Plaster onto seasoned wood after SBR

[Diggory]

I’ve got some (Matt Blackboard Painted) exposed wood that’s been in a room 40+yrs.
I doubt they’ll be shrinking / moving much - quite seasoned / dry.
If I gave them a coat of SBR, could I plaster directly onto the wood ?
I could use a Jointing / filling / skim compound or Gyproc Multifinish ?

Thanks D

 

[Wayners]

Plaster don't stick to wood very well.
It's because of wood movement.
You can fix expanding metal lath over wood or two layers of chicken wire and skim over.


You can also buy 6mm plasterboard and put over the wood. No need to skim then maybe

 

[aveatry]

I’ve got some (Matt Blackboard Painted) exposed wood that’s been in a room 40+yrs.
I doubt they’ll be shrinking / moving much - quite seasoned / dry.
If I gave them a coat of SBR, could I plaster directly onto the wood ?
I could use a Jointing / filling / skim compound or Gyproc Multifinish ?

Thanks D

No as it will still move with the seasons.

 

[Diggory]

Thanks reply @Wayners and @aveatry.

I’d be working on a cosmetic ceiling beam that’s screwed through the ceiling boards to the loft joists.
If I covered that with a plasterboard skin - could I screw that to the beam itself or would that then move with the wood.

I’ve got some of that bright orange fibreglass scrim tape - could I staple that to the wood instead of a wire mesh ?
If that works, and I caulked the beam to wall / ceiling transitions; would that address the cracking risk ?

Thanks D

 

[aveatry]

Thanks reply @Wayners and @aveatry.

I’d be working on a cosmetic ceiling beam that’s screwed through the ceiling boards to the loft joists.
If I covered that with a plasterboard skin - could I screw that to the beam itself or would that then move with the wood.

I’ve got some of that bright orange fibreglass scrim tape - could I staple that to the wood instead of a wire mesh ?
If that works, and I caulked the beam to wall / ceiling transitions; would that address the cracking risk ?

Thanks D

That's a good question because in any normal build you have a wooden frame with plasterboard screwed to it then you add scrim tape to the joins and it shouldn’t move and give cracks.
But that cosmetic beam just bake sure that it in itself is rock solid before you screw plasterboard to it. But sounds like you want to cover it up so as its only faux why not take it down completely and regain a flat ceiling

 

[Diggory]

I did consider removing but I’ve got three of them.
I’d probably do a fair bit of damage to ceiling, plus I don’t know what they might be covering up.

I’m thinking about plastering so that I can (hopefully) woodgrain the applied plaster to appear more distressed / aged.

D