveway sidewalks or front stoop corroded gutters and downspouts rust and pits.
It also does not work well below 20 degrees fahrenheit.
Rock salt may not damage the shingles themselves but it can cause the nails holding your shingles to the roof to corrode.
If you are going to.
In short rock salt can compromise the integrity of a sound roof by corroding the materials that help keep it together.
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.
For these reasons rock salt is not a good choice when it comes to getting rid of ice dams.
Think about a constant trickle of saltwater hitting the same area day after day as the snow and ice melt from your roof.
However rock salt is a form of sodium chloride which corrodes metal including the metal nails holding your shingles in place.
Because salt is corrosive it can have a very damaging effect on sidewalks over time.
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 turn this rust can cause stains and streaks on your roof.
No steel comapany that i know of would honor a perforation warranty in this situation.
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.
Have a shallow 2nd story part of the roof with aluminum shingles and ice dams starting to cause problems.
There is a very good chance that the rock salt will cause premature corrosion of the metal panels.
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.
It s all but impossible to be effective with a roof rake due to the slope and a treeline getting in the way.
It rusts nail heads.
Additionally if they get too bad the nails can rust through and break thus causing your shingles to become loose and get damaged.
As a result it can cause damage to vulnerable parts of your roof including nail heads and aluminum flashing.
I know it d be bad for steel but will it corrode aluminum.
It will damage the roofing siding gutters and downspouts and the poisonous runoff will kill foundation plants and more.
