I have bought what must have been an Artexer’s house ! Artex everywhere. I am putting up new ceilings and insulated plaster board on external walls. I cant get a plaster’a to do the internal dividing walls so have decided to plaster board over them as well. I will tape and fill the joints etc as have done so in the past. My question is what is the best way to fix the plaster board to the walls. I don’t want to dot & dab as it takes up valuable room and will involve removing architrave and widening door linings etc. Im thinking of using 9.5 mm and glueing it to the existing surface which i will stabilise with pva. Is it ok to use 9.5 ? There will be very little gap. If any. Thanks