Step by step solution
To obtain a smooth flat surface, make a screed with weberfloor easy 625 or weberfloor 535 FD, a premium self-leveling compound. Wait 3 days minimum before tiling. Check the flatness of the substrate: maximum tolerance is a 3mm difference under the 2 meters ruler. The substrate must be clean and sound.
Use a deformable fast-setting adhesive to fix thin tiles:
webercol fast or webercol F1
Use a 6 mm notched trowel for 30 x 30cm and 30 x 60 cm tiles, using the back-buttering method
Use a 9 mm notched trowel for 60 x 60 cm tiles, using the back-buttering method. For bigger sizes, consult our technical department.
If webercol fast or webercol F1 has been used for tiling, wait only 3 hours before grouting the tiles.
With other tile adhesives, wait at least 24 hours before grouting the joints.
The grouting will be ideally made with weberjoint perfect or weberepoxy easy. In order to compensate for the low quantity of joints applied when tiling large tiles, joints are prefered to have a width of at least 4mm.
Use a fast setting adhesive to avoid bending/warping of thin tile edges