Cracks can appear in tiles for several different reasons, but in all cases, they spoil the overall appearance of the floor. I was contacted just before Christmas by a customer in the market town of Ormskirk with a significant problem with cracking in their warm and rustic Mexican Terracotta tiles, particularly in and around doorways. The area was quite large at 85 square yards and covered multiple rooms. In general, the tiles were also in need with a deep clean and fresh seal.
After inspecting the tiles first-hand, I determined that the cracking was most likely due to the addition of an extension: the concrete floors were laid at separate intervals, causing some expansion and contraction issues. The effects are similar to shifting Tectonic plates in the Earth’s crust, if not so drastic (the tiles just tend to crack, rather than causing an earthquake!).
After agreeing on a quote for the work, I set about putting the situation right.
Repairing Cracked Mexican Terracotta Tiles
The more laborious and costly answer to the problem of damaged tiles would be to replace them with new ones, but we have found that implementing an expansion joint in the areas where the concrete floors touch each other is more effective.
We have done this before many times, using flexible adhesive and grout to fill the cracks and counteract any further movement between the different concrete floors. This repair work was carried or over two days, in order to allow time for the adhesive and then grout to set.
Cleaning Mexican Terracotta Tiles
By the third day the tile repairs were complete, so we started cleaning the whole tiled area. We usually carry out repairs before cleaning to improve the chance of the repair blending in with the existing tile.
You can see from some of the photographs above that the tiles had started to get quite grubby and were proving difficult to keep clean. To clean and remove the old sealer we applied a diluted solution of Tile Doctor Remove and Go to the tiles allowing it soak into the pores for ten minutes before scrubbing it in with a rotary machine fitted with a black pad. The floor was rinsed with water and the resultant slurry was extracted using a wet vacuum.
The next step was to give the grout lines a thorough scrub with a strong solution of Tile Doctor Pro-Clean, which is a reliable alkaline cleaner that works well on grout and tile. The dirty cleaning solution was then extracted with a wet vacuum and the whole floor rinsed with more water to remove any trace of cleaning product. The wet vacuum was then used again to get the floor as dry as possible before leaving for the day.
Sealing Mexican Terracotta Tiles
On the fourth day, we returned to seal the floor, but not before checking first with a damp meter that it had dried completely. This is essential because excess moisture can cloud the sealer and damage its performance.
Our choice of sealer was Tile Doctor Seal and Go, which provides excellent surface protection along with an aesthetically pleasing deep sheen finish.
As you can see from the photographs above, the result was fantastic. The customer was amazed by the improvement and very pleased that the difficult cracking problem had been resolved. Another satisfied customer!
Source: Terracotta Tile Cleaning & Restoration Service in Lancashire