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.

White powder on concrete garage floor.

Our contractor states this is a normal occurance but everything that sits on the floor. If the white powder is creating up on your concrete surfaces only then the substance is most likely not mold. Efflorescence is caused by vapor migrating through the slab bringing soluble salts to the surface of the concrete. When moisture and water vapor migrate to the surface of hardened concrete floors walls and colored concrete it carries with it calcium hydroxide.

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. Calcium hydroxide or lime is formed by the hydration reaction between portland cement and water. There are two main causes for this.

It does not feel grainy coarse or abrasive at. Efflorescence is the white powdery substance on the surfaces of unsealed concrete and the white blush seen with sealed floors. Both can be cleaned. We have had a constant issue with our garage floor having an abundant amount of thick white powder substance.

Rarely will it cause a problem inside of your garage. 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. When the salt water evaporates it leaves a white powder called efflorescence.

It s a very common problem in cold climates on garage floors. Concrete efflorescence is a very common problem on concrete especially decorative concrete. The first step in the process is drying out the wet conditions in the basement. When rubbing it between my fingers the substance feels soft dry and powdery.

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 normally worn off or washed away on unsealed concrete surfaces. The first thing to remember is cars carry in snow and ice slush on the underside of the car body.

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. Mold is a living organism that occurs in wet environments. There is also an accumulation of powder near one side of the garage door where nothing in particular normally sits.