Wall mount through plaster board

[Richard78]

Done a little searchin on here, but haven't found anthing conclusive, so please advice us of what you think.

I recently bought a 42PV500 and want to wall mount it. The desired wall is a plasterboard wall which is on the garage wall side of the living room, therefore there is a cavity between the plasterboard and the brickwork of the garage back wall of around 4-5 inches.
What i intended to do is to use some box tubing cut to the depth of the cavity so that the wall bracket will not pull through the plasterboard when it is bolted upto the wall.

Is this the right / best way of going about this, any and all help welcome from people in the know?

[Well_Jaggy]

There should be wooden joists inside the wall that the plasterboard is fixed to. You should be able to mount your bracket onto these (although it will depend on the spacing of the joists - usually 18" to 24") there are a number of methofs to detect the joists, the traditionalists rely on tapping the wall and listening to the diffirence in sound that it makes - tapping where there is no joist will sound hollow and echo slightly. tapping on the wall where there is a joist will sound dull. This takes a lot of practice, and is not really recomended for beginners. there are also a number of "joist detectors" that are available to buy in good hardware stores - the good ones will also detect electrical cable, pipes etc, and are a good investment if you plan tou do other DIY work as well - expect to pay around £50 for one of these though.

Your suggestion of "Box Tubing" - I dont really know what that is, but I assume your theory is to put something long and solid behind the plasterboard that the fixings for the wall bracket can grip? if so then that should be ok, just make sure whatever you use is solid enough and will take the weight of the bracket and TV without the fixings pulling through that as well - probably best with a good solid peice of wood!

Good luck!

[john59]

If the wall is going to be covered by the tv try using a cordless drill with a 2 or 3 mill drill bit and drill into the wall, you will notice wood on the drill bit if you hit a stud. Be thoughtfull of any cables that may be hidden though.
Good luck

[Paul_Maddocks]

Having wall mounted Pio plasma panels on plaster board onto cavity wall before. The best and most secure method was to to drop 2 large timber batons down the gap between the plasterboard and the solid way. The batons can then be fixed to the wall the screen fixed to the batons (we used coach bolts and other LARGE bolts / screw fixings)

The idea being the the timbers hold the weight on the wall and spread the weight over a larger area. Also they fill the gap rather nicely.

The worst part is that you have to cut away more of the wall to get the timbers in (however do it neatly and you will be able to get them in with minimal cutting and then fix the cutouts back to the timber afterwards, making sure you mark the centre lines of the timber before plastering in the cracks.

This sounds long winded but will give you the best fixing for your rather large and heavy plasma!

[Richard78]

The box tubing is steal tubing comes in various sizes but the sort i'm thinkin of is 1/2". I would simply drill through the wall till I hit the hard brick work, enlarge the hole and then insurt this tube then drill my fixing hole throught middle of this. Repeated as many times as necessary then mount the bracket.

Thanks for the response Paul, another approach I had not thought of.

Does anyone have any good sources for socket cover type thingies for where the cabling will pass through the wall
http://img462.imageshack.us/img462/880/dscf33538mx.jpg

[Amit_Desai]

There is a much easier way..

Find the two vertical uprights in the stud wall.. they shouldnt be more than 2' apart.

Attach a peice of 18mm mdf or ply to across the two uprights.. then fix your plasma bracket to the bit of wood.

Job done.

Amit

[Lakes_Puma]

See here for my solution

My wall mount bracket installation