Thin and skimmable

[Pocster]

I’ve messed up a bit 🙄

Some internal below ground light well windows are too tight to the wall when open . Wall return is 9.5mm plasterboard . My BM won’t ( can’t ! ) get thinner plasterboard . Is there any other product I can use ( 5mm or less thickness ) that a plasterer can still skim without issue ?

[Russell griffiths]

Why plaster it ?

6mm mdf ?

6mm mdf with veneer ?

those shower panel things. 

What sort of finish do you want ?

[Redbeard]

Along same lines as @Russell griffiths, I got some fibre cement boards as verge undercloaks. I just put the leftover one in a 'safe place' yesterday, and cannot find it to measure, but I think they were 3-4mm. Thinnest tile-backer I have seen is 6mm.

[Pocster]

1 hour ago, Russell griffiths said:

Why plaster it ?

6mm mdf ?

6mm mdf with veneer ?

those shower panel things. 

What sort of finish do you want ?

Rest is all plasterboard . So really just want to change the 1 piece ( per window ) - otherwise more work 

[Pocster]

Can a plasterer skim tile backer board ? . You can get that in 5mm …. 🤔

[markc]

Yes you can skim backer board, what’s behind the board? Unless it’s a void then good old browning and then skim

[Pocster]

21 minutes ago, markc said:

Yes you can skim backer board, what’s behind the board? Unless it’s a void then good old browning and then skim

Timber . I’ll glue the board to it to avoid the fittings . Assuming that means he can skim it even thinner .

[markc]

2 hours ago, pocster said:

Timber . I’ll glue the board to it to avoid the fittings . Assuming that means he can skim it even thinner .

If it’s timber then the backer board is the best plan