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Housing - New Build: How to finsih internal side of solid wall with EWI - options?

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    • CommentAuthorAMG
    • CommentTimeJun 9th 2014
     
    Hi Everyone -
    MY new build comprises of EWI (160mm graphite EPS) onto solid block work (220mm). The EPS has had adhesive fix around the whole perimeter of each block and any gaps were then foam filled.

    I am wondering what the best way is to finish of the internal surface? - especially with regards becoming as airtight as economically possible? Options (if I have understood correctly) -

    1. Parge coat and then dry line
    2. Wet plaster throughout
    3. VCL to wall/ceiling then batten and screw fix plasterboard leaving a service void
    3. VCL to wall/ceilings, batten and fill void with 25mm celotex but leaving an air void for services, then plasterboard

    or dot dab plasterboard straight onto block work but ensure perimeter has continuous adhesive given that external wall has no cavity and has EWI with render - thereby hopefully stopping the wind getting through?

    Ayaz
  2.  
    wet plaster , simple , common use, cheap , airtight , long lasting , durable , nice, flat, smooth and cool when you run your hands over it

    I am not a plasterer :wink:
  3.  
    what would 200mm standard EPS give in terms of U value relative to 160mm G-EPS, seems manufacturers are charging a premium for graphite that make thicker standard eps a cheaper better u value option. IF space allows of course.
    • CommentAuthorShevek
    • CommentTimeJun 9th 2014
     
    We're in a similar situation and we're going with wet plaster, for all the reasons James mentions.

    Hopefully clay plaster. Not just because it looks so nice but to take advantage of its ability to absorb pollutants, including managing humidity by absorbing and releasing water vapour.
    • CommentAuthorDonkey
    • CommentTimeJun 18th 2014
     
    Wet plaster - where do the pipes/cables go when there is no service void?
    • CommentAuthortony
    • CommentTimeJun 18th 2014
     
    In chases or pipe boxes, wet plaster for me too inside

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