Advice on floor ply and where to buy

Discussion in 'Subfloor Preparation' started by Seanie, Nov 18, 2018.

  1. Seanie

    Seanie Member

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    hello
    We are having an extension done and the floor is raised, we insulating with 100mm celotex and having wet ufh with spreader plates.

    The final floor finish is Polyflor LVT. The builder was going to put down chipboard for the LVT to go on but I said it should be floor grade ply as a minimum. (18mm)

    My question is where can I buy this from and does it need to be flooring grade or can I use a hardwood ply from one of the builders merchants? If so what should I be looking for?

    Many thanks

    Sean
     
  2. Spacey

    Spacey Super Moderator Staff Member

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    There's only two flooring grade plywoods

    Hanson SP101 or FG1

    Your floorlayer or flooring retailer should be able to supply you with one of them

    Good luck if you go with ply from a builders merchant
     
  3. Neilydun

    Neilydun Well-Known Member

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    Probably better to go with your builder installing chipboard. It will be what he is used to.
    Then, your flooring installer can overlay 6mm ply.
    If your builder fits 18mm ply, its unlikely it will be good enough to fit a floor directly to, without additional prep anyway
     
  4. Seanie

    Seanie Member

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    The floor height can’t be any more than 24mm as we are having low floor threashold for the exterior sliding doors

    FG ply seems pricey, what is the next best option?

    Two lots of different thickness ply ?
     
  5. Spacey

    Spacey Super Moderator Staff Member

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    Sp101
     
  6. Distinctive Adam

    Distinctive Adam Well-Known Member

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    Softlay 21 would work directly over chipboard.
     
  7. Rugmunching

    Rugmunching Well-Known Member

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    May seem pricey but needs must.
     
  8. Seanie

    Seanie Member

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    What is the best way to fix this to the joists, screw down or nail?
     

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