ᐅ Tiles of Different Heights

Hello,

In the shower area (flush with the floor, drain in the center), mosaic tiles will be installed, and regular 60x60cm (24x24 inches) tiles will be used for the rest of the floor. The mosaic tiles will be installed using only a 4 mm (0.16 inches) notched trowel, while the large tiles will be installed using a 10 mm (0.4 inches) + 4 mm (0.16 inches) notched trowel on the tiles themselves.

In my opinion, this will create a height difference (10 + 4 mm (0.4 + 0.16 inches) adhesive / 2 = about 7–10 mm (0.28–0.4 inches) adhesive for the 60x60cm (24x24 inches) tiles) and the mosaic tiles (only 4 mm (0.16 inches) adhesive on the mosaic tiles themselves). How should this be leveled? Should a trim be installed in between, or just a grout joint?

Thank you.

bruno1990 schrieb:

Mosaic tiles are being installed, and the rest of the floor will have standard 60x60 cm (24x24 inch) tiles.

Who is doing this?
Normally, mosaic tiles are installed on a slope so that they meet the level tiles somewhere. In this case, neither a rail nor a leveling compound is needed.
If the calculations still show that leveling is required, it should be done before the tiling.

Sure, the slope for the mosaic tiles is already in place; my question only concerns the height difference. In my opinion, this occurs because the tile adhesive is not applied evenly (much thinner under the mosaic tiles). I have made a sketch here:

That is why I am wondering if it would be sensible to raise the screed in the shower area (slope) already (by how many millimeters?) so that the height difference will be smaller later on.

bruno1990 schrieb:

That’s why I’m wondering whether it would make sense to raise the screed (how many millimeters?) in the shower area (slope) so that the height difference is smaller later on.

That is actually the tiler’s problem. He should know how to handle it. Ask him how he plans to do it.

This is actually quite simple. First, lay the 60cm by 60cm (24 inches by 24 inches) tiles. Then apply a leveling layer for the mosaic tiles, and once the leveling layer has set, install the mosaic tiles. Or do you want to have an edge?

Better discuss the installation plan with the tiler. With large tiles, careful planning is important.

hanghaus2023 schrieb:

It's best to discuss the installation plan with the tiler. Large tiles require careful planning.

That’s exactly right.
The screed installer can’t handle a 3mm (0.12 inch) step.
It’s the same for us, and afterwards everything is smooth, flush with the floor, and properly sloped.