Plasterboard screwed to old wall

You can overboard if its on a timber wall,but if its a brick wall as stated its best to remove the old plasterboard and dab the new boards on.

Yes, plasterboard can be fixed directly to an old wall depending on the condition and background. If the existing wall is solid masonry/brickwork, the most common methods are either dot and dab adhesive fixing or mechanically fixing battens/metal systems where a void is required. A void is not always necessary, however it can help if: the wall is uneven, there are damp concerns, insulation/services are needed, or the substrate is unsuitable for direct fixing. If fixing directly to masonry, ensure the wall is sound and use appropriate masonry fixings. The best method depends on the condition of the existing wall and the finish required.

Do not screw to wall use dot and dab

It's not the best way to do it.i whould remove old plaster first in my opinion will last longer then dot and dab the skin

It would be best to remove the the old plaster and dot and dab new board for the best finish

No need air to flow through cavity wall boards will draw in moisture .Strap and plate with insulation plasterboard Then Scrim and coat with thistle board finish

Hi, Yes, you can fix plasterboard directly onto an old wall using dot & dab or by mechanical fixings into the brickwork, so it sits tight against the wall. You do not need a void behind the board in most cases. In fact, bonding it tight is often better for solid masonry walls. A void is only really needed if you are running services behind the board (electrics/plumbing) or need insulation/air gap. Make sure the wall is sound, clean, and use the correct adhesive/fixings for a solid finish. Kind regards, Mohammad

No you can't do this it's a rubbish job

For an old house, the best practise is to remove the plaster, strap the wall so there's a gap, then install the plasterboard. Dot & dab in an old house can cause condensation and pull damp through.