First of all, we need to understand the factors impacting tile deformation:
1. One is screed floor and semi-wetting mortar layer under tile;
2. The second is the bonding layer; the third is the ceramic tile itself, while shrinkage of tile is the smallest because of high temperature forging, we do not have to worry about its deformation. Secondly, the shrinkage rate of the screed floor and semi-wetting mortar layer is low.
3. The biggest contraction is the bonding layer, especially when traditional paving usually used with cement paste, like our common cement road surface which is easy to crack.
There are two solutions to avoid problems caused by heat-expansion and cold-contraction:
1. To use the recommended adhesive and grout
2. Reserve 1-2cm gap for expansion when floor paving so as to keep cooling space.