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Can I skimmed on plywood?

  • 24-11-2020 8:55pm
    #1
    eamon11
    Site Banned Posts: 518 ✭✭✭


    just a small indoor section that was sectioned off with Marine ply. Will skim stick?

    Thanks


Comments

  • #2
    the_pen_turner
    Registered Users, Registered Users 2 Posts: 7,524 ✭✭✭the_pen_turner


    why not slab it first


  • #3
    eamon11
    Site Banned Posts: 518 ✭✭✭eamon11


    don't have the extra half inch to play with


  • #4
    the_pen_turner
    Registered Users, Registered Users 2 Posts: 7,524 ✭✭✭the_pen_turner


    take off the plly and put on slab


  • #5
    eamon11
    Site Banned Posts: 518 ✭✭✭eamon11


    where it is needs to be a bit stronger than slab alone. Hence the ply.


  • #6
    the_pen_turner
    Registered Users, Registered Users 2 Posts: 7,524 ✭✭✭the_pen_turner


    ply is great behind a slab. i often do it in a bathroom or kitchen

    i wouldnt reconmend skimming it . i think it will falll off. but if i was going to i would thistle bond it first


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  • #7
    ted1
    Registered Users, Registered Users 2 Posts: 23,658 ✭✭✭✭ted1


    I’d look at putting a layer of wallpaper lining on n it. Then it could be painted and wouldn’t be cold


  • #8
    BrokenArrows
    Registered Users, Registered Users 2 Posts: 7,498 ✭✭✭BrokenArrows


    Its not ideal to skim ply. It may last a good while but will eventually fall off or crack if it takes a knock.

    If you must skim it and cant put anything else on top then pva the ply, nail on some wire mesh (https://www.indiamart.com/proddetail/plastering-wire-mesh-18400400662.html) and then skim.

    Alternatively, remove the ply and replace with plasterboard.


  • #9
    the_pen_turner
    Registered Users, Registered Users 2 Posts: 7,524 ✭✭✭the_pen_turner


    BrokenArrows wrote: »
    Its not ideal to skim ply. It may last a good while but will eventually fall off or crack if it takes a knock.

    If you must skim it and cant put anything else on top then pva the ply, nail on some wire mesh (https://www.indiamart.com/proddetail/plastering-wire-mesh-18400400662.html) and then skim.

    Alternatively, remove the ply and replace with plasterboard.

    Take some layer of skim to cover expaned metal


  • #10
    Bonzo Delaney
    Registered Users, Registered Users 2 Posts: 1,577 ✭✭✭Bonzo Delaney


    4 mm tile backer board screwed to the ply then skim
    If your really tight for space id chance the thistle bond then skim.
    Other wise loads of paint


  • #11
    sbsquarepants
    Registered Users, Registered Users 2 Posts: 11,812 ✭✭✭✭sbsquarepants


    If you were to just prime and paint with something like an eggshell paint to disguise the grain a bit, would it look that much different?


    I've only ever seen it painted gloss


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  • #12
    Woodie.ie
    Registered Users Posts: 22 ✭Woodie.ie


    No you cant skim over ply and wire mesh will rust through. The proper way is to attach 10mm plasterboard then light skim or just paint the board. If you are really stuck then coat with pva bond and stick wide adhesive scrim cloth to the ply before skimming. Not ideal but it might work.


  • #13
    GreeBo
    Registered Users, Registered Users 2 Posts: 27,253 ✭✭✭✭GreeBo


    Why couldn't you skim plywood?
    Sticking won't be an issue, plywood is rough enough to allow a bond, if worried about that I would thistlebond it first.

    Only potential issue I see is if the plywood is too thin it might sag and drop off the skim, but if its 12mm then it should be fine, at least as strong as plasterboard.

    Alternatively, take off the ply, fit whatever backing you need between the studs and then board over as normal.
    What construction is the wall?


  • #14
    tenbob1
    Registered Users, Registered Users 2 Posts: 173 ✭✭tenbob1


    Yes you can skim over marine ply as long as you are using the correct skim. FBall 1200pro would be recommended, you should be able to pick up at most decent flooring stores.


  • #15
    10-10-20
    Registered Users, Registered Users 2 Posts: 7,521 ✭✭✭10-10-20


    PVA nothing.
    SBR everything.
    https://www.everbuild.co.uk/wp-content/uploads/2012/05/503-Premium-SBR-Bond-V1.1.pdf

    PVA is soluble in water and will allow delamination of the plaster if exposed to moisture.
    SBR is a water-resistant latex based primer and bonder and is the preferred option when dealing with non-ideal substrates. It will reduce the initial water-loss to the wood allowing the plaster to flow and set, preventing shrinkage away from the plywood.


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