Different methods for renovating a concrete floor


The renovation of an old concrete floor is worthwhile for a fundamentally stable substance. Damage or dirt on the surface can almost always be remediated. If efflorescence from the depth of the concrete is present or recurring moisture decomposes parts of the concrete floor, remediation may not be possible in some cases.

Damage analysis determines method

The range of methods and means for the rehabilitation of a concrete floor is large. After the damage analysis, the potential options must be examined. From the repair of individual items to full-surface repairs, the variants are sufficient.

If there are cracks or holes in the concrete floor, usually the number and size decide on the procedure. Important is the complete removal of all damaged concrete parts. When repairing concrete floors, the damage is individually exposed and mechanically "cleaned". For this, all holes and cracks must be knocked open before repairing and freed from chunks, sand and dust.

Mending is always a requirement

When renovating the complete concrete floor surface is planned, the individual repairs are a preparatory step. Before applying a new concrete floor coating or leveling or smoothing, the repairs are necessary.

Defective areas can also be exposed to the abrasion. In particular, if the rehabilitation project involves later sanding of the entire surface, this approach is obvious. When renovating, it must also be considered whether the concrete floor has a continuous structure or consists, for example, of floor slab and screed.

Fix deep damage

In the case of deep-seated damage, it is inevitable during renovation to get to the root of the damage in the truest sense of the word. In the case of salt efflorescence, the concrete floor must be exposed or pricked up to the location of the cause. "Infested" areas must be desalinated. If this is no longer possible, only a removal and new floor casting helps.

The situation is similar with corrosion damage. Typical cause are steel reinforcements, which damage the concrete floor from the inside. The rusty reinforcements must be completely exposed and de-rusted. Special sheathing mortar may prevent renewed corrosion after complete removal.

Tips & Tricks

Imagine the damage analysis before renovation, the concrete floor corresponds to a biological organism or body. All "sick" areas must be completely removed and healed so that the entire floor is "healthy" again.


Video Board: How to Resurface Concrete