Plasterboarding a Double Skin Wall Ask your questions and find answers on many subjects relating to plastering and dry lining

[Malins1997]

I have a conservatory of which the walls are double skin brick. I want to plasterboard the walls and then skim the surface.

I have ruled out dot & dab adhesive due to the potential for moisture to be absorbed by the adhesive resulting in loose plasterboard. Instead I have opted for treated timber battening, with a DPC strip between the wall and batten, with a vapour check plasterboard over the top. Can anyone highlight issues with this proposal? As there is much conflicting advice online.

Additionally, if running services through the plasterboard (electrics and pipes) won't this void the vapour barrier? If so, what is the best approach to this?

[stoneyboy]

Hi malins1997,
I’m assuming your walls are 225mm solid rather than two skins with a cavity between.
Your proposal may or may not lead to damp in the plasterboard lining:
Does the wall ever become damp - are there signs of dampness eg salts on the inner surface.
Are the external wall surfaces exposed - is there sufficient features that protect the wall - roof overhang, deep window cills.
Is the floor solid and is the ground outside higher than the internal level.
If yes to any of these you should ventilate the cavity formed between the plasterboard and wall otherwise you may get condensation forming, this may be bad enough for water to run out under the bottom of the plasterboard.
Regards S