This customer from Titchmarsh near Kettering was unhappy that the Porcelain floor tiles that were installed in her kitchen six months prior were proving difficult to clean and that the grout line had turned from a grey to black and whatever she tried she just could not keep this floor clean. On inspection I soon discovered that no or very little sealer had been applied to the Porcelain which is not unusual as most Porcelain does not require a sealer however Micro Porous Porcelain does and she should have been advised by the shop that sold her the tiles that this was the case. A quote was given which she was happy with and I returned the following week to sort the problem out.
Deep Cleaning Porcelain Tile and Grout
To protect the kitchen units I covered them in a plastic and then moved onto to deep cleaning the tiles with a dilution of Tile doctor Pro Clean which was applied and left to soak in for a while before hand scrubbing the floor on my hands and knees with stiff brushes. This did made an improvement but something stronger was required to get the grout looking better so it was back down to the floor with hand brushes again but this time I used Tile Doctor Grout Clean-Up which is an acid that can remove grout smears and mineral deposits, in the end I actually used two litres of Grout Clean-Up to restore the grout to about 95% of its correct appearance and once done I gave the floor a thorough wash down to remove any trace of product.
Sealing Porcelain Tile and Grout
This grout should have been correctly sealed from day one and luckily for the client it came up to her satisfaction otherwise the only other option would have been to use a Grout Colourant which would have been more costly but cheaper than replacing the grout altogether. Had the grout been much older this may have been the best option as I suspect the result from cleaning would have been less effective. The last step was to seal the tiles and grout using Tile Doctor Ultra Seal which is a natural look sealer that provides maximum stain protection and is recommended for use in kitchens. Before leaving I gave the client written instructions on maintenance which she found very helpful.
Grout is cementious product and as a result the top layer is porous and will attract dirt so the best policy is to seal it and prevent dirt becoming ingrained there; be-aware that some sealers can darken the colour of grout so always test first.