I am gutting my bathroom and refurbing it. The ceiling was plasterboard with textured plaster. The original ceiling is lathe and plaster and a 3 x 2 frame has lowered the ceiling. My plan is to overboard with plasterboard and then pvc cladding over that. I don't know if it's normal but when I push on the frame there is movement. It does move up and down. I'm going to add more fixings to the wood that's fixed to the brick wall. Should I have 2 rows of noggins instead of the one down the middle. Would this make it more secure? Or is it normal to have some flex?