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    Sub floor on top of 12.5 ok

    Flooring Specialists architect recommended a 22 mm subfloor on top of joists 600....the joiner put a 12.5 instead on top and said that will do.A real wood floor has to go on top.The sbmub floor squeaks. Is this ok?

    Asked by Anne on 1st Aug 2022
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    Best Answer

    Ashby Flooring

    "Not recommended. You architect is correct.
    Best contact the finished flooring suppliers.
    Or the company fitting it."

    Answered on 1st Aug 2022 - Member since Jul 2022 - report
    Prestige Property Services

    12.5 mm seem to be extremely thin for a sub floor
    I’d of thought the minimum would need to be 18mm with a glued joint"

    Answered on 1st Aug 2022 - Member since Jan 2020 - report
    m barnard

    "22mm would be better but you can get away with 12.5 as long as you are putting down at least a 18mm floor over the top and that would have to be fix through the 12.5 and go into the joists"

    Answered on 1st Aug 2022 - Member since Jan 2019 - report

    "If the architect recommended 22mm it must be 22mm and there is no conversation. The 60cm construction is for minimum 22mm boards. I don't understand why they were founded 12.5. In my opinion, a long layer must be applied crosswise so that the floor has sufficient resistance to sagging. Of course, it should be glued to the first layer. As for my eye, "saving". In this case, the joiner is not right. Kind regards,"

    Answered on 1st Aug 2022 - Member since Jan 2019 - report

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