Details below of a Terracotta tiled floor at a house in Leighton Buzzard which was in need of a deep clean and re-seal.
Cleaning Terracotta Floor Tiles
To get the tiles clean we applied a strong dilution of Tile Doctor Pro-Clean mixed 50/50 with NanoTech Ultra Clean which combines into a heavy duty alkaline cleaner containing nano sized abrasive particles that cleans deep into the tile. For best results let the cleaning solution dwell on the surface of the tile for 10-20 minutes before working it into the tiles with a rotary machine fitted with a black scrubbing pad. The soiled solution was then removed from the floor using a wet and dry vacuum and the stubborn areas treated with a steamer, following that the whole floor was washed down to remove any remaining chemical before sealing.
Terracotta Tile Sealing
We returned when the floor was dry to seal using seven coats of Tile Doctor Seal and Go (Terracotta is very porous) which works well on Terracotta adding a nice shine to the tile as well as providing on-going stain protection.
Source: Terracotta Floor Tile Cleaning