Although we do work on a lot of residential floors we also get commercial work such as the following request to deep clean Porcelain floor tiles in the high-traffic entrance area of the NHS Cancer Ward in Cottingham, near the city of Hull.
The Porcelain floor itself was quite large, measuring 170 square metres, and was in need of a thorough clean. The Porcelain tiles were Italian with a cement grey grout line, in addition, they had been laid in sections using a plastic Schluter Systems expansion joint. As you can imagine, the unit has a lot of patients walking around, along with doctors, nurses and other staff. Consequently, my contact at the NHS requested that we conduct the work at night, as this is the quietest time of day and therefore both risk and disruption are minimised.
Cleaning the Porcelain tiled floor
I started the job off with a deep clean, using a solution of Tile Doctor Pro-Clean diluted with water, the dilution was roughly thirty per cent Pro-Clean to seventy per cent water. This strength of solution was sufficient enough to lift the ingrained dirt and stains out of the Porcelain tiles. Pro-Clean is a very versatile alkaline cleaner which can be used on most types of floor including natural stone.
Working in small sections, I used a spray gun to coat the floor with this cleaning solution, before leaving this to dwell for roughly 20 to 30 minutes. The solution was then scrubbed in to the tiles using a black buffing pad attached to a 17″ scrubbing machine. The resulting cleaning residue was then promptly removed using a wet-vac machine.
Cleaning the grout
After completing the tile cleaning and inspecting the floor to ensure all dirt and stains had been removed, I paid special attention to the grey grout lines. I opted to use a solution of Tile Doctor Grout Clean Up diluted with clean water. The ratio in this instance was roughly twenty per cent Grout Clean up to eighty per cent water.
Grout Clean Up is an acid-based product designed to penetrate beneath the surface of the grout to remove grout smears and mineral deposits, including rust. It is recommended for use on masonry surfaces and acid resistant stone such as Porcelain, Ceramic, Sandstone and Slate. Once both the tiles and the grout had been individually cleaned, I gave the floor a thorough rinse with clean water to remove any trace of product. All fluids were extracted using a wet vacuum.
Deep cleaning the entire Porcelain floor took some time but the was certainly worth the effort, the tiles now look so much cleaner and the grout a consistent shade of grey.