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Fixing shelves to plasterboard over cellotex over timber studs

Discussion in 'General DIY' started by JabeSmith, 10 Apr 2021.

  1. JabeSmith

    JabeSmith

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    I have an external wall (dormer) which is plasterboard on top of 25mm cellotex over the normal timber studwork.

    I want to fasten shelf brackets to the wall. If it was an internal stud wall (without the cellotex layer) it would be easy as all I have to do is locate the studs (got a stud-finder that does that), and screw through the plasterboard into the timber. But with this wall I've also got to go through the 25mm of cellotex before getting to timber.

    Is there a certain type of fixing I should be using that puts support between the plasterboard and the timber? I know I can use CoreFix if it was a masonry wall behind the cellotex, but don't think that would work in this situation.

    Of course, with the cellotex, my stud finder (Franklin Sensors) is struggling to also find the studs, but if I find one I can find the rest as they're all 400mm apart (centre to centre).

    Any advice gratefully received.

    Jonathan
     
  2. Notch7

    Notch7

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    the joy of modern building methods

    sometimes the only way to find studs is to drill some 3mm holes until you hit one -then drill another couple of holes until you can determine the centre of the stud -then you have to hope the studs are at consistent centres to find the rest.

    celetex over studs should be ok -its got reasonable compressive strength. Maybe you need a type of shelf bracket which has a largish backplate to spread the load, like a timber one.
     
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  4. JabeSmith

    JabeSmith

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    Brilliant - thanks. I am confident in the 400mm centres as I saw it being built; I just didn't think ahead to take a measurement to the first one. I'll use a small hole to locate as you suggest.

    With the cellotex I'll therefore just make sure I've got long sturdy screws to go far enough into the timber to be tight (12mm + 25mm + 60mm, or something like that), and use brackets with wide enough profile.
     
  5. foxhole

    foxhole

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