Well, I think when they fall off, I’ll put it on a solution. Still have not fallen off. And here, about three years ago, from the ceiling to the bathroom, three rows of tiles moved away, I had to remove them. All the time did not reach the new plant on the solution. And then one evening a neighbor called from the bottom, and said that the ceiling was damp, and in some places drops were hanging.
Something had to be done quickly. And here foam came to the rescue. I put it in the gun, and for the cause. The old cement cement, where it remained, did not begin to be removed. Where there was no cement, I applied more foam there, and where there was less cement. I glued all three rows of tiles, removed the foam between the seams, went through the grouts (found under the bathroom, probably from the first repair).
The first days he was afraid that he would fall off from dampness, steam. Now the fear has disappeared, now three years have passed, and the tile has not moved anywhere, does not move.
I don’t know how much longer it will stand. Now I and other products stick to the foam, where possible, holds better glue. Maybe someone wants to spoil my article before doing this, you have to try it yourself, and only then write a refutation !!!