Preparing the bathroom floor for laying tiles.
Our basement bathroom subfloor (cement covered by membrane with Dricore tiles) is too bouncy to lay down our porcelaine tiles even with the 1/2" plywood on top. The dricore subfloor should have been nailed into the cement but because it had been covered with a membrane we did not know where the pipes were and were afraid they would get punctured. The contractor thought the plywood would be stable enough but the floor moves too much. Now what can we do? We have already bought the tiles so we can't change to vinyl. Should we remove the plywood and dricore and put the tiles right on the membrane? But the floor is probably not level enough. and would it be too cold or humid with no air circulation. Please help us solve this problem. We can't install any of the bathroom (shower, vanity, sink, toilet) without the floor being done.