The cleaning of “after laying” stoneware is mandatory at the end of the building site works. The inadequate or late removal of residues of the grouting used for the joints can leave halos which are difficult to remove. In addition, halos and stains can create in stoneware floors a concrete film able to absorb all sorts of dirt. It is necessary to completely dissolve and eliminate these residues using specific products.
In brief, cleaning floors in porcelain stoneware after laying should be carried out in three phases:
- Preliminary washing on a limited area of a few metres.
- Acid washing on the entire surface and subsequent rinsing (ONLY if the preliminary washing has had a positive result). Repeat the washing and rinsing until all the laying residues and halos have been removed.
- Basic or alkaline washing to avoid greasy residues due to the acid washing, using common degreasing detergents.
The use of buffered acids diluted in water is an excellent solution for washing after laying. These must be totally removed in a short time with the abundant rinsing of the entire floor. It is recommended to repeat washing and rinsing until the complete removal of every halo or residue.