White Powder On Concrete Garage Floor

It drips onto the concrete floor seeping into cracks in the concrete.

White powder on concrete garage floor.

The white powder is efflorescence or minerals left behind as water that has flowed through the concrete walls evaporates. The usually white powdery surface buildup you see near the cracks in the garage slab is most likely salts leaching out of the concrete. Our contractor states this is a normal occurance but everything that sits on the floor. Efflorescence will be triggered by low temperatures humidity condensation and rain.

Concrete efflorescence is a very common problem on concrete especially decorative concrete. We have had a constant issue with our garage floor having an abundant amount of thick white powder substance. Efflorescence is a white powder created when saltwater evaporates from a masonry surface like concrete. Concrete can be stained when salts and other materials will come off the concrete surface.

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. 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.

Both can be cleaned. Instead this powder is a mineral salt that s usually recognized as efflorescence. When the salt water evaporates it leaves a white powder called efflorescence. This is a very common occurrence.

When moisture and water vapor migrate to the surface of hardened concrete floors walls and colored concrete it carries with it calcium hydroxide. Rarely will it cause a problem inside of your garage. The first thing to remember is cars carry in snow and ice slush on the underside of the car body. Mold is a living organism that occurs in wet environments.

There are two main causes for this. Efflorescence is the white powdery substance on the surfaces of unsealed concrete and the white blush seen with sealed floors. 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.

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. 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.