It is a bad idea to use rock salt on your roof for a number of important reasons.
Is rock salt bad for roofs.
Rock salt can also leave permanent stains on your roof and walls.
For these reasons rock salt is not a good choice when it comes to getting rid of ice dams.
It also does not work well below 20 degrees fahrenheit.
You ve seen what road salt does to the undercarriage of cars in the winter how it can rust and destroy a car.
If allowed to flood or cover plants without proper dilution it can cause damage to the plant roots and leaves.
I have a low pitch roof with grace ice and water shield with asphalt shingles.
Why you shouldn t use rock salt on your roof while it works and will remove snow and ice from your roof and prevent accumulation it is not recommended to use rock salt on your roof.
Damage to plants and landscape.
Space them every 3 4 feet.
I shoveled it yesterday and made calc chlor lines through the ice dam and it drained off in.
It will damage the roofing siding gutters and downspouts and the poisonous runoff will kill foundation plants and more.
Corrosion and rusting of other parts of the home such as siding and gutters.
Tummy aches or worse for any animal or person who likes to eat snow.
Aside from its direct damage to a roof using rock salt on your rooftop can have other harmful consequences.
If handled properly it will not.
Shovel the problem areas or clear with roof rake.
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.
Saltwater leaking into your home as a result of said leaks.
If you are going to.
Rusted roofing nails and flashing which may lead to rust streaks on your roof.
However rock salt is a form of sodium chloride which corrodes metal including the metal nails holding your shingles in place.
In short rock salt can compromise the integrity of a sound roof by corroding the materials that help keep it together.
I would suspect that you would risk damaging the shingles and perhaps other parts of the building.
Salt is really hard on a lot of building materials especially masonry and it s effect on water.
Sodium chloride or rock salt is highly corrosive.
Make a line perpindicular to the gutter going up the roof 3 feet or so.