Question about mounting TV

[Doddsy]

Hi, I'm looking for a bit of help. I have a 40 inch LCD which I'm looking to wall mount. Only problem is the wall it's going to be on. It's like two sheets of plasterboard with a sort of honeycomb between it (I don't have a clue what it's called). I'm just wondering how I'd go about mounting my TV on it? A friend has suggested putting a plate on the wall behind it that'll take all the stress as anchor bolts won't hold. Or would something like these be sufficient?
http://www.screwfix.com/prods/11143/...x-72mm-16-32mm

Thanks for any help in advance.

[cunny678]

Originally Posted by Doddsy

Hi, I'm looking for a bit of help. I have a 40 inch LCD which I'm looking to wall mount. Only problem is the wall it's going to be on. It's like two sheets of plasterboard with a sort of honeycomb between it (I don't have a clue what it's called). I'm just wondering how I'd go about mounting my TV on it? A friend has suggested putting a plate on the wall behind it that'll take all the stress as anchor bolts won't hold. Or would something like these be sufficient?
http://www.screwfix.com/prods/11143/...x-72mm-16-32mm

Thanks for any help in advance.

When you say honeycomb - do you mean it has a wooden internal stud frame and the space in bewteen the frame is filled with cardboad or metal noneycombs?

Chris

[Doddsy]

I don't think it is a stud wall at all, as far as I can tell the whole wall is just filled with cardboard honeycombs. We had a similar one in our bathroom, when we got the shower redone we had to have a joiner rip the wall out and redo it as a stud wall.

[27neth]

Hi,
It is just cardboard inside. There is timber in there at around 4 foot centres. The walls come in sheets 8x4 with timber frames around the edges. The timber is only around 1 inch wide......

john.

[curvature]

Originally Posted by Doddsy

Hi, I'm looking for a bit of help. I have a 40 inch LCD which I'm looking to wall mount. Only problem is the wall it's going to be on. It's like two sheets of plasterboard with a sort of honeycomb between it (I don't have a clue what it's called). I'm just wondering how I'd go about mounting my TV on it? A friend has suggested putting a plate on the wall behind it that'll take all the stress as anchor bolts won't hold. Or would something like these be sufficient?
http://www.screwfix.com/prods/11143/...x-72mm-16-32mm

Thanks for any help in advance.

I would guess your house was built in the early 70's?? This was fairly common material but i can't recall the actual name for it.

As i have said before i have hung radiators onto plasterboard using the fixings you show. The rads being a lot heavier than you tv.

My only concern is that you say the timber stud is at 4ft centres? Good practice is 2ft or 600mm. If you exert to much of a load on the fixings you may just pull a section of the board away.

I would be inclinded to cut out and build back up at reduced centres. You can then also hide you cabling.

[27neth]

If i remember rightly its called paramount wall. To cut a section out is a bit of a nightmare, as the cardboard inside is stuck to the plasterboard.
You would have to cut a large section out (4 foot wide)and fit noggings across. The internal size for the timber is around 35mm wide to fit inbetween the plasterboards.

john.

[cunny678]

Originally Posted by Doddsy

I don't think it is a stud wall at all, as far as I can tell the whole wall is just filled with cardboard honeycombs. We had a similar one in our bathroom, when we got the shower redone we had to have a joiner rip the wall out and redo it as a stud wall.

Looks like you have a dilema! In my experience the problem you have with using the bolts you mention is that fixing into plasterboard are generally ok if the weight is pulling down vertically and not pulling out. In my opinion, the problem you have is that a 40 inch LCD must weigh a fair bit and most wall brackets place the front of the tv over 6 inches from the wall, so there is a force pulling the anchor forward. Again, it is my opinion that you are only relying on a small amount of area on the back of the bolt to stop it being pulled through. Also, I have put up quite a bit of plasterboard recently and can tell you its quite common for there to be small pockets in the board where there is no cement/plaster

It would only take one of your fixings to go through or close to one of these to reduce the effectiveness of the fixing. Its up to you but I would not risk using those fixings with a £1000 TV....................

Whats on the other side of the wall?

Chris

[Doddsy]

Part of the other side of the wall is a cupboard, which is why I'm considering the plate idea. My mate that suggested the stress plate is a joiner but I wasn't really sure what he meant. I've had a (very unprofessional) knock around the wall and can't hear where the timber is.

[ravenrider]

Unfortunatly my current house has these internal walls (if you can call them that), you do not mention the size of the wall or if it has a doorway in it, personally if it has no doorway i would build a studwall in front of it, vertical lengths at 400mm centres, horizontal noggings at 900mm intervals (basically so you dont muck up 2 rooms by taking it down) and cover it in 18mm ply then screw some plasterboard on top and plaster it, this would also give you the opportunity to hide cables and place supports for any shelving you may need. You can do it if theres a doorway in it , its just a bit more comlpicated.

Just a thought.

[Doddsy]

I would do something like that but we just literally had the room plastered and it's just been decorated (over the last 2 days in fact). Can't really warrant having to get a plasterer in and redecorating again (my girlfriend would kill me as she's done most of the painting).

[27neth]

The fixings you have chosen will work fine as long as the tv is tight against the wall. If you use those fixings you can buy a fixing tool to use with them. A lot of times when you use that type of fixing they get no grip and spin in the plasterboard when you use them. The fixing tool compresses them in place, i would recommend buying one. They are not expensive and work very well.
You will never find the timber in the wall by tapping it, use a small nail (40mm) and keep knocking it into the wall untill you find the timber.
The stress plate if you want to use that would be a piece of 18mm plywood, the larger the better to spread the weight on the back wall. If its not seen it would be a easy solution.

John.

[cunny678]

Originally Posted by Doddsy

Part of the other side of the wall is a cupboard, which is why I'm considering the plate idea. My mate that suggested the stress plate is a joiner but I wasn't really sure what he meant. I've had a (very unprofessional) knock around the wall and can't hear where the timber is.

If you can use a nail or a small screwdriver to locate the wood behind the plasterboard as 27neth suggests you could screw into the wood with some fixings and use the screwfix fixings for the remainder! At least you would have some fixings into wood which would take most of the weight!

If you dont already have a mount I used one of these as it allows fixing very close to wall and it was very good quality http://cgi.ebay.co.uk/Wall-Bracket-M...QQcmdZViewItem

Personally, i wouldnt risk the bolts on their own...............


Chris

Chris