Testing of the tiled surface and cleaning after installation


The testing of the tiled surface must be done by the final customer in the presence of the installer or the foreman responsible for the works and consists of a visual examination (naked eye and/or with glasses if normally worn) of the surface from a distance of 1 meter.
An “effect” which is only visible close-up or with grazing light, perhaps with the use of a magnifying glass cannot be considered a “defect”.
An “effect” becomes a “defect” only when clearly visible under the conditions stated above.


The cleaning of the entire flooring after installation is of vital importance for all subsequent maintenance procedures.
Cleaning eliminates residues as well as dirt such as cement, glue, paint and other kinds of dirt, etc. Once the grout has aged properly, the cleaning using a suitable detergent can begin, but must be carried out in strict accordance of the instructions of use and dilution percentages stated by the manufacturer of the detergent.

a) Ceramiche Marca Corona recommends FILA DETERDEK (or any other equivalent buffered non organic acid cleaner, with the exclusion of hydrofluoric acid) for the removal of cementitious grout residues. Follow instructions below:
• Use FILA DETERDEK diluted 1:5 (1 litre FILA DETERDEK in 5 litres of hot water, result: 1litre/40Sq meter);
• Sweep the floor accurately, and wet the grout joints with water to protect them from the corrosive action of the acid;
• Sweep the floor and then spread the diluted acid solution evenly using a scrubbing-brush, a mop or a rough cloth for residential floors, while larger surfaces should be cleaned using a single-brush equipped with white or green buffering disks (depending on the necessity);
• Leave the detergent to act for a few minutes depending on the amount and type of dirt;
• Use an abrasive sponge such as a white or green scotch-brite or a scrubbing-brush with nylon bristles for textured surfaces, or, in the case of large surfaces with a singlebrush equipped with green disks and liquid suction capability;
• Collect any residue using a cloth or the liquid suction equipment;
• Rinse with lukeworm or hot water repeating the operation more than once until complete elimination of any rim or dirt residue present on the cavities of textured tiles.

Should some areas of the floor remain dirty, repeat the acid washing with a higher concentration of cleaner.

This procedure can be aggressive towards materials and objects placed close to the tiled surface; for example doors and window sills made of marble, metallic shutters, decors, etc.; it is advisable to protect these materials before proceeding with the cleaning.

For floor and wall tiles with metal profiles, please read the PDF below with useful instructions for laying and cleaning 




b) For the removal of epoxy grout residues it is absolutely necessary to follow carefully the indication of the cleaner manufacturer, as this can be particularly challenging. Marca Corona recommends warm water and 10% of alcohol or, as an alternative, an alkaline cleaner like FILA PS/87 (or equivalent). PS/87 should be applied not diluted on the floor, and let act for about 30 minutes. Then scrub the floor with an abrasive brush and rinse with abundant water.

c) For Polished, Semi-Polished and Metallic porcelain any acid cleaner should be tested on a small area, before cleaning the entire floor.
d) Textured porcelain, or products with high anti-slippery characteristics may be cleaned several times, utilizing increasing concentrations of detergent and a more abrasive brush, as this type of products may retain more dirt and grout residues. Proper cleaning will restore the original beauty of the product and its anti-slippery characteristics.
e) Matte finish products (non-polished) should not be sealed. If not properly removed, an excess of sealer could actually cause the floor to retain dirt faster.
f) For used floors, before performing any acid cleaning, it is important to remove all the organic residues (grease and similar) with an alkaline detergent, like FILA PS/87 or equivalent.