Old cut-out piece of plasterboard screwed back in - how best to patch up?

joe90mitch

The panels well above head height, it's between the old kitchen room and the new extension at the height of the RSJ. No one will ever knock it.

I've got some offcuts of pine, about 2cm thick - would that do as a batten for the sides?

Will wrap my head around all the differing advice and take this on tomorrow

FreeBear

joe90mitch said: Will wrap my head around all the differing advice and take this on tomorrow

20mm pine will be OK - Ideally, you want something that is at least 50mm wide so that you can keep screws 12mm+ away from the edge of the plasterboard.

No real difference of opinions on how to do the job. Just preferences for adhesive

joe90mitch

They're far wider than that so should be fine. I can cut down to a manageable size and bear in mind what you said re 50mm, thanks. 

Jeepers_Creepers

If you happen to have timber battens available, Joe, then it's a good idea to fit them so's they support the panel around its perimeter as much as possible - that's the ideal scenario.

Which adhesive you use will likely also come down to what you have available. I usually swear by Stixall for most jobs, but would choose good ol' PVA for this job for a few reasons - it won't 'gap-fill' too much, so if you use it between the timber battens and the back of the p'board, it won't push that panel out further than the rest of the wall - something you really want to avoid. However, you will find that the adherence between the p'board and the timber using PVA will be absolute - you will not separate them afterwards - you'll destroy the P'board in any attempt :-)  

It's also wipeable - any excess can be removed very easy, it being water-based. And finally, it'll adhere better to the chalky surfaces of the bare plaster edges than any other adhesive - again being water-based.

If you don't have PVA - if you have something else - then go for the 'something else' as long as you know it'll do the job. It's good that it's out of traffic areas - almost certainly any repair you do will be absolutely fine. :-)   

Grenage

joe90mitch said:

Will wrap my head around all the differing advice and take this on tomorrow

Don't worry too much; it's a simple job and whatever you do will likely be fine.

Jeepers_Creepers

I've just thought of another way to fix it...