Hello!
We have an issue with 12 cracked large format thin porcelain tiles (1500x1500x6mm). They all have cracked in L cuts.
The floor is made of concrete (they call it dry concrete or estrich over here). The tiles were laid 6 months after pouring the concrete in. It has underfloor heating that was commissioned slowly by no more than 2 degrees per day, but outgoing water did reach a high of 43 degrees celsius and the tiles were covered with foamy 5mm material as well as 5mm thick material that is similar to chipboard, but more like paper.
The adhesive used is Ceresit CM22 which is called (Mega Format Flexible). They made sure that all cracks in concrete are no more than 15 cm away from the grout lines. No membrane was used.
The tilers did not drill a hole in the tiles before cutting the L cut as they say it is only to avoid cracks in the cutting process. Afterwards these drilled holes get cleaned out anyway according to them. The tilers say the reason is the high maximum temperature of the floor combined with the 6mm thickness of the tiles. Would you buy that explaination?
What could be the reason here? What could we do to avoid this in the future? Should the builders or tilers be financially responsible for the damaged materials?
We have an issue with 12 cracked large format thin porcelain tiles (1500x1500x6mm). They all have cracked in L cuts.
The floor is made of concrete (they call it dry concrete or estrich over here). The tiles were laid 6 months after pouring the concrete in. It has underfloor heating that was commissioned slowly by no more than 2 degrees per day, but outgoing water did reach a high of 43 degrees celsius and the tiles were covered with foamy 5mm material as well as 5mm thick material that is similar to chipboard, but more like paper.
The adhesive used is Ceresit CM22 which is called (Mega Format Flexible). They made sure that all cracks in concrete are no more than 15 cm away from the grout lines. No membrane was used.
The tilers did not drill a hole in the tiles before cutting the L cut as they say it is only to avoid cracks in the cutting process. Afterwards these drilled holes get cleaned out anyway according to them. The tilers say the reason is the high maximum temperature of the floor combined with the 6mm thickness of the tiles. Would you buy that explaination?
What could be the reason here? What could we do to avoid this in the future? Should the builders or tilers be financially responsible for the damaged materials?
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