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11 CM gap to wall, mounting heavy object

  • 25-07-2016 10:47am
    #1
    quozl
    Registered Users, Registered Users 2 Posts: 3,308 ✭✭✭


    Heya all,

    I'm looking for advise on an awkward TV wall-mounting setup.

    I want to wall-mount a tv on one of those articulated arm wall-mounts - it will be on the end of a long lever making the force pulling it out of the wall a lot stronger.

    The wall is plasterboard with a huge hollow space behind it. It is 11CM from the surface of the plasterboard back to the wall behind it. The wall is the external wall of a basic extension done to the house by the previous owner. So I guess that what I'm reaching 11CM in is concrete blocks, but I don't know.

    I can source 16 cm long frame fixings. Which would mean that there would be about 5cm of frame fixing in whatever the external wall is made of (might be not very thickly walled concrete block...), and 11 cm of frame fixing bolt in freespace, adding even more to the lever effect. The TV mount is only 2 bolt, so that makes me nervous. The TV is about 36", not the heaviest but not the lightest either.

    A friend of mine suggested cutting a hole in the plasterboard and cutting a matching block of wood; screwing that to the external wall and then the tv mount to that. That would be a giant pain for me as I'm new to this sort of thing.

    The TV mount very clearly says not to fix it only to plasterboard.

    Any suggestions on what I should do?

    [edit] I should have said, I can't find any stud in the area using a stud-detector. Surely there must be one every 16" or so, but I can't find one. Can find them in most other walls in the main part of house, but almost every wall in the house seems to be differently constructed [/edit]
    thanks!


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