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Ewi novice

Discussion in 'The Plasterers Forums FAQ's' started by johniosaif, Sep 22, 2017.

  1. johniosaif

    johniosaif Private Member

    i have a small Ewi job that i want to do, it's over ply, the only info I have so far is,the foreman thinks it's 100 mm insulation, it's about 9 linear metres and 2.1 high ,it's on a flat first floor roof , I've only done one Ewi job before on my own shed, it turned out alright , but I'd take great care on this one , what's the abc to fixing it to ply ,I take it that it needs fixing to the studs mechanically and not dabbed like I did on to the block work ,?
    Second part is the external walls of the swimming pool needs rendering,most of its block but a third of it is insulation,so block meeting insulation at two sections, no spec on it ,just to be rendered I'm advised , again I haven't ewi'd over render yet but it must be easy enough,the main concern is to do it in a way that creates one even finish that's uniform and neat , it's only about 400mm deep and 26 linear meter , just something different to do and learn in the process . Any advice appreciated
     
  2. vfr12

    vfr12 Private Member

    1- yes , screw them to the studs and to the ply as well
    2- fix battens to the edge, both sides of the block work, or mf angles and fix ply or render board. I would put tyvek over the ply before fixing the boards
     
  3. madmonk

    madmonk Private Member

    what system ya using pal
     
  4. zolco

    zolco Private Member

    Can you not put an expansion bead where the two substrate meets on the swimming pool?
     
  5. johniosaif

    johniosaif Private Member

    Probably Weber
     
  6. johniosaif

    johniosaif Private Member

    All options are open
     
  7. madmonk

    madmonk Private Member

    Is the block work flush with the insulation you could just mesh it or where it meets put a strip of mesh over first say 300mm then mesh the lot again
     
    • Like Like x 2
  8. madmonk

    madmonk Private Member

    so I take it your using weber lac?
     
    • Like Like x 1
  9. johniosaif

    johniosaif Private Member

    There's a kick about 15 mm
     
  10. johniosaif

    johniosaif Private Member

    Yes, that's the plan,
     
  11. johniosaif

    johniosaif Private Member

    Just wondering how the insulation is normally fixed to ply
     
  12. madmonk

    madmonk Private Member

    screwed on mate
     
  13. smedhead

    smedhead Active Member

    Big mushrooms:maraca:
     
    • Like Like x 1
  14. madmonk

    madmonk Private Member

    I just buy the plastic washers then screw through
     
    • Like Like x 1
  15. johniosaif

    johniosaif Private Member

    When you apply Weber thin coat over sand / cement is it the same process ,lac ,mesh, top,coat ?
     
  16. Marshy

    Marshy Private Member

    Get a rep out to spec it then you are covered. Plus post pics of milf custonerz /next doors etc
     
    • Like Like x 2
    • Agree Agree x 1
    • Funny Funny x 1
  17. madmonk

    madmonk Private Member

    I would prime it first with pr310 it shouldn't need mesh really but you can put it in for what it costs
     
    • Like Like x 1

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