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Plasterboarding split brick and timber walls

Discussion in 'Plastering and Rendering' started by Sam J, 25 Apr 2020.

  1. Sam J

    Sam J

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    Hi all,

    I need some advice on the best way to plasterboard the walls in my garage.

    The construction is a timber frame on a single skin brick dwarf wall.

    On the inside I want to plasterboard the walls from floor to ceiling. This means attaching the boards to the timber frame but overlapping the brick dwarf wall at the bottom.

    My question is as to whether there is any benefit to cover the brick wall with an impermeable membrane.

    My thinking is that it will provide a moisture barrier between the brick wall and the plasterboard?

    I am in two minds as to whether going to make any difference to any possible dampness or water ingress issues?

    Ta
     
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  3. martin hill

    martin hill

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    You will have to fully barrier the walls with a Moisture barrier plasterboard or a vapour barrier sheet under normal board to protect the timber frame too.
     
  4. Sam J

    Sam J

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    Hi Martin,

    Thanks for your reply - can you explain why I would need to barrier the whole wall? (I am assuming you mean both the frame and the timber frame)

    The timber frame sits on a treated cill plate and is separated from the dwarf wall with DPC.

    I am not disagreeing with your advice, I just dont understand what I gain by covering the whole wall?

    Ta
     
  5. martin hill

    martin hill

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    At the mo the timber frame in the garage is getting air to dry out any moisture. You are going to cover up the timber limiting the air getting to it. A vapour barrier costs peanuts. The vapour barrier will stop any moisture from the garage getting to the timber frame ideal if you decide to use as a mancave or have washer/dryer in there. You can put this over the framework before plasterboarding. Some may say it not needed but it a cheap thing to do now rather than later. You could also insulate with PIR board too in the framework too. All depends what you plan on doing with the garage.
     
  6. Sam J

    Sam J

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    I understand now.

    I could take the vapour barrier all the way down to the floor covering both the timber and brick walls?

    My plan was to fill the walls with acoustic rockwool type insulation. There's no plan for the garage to be anywhere other than a workshop really.

    Ta
     
  7. i’d ply it .
     
  8. Sam J

    Sam J

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    Unfortunately that's not an option for me due fire regs.

    Ta
     
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