The first thing to remember is cars carry in snow and ice slush on the underside of the car body.
White powder on concrete garage floor.
The usually white powdery surface buildup you see near the cracks in the garage slab is most likely salts leaching out of the concrete.
When the salt water evaporates it leaves a white powder called efflorescence.
Efflorescence is caused by vapor migrating through the slab bringing soluble salts to the surface of the concrete.
Efflorescence is a white powder created when saltwater evaporates from a masonry surface like concrete.
When moisture and water vapor migrate to the surface of hardened concrete floors walls and colored concrete it carries with it calcium hydroxide.
Mold is a living organism that occurs in wet environments.
Concrete efflorescence is a very common problem on concrete especially decorative concrete.
It does not feel grainy coarse or abrasive at.
Calcium hydroxide or lime is formed by the hydration reaction between portland cement and water.
If the white powder is creating up on your concrete surfaces only then the substance is most likely not mold.
When we place our car in the garage the snow and salt mixture melts.
Both can be cleaned.
Instead this powder is a mineral salt that s usually recognized as efflorescence.
It drips onto the concrete floor seeping into cracks in the concrete.
The stains are normally white and are present in darker colors more than white or pale colors due to the contrast created by the chemical reaction.
There is also an accumulation of powder near one side of the garage door where nothing in particular normally sits.
Our contractor states this is a normal occurance but everything that sits on the floor.
Rarely will it cause a problem inside of your garage.
We have had a constant issue with our garage floor having an abundant amount of thick white powder substance.
This is a very common occurrence.
When rubbing it between my fingers the substance feels soft dry and powdery.
Concrete can be stained when salts and other materials will come off the concrete surface.
Efflorescence is the white powdery substance on the surfaces of unsealed concrete and the white blush seen with sealed floors.
Efflorescence is normally worn off or washed away on unsealed concrete surfaces.
Efflorescence will be triggered by low temperatures humidity condensation and rain.
Picture 1 picture 2 if i touch the substance it moves easily does not stick to the concrete at all.
It s a very common problem in cold climates on garage floors.
