It might loosen them and might rot the floor.
Gap between floor and wall tiles.
The large format 18 inch tiles should have inch space in between.
These can be left in place and will not be seen when you have completed your tiling.
There is a gap of say 5mm to 8mm give or take high between where the floor tiles meet the wall tiles in the bathroom.
The d i y video how to seal a big gap between tile floor and tile wall in a bathroom or shower.
As the tiles increase in size a larger gap becomes acceptable.
Fill gaps larger than 1 8 inch.
Gently spread the tiles and place two spacers between them one at the top edge of the seam and one at the bottom edge.
Gently push the tiles together so the spacers are tight in the joint.
Instead fill it with an elastic material capable of sustaining the movement of the floor and the movement of the wall.
The tile council of north america recommends at least a quarter inch gap between the tile floor and the walls.
Gap between floor tiles and wall tiles.
I m guessing its the thickness of the dot and dab then plaster board then tile adhesive then tile.
For smaller tiles is advisable to use small spacers.
Never fill this gap with grout because tile grout is not flexible.
Caulking is the best choice for this application.
It shows how to seal a gap in the corner where the tile floor.
If your gap is smaller than 1 8 inch in width use regular caulk.
To read the rest of the thread look here.
The gap goes 3 5cm to 4cm back to the breeze block.