Before the floor covering work the customer should make a rough preparation of the existing floor. The sub-floor requirements are as follows:
- Type of concrete as in the project, but not less than M 200.
- Thickness of concrete at least 80 mm.
- The mandatory polishing of the floor to open the pores of concrete for primer impregnating. Class of the roughness - 2.
- On the concrete surface, prepared for application of anti-corrosion protection, should not be fittings, sinks, sagging, edges, oil stains, dirt and dust.