White Powder On Concrete Garage Floor

Our contractor states this is a normal occurance but everything that sits on the floor.

White powder on concrete garage floor.

When rubbing it between my fingers the substance feels soft dry and powdery. Efflorescence is caused by vapor migrating through the slab bringing soluble salts to the surface of the concrete. There are two main causes for this. There is also an accumulation of powder near one side of the garage door where nothing in particular normally sits.

We have had a constant issue with our garage floor having an abundant amount of thick white powder substance. When the salt water evaporates it leaves a white powder called efflorescence. It does not feel grainy coarse or abrasive at. Rarely will it cause a problem inside of your garage.

It drips onto the concrete floor seeping into cracks in the concrete. Calcium hydroxide or lime is formed by the hydration reaction between portland cement and water. When we place our car in the garage the snow and salt mixture melts. Efflorescence is normally worn off or washed away on unsealed concrete surfaces.

The first step in the process is drying out the wet conditions in the basement. It s a very common problem in cold climates on garage floors. The white powder is efflorescence or minerals left behind as water that has flowed through the concrete walls evaporates. Instead this powder is a mineral salt that s usually recognized as efflorescence.

Mold is a living organism that occurs in wet environments. Efflorescence will be triggered by low temperatures humidity condensation and rain. Concrete can be stained when salts and other materials will come off the concrete surface. Both can be cleaned.

When moisture and water vapor migrate to the surface of hardened concrete floors walls and colored concrete it carries with it calcium hydroxide. This is a very common occurrence. 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. Picture 1 picture 2 if i touch the substance it moves easily does not stick to the concrete at all.

The usually white powdery surface buildup you see near the cracks in the garage slab is most likely salts leaching out of the concrete. Efflorescence is a white powder created when saltwater evaporates from a masonry surface like concrete. Concrete efflorescence is a very common problem on concrete especially decorative concrete.