Backing for AB Multipanel wallboard - OSB3 OK?

[ToughButterCup]

I'm framing out our wetroom at the moment. We'd like to fit AB Multipanel Wall board. We've got a fair bit of  of thinnish OSB3 ply 'spare' .

Any reason why I can't use that as backing for the wallboard? It'd be good to use it up.....

[Construction Channel]

I love the way you avoided the actual thickness of it

[MikeSharp01]

You need a solid backing.. if the board is less than 12mm I would use two layers unless the studs are a lot less than 400mm centres.

[ToughButterCup]

@MikeSharp01, you'll be able to advise in more detail on Saturday maybe? The promo videos seem a bit 'optimistic' perhaps? 

@Construction Channel, for the life of me I can't remember 9, 11, 18, 22 - I am soooo knackered 

[Jeremy Harris]

12mm OSB should be fine.  I've used a fair bit of Multipanel, both here and in our old house, and it's pretty stiff.  When doing the bathroom at the old house I had to level up a badly out of shape wall, and bonded the Multipanel directly to thin battens that were screwed to the wall and it still ended up really rigid.

[MikeSharp01]

41 minutes ago, AnonymousBosch said:

you'll be able to advise in more detail on Saturday maybe

Sounds like a plan.