I have a towel rail etc to fix into a new bathroom. The room is facebrick-concrete block then plasterboard fixed with dabs of plaster. there is therefore a gap between the plasterboard and the blocks- I can't see a normal rawlplug being strong enough for the possibility of extra weight on the towel rail from the kids/adults etc.
this type of wall is new to me, what is the preferred method of fixing onto it?
A