I have a tiled bathroom floor which has a little flex in it and thus the grout keeps crumbling in the same area.
I don't want to rip up the floor and re-do it with a layer of thicker ply underneath, though I know that would be the propoer solution.
Is there such a thing as a highly flexible grout ?
Is it possible to make a regular grout flexible by adding something to it ?
Maybe I should just scrap out all the grout and apply something else - some sort of silicone product ? (don't laugh - jut looking for ideas)
Thanks
cf