Which fixing to use for a TV bracket?

[paperdragons]

Hello everyone,

I'm wanting to put up a 32" TV wall mount in my apartment, it's a tilting bracket type, which came with 10mm x 50mm rawlplugs and associated bolts to fix the bracket to the wall. the TV weighs around 15kg.

The problem is, the wall I want to fix it to is very thick plasterboard; the total thickness of the wall before the cavity is around 40mm, and then the cavity itself is pretty large, I'd say at least another 50mm before you get to the insulation on the outer wall - the apartment is on the corner of the apartment block. All the cavity wall fixings I can find have a maximum thickness of around half that, 24mm. The wall is too powdery and weak in my opinion for the standard rawlplugs to be sufficient. Should I go for some of those spring wall anchors and just get long enough bolts to fit all the way through, again the bolts that come in those packages seem to only fit around 24mm. Plus I don't like how thin those are compared to the 10mm bolts that came with the kit. Or does anyone know of a manufacturer of expanding bolts that would work on a 40mm cavity wall?

Thanks,
Gareth

 

[jj4091]

Can you fit battens securely to the wall with plasterboard fixings http://www.screwfix.com/c/screws-nails-fixings/plasterboard-fixings/cat840020 & then fit the bracket to the battens so that the load is spread out more

 

[paperdragons]

Can you fit battens securely to the wall with plasterboard fixings http://www.screwfix.com/c/screws-nails-fixings/plasterboard-fixings/cat840020 & then fit the bracket to the battens so that the load is spread out more

I think I'd have the same problem fixing a batten to the wall first, as no plasterboard fixing I can find will allow me to fit the thickness of the fixture (batten or bracket etc) plus the 40mm thickness of the board.

 

[foxhole]

If you have 40mm of plasterboard you can use standard wall plugs, easily enough strength, just put my 32 inch screen on single plasterboard wall using standard plasterboard plugs and very secure.

 

[Bosswhite]

40 mm of plasterboard, thats a lot of plasterboard,

Plasterboard comes in 9.5/12.5 mm thickness, sounds like the board is dab fixed to another surface. Would check that out first.
Metal Toggle Bolt Anchors are a tried and tested method of securing Medium to Heavy weight objects to cavity walls and come in different sizes/lengths

 

[JohnD]

with such a big gap, isn't the plasterboard fixed to wooden studs?

is it a party wall where they have been trying to soundproof?

 

[paperdragons]

Plasterboard comes in 9.5/12.5 mm thickness, sounds like the board is dab fixed to another surface. Would check that out first.
Metal Toggle Bolt Anchors are a tried and tested method of securing Medium to Heavy weight objects to cavity walls and come in different sizes/lengths

I originally thought that might be the case, but I thought dab fixed walls didn't have cavities? also Wherever I've drilled, the thickness has been the same on this wall.

 

[Bosswhite]

Plasterboard comes in 9.5/12.5 mm thickness, sounds like the board is dab fixed to another surface. Would check that out first.
Metal Toggle Bolt Anchors are a tried and tested method of securing Medium to Heavy weight objects to cavity walls and come in different sizes/lengths

I originally thought that might be the case, but I thought dab fixed walls didn't have cavities? also Wherever I've drilled, the thickness has been the same on this wall.

I was thinking that someone has fixed the Plasterboard to another boarding underneath, (Lathe and plaster Possibly) that could account for the 40mm thickness

 

[JohnD]

how old is the building, and is it a conversion?

 

[mattylad]

What is beyond the 40mm?

Can you drill even further into the wall itself and screw into that with very long screws?

That ought to be more secure than the unknown.