Yes you can overboard using 9.5mm plasterboard, the reason I say 9.5mm is that if the ceiling has any undulations 9.5mm will follow these easier than 12.5mm board but this is up to you, also use 50mm driwall screws to fix the new board then scrim the joints and plaster, remember to stagger the joints it is important,,
Beside this, can you put plasterboard over plaster walls?
The short answer is that insulated plasterboards can be bonded over existing plaster using acrylic sealant adhesive or low expanding PU foam adhesive so long as the plaster is sound, solid and dry. However there are a few more issues that need to be considered before you start.
Furthermore, can I plasterboard over an existing ceiling? It is possible to fix plasterboard over an existing ceiling, but you’ll need to determine where the joists are first. Downstairs you’ll have to prod the ceiling with an awl or lift the floorboards in the room above. Mark the joist gaps on the wall with chalk and you’re ready to go.
Similarly, it is asked, can you dot and dab plasterboard to plasterboard?
Dot and dab right over it using bonding compound/ drywall adhesive (whatever its called where you are!) You wont need much adhesive between the boards so you wont lose hardly any room, and it sticks like **** to a blanket Hth.
Do you need to plaster on top of plasterboard?
A. Many new homes these days are not plastered internally. The stud partition walls, and often the inner faces of the outside walls too, are lined with plasterboard, but this is not skimmed with plaster. The paper surface of the plasterboard is the only finish, and paint or wallpaper is applied directly to it.