Mount TV on Insulated Plasterboard on Brick Chimney Breast

[oioi727]

Hi all, I have read any posts about stud walls with plasterboards, but my situation is slightly different, let me explain.

I would like to mount my plasma on the chimney breast which has got 48mm insulated plasterboard against the brick wall.

The plasterboards we attached using dot and dab, I did tell the plasters to cover the entire area with adhesive where the TV is going to mounted. I am unable to confirm this was actually done...they were not the best...

I estimate after the plasterboard, skimming and paper call it 50mm plus lets say a gap of 2cm between the insulated plasterboard and wall, in case they never packed it out with adhesive.

The plasma TV I got is a 50" LG which weights 34kg.

I am using a standard bracket which does not have swivel but has tilt.

Can anyone please let me know:

if it is safe to mount the TV on the wall given the above information.

What length/type of screws I should use.

Do I need to use washers?

Thanks in advance.

 

[Sam Gangee]

I confess my ignorance but I think this describes what you have: http://www.satcure.co.uk/accs/dryline.htm

You can get brown foam injection kits that squirts foam into gaps. It sets fairly hard and will increase support, if required.

 

[oioi727]

Hi Sam,

Thanks for reply. I will look into both items.

Have you had any experience in using the dry line bolt kit?

I already got some very long screws and very long plugs, was wondering if i could use them or are these simply better quality in terms of materail and design.

Thanks

:-p

 

[sparky2488]

We come across dot and dab all the time in offices when hanging digital signage, The main issue you'll face is as you tighten which ever fixing you decide in there's a risk the plasterboard will flex inwards to a point you'll see slight raised sections or even worse case the plasterboard could snap inwards . . . if your lucky it'll be hidden behind the screen, but always the chance it could be seen. If were doing this in offices we always remove a section of the boarding and mount CLS or similar wooden batten directly to the wall and then coach screw the rear frame onto the wooden batten, this ensures no flexing in the board work . . . another alternative is to drill out the plasterboard and create some packing spacers that sit flush to the wall and stand slightly proud of the boarding, this again will stop it flexing.

Don't go over the top with fixings, but if your tilting the screen have a few more in the top row than the bottom as this will be put under more stress than the bottom as the screen will try and pull away slightly dependent on the level of tilt

 

[oioi727]

Hi Sparky,

Thanks for the advise. I already had a plasterboard snap slightly on me when putting up a fancy pancy designer rad, I understand completely about being very careful.

Unfortunately, the room has been fully decorated and the chimney breast has been wallpapered.

I'm going to order a Dryline Bolt Kit as per Sam's link and will get the longer 1200mm screws.

Will let you know how I get on.

:-p

 

[sparky2488]

No worries, good luck fitting it

If you do find the boards starting to flex though you can always use a few of the large plastic spacers that normally come in the mount packaging to act as a bracer between the brick and the back of the mount.

 

[ilikewatchingtv]

Hi, I posted some time ago about the method I had used to mount a TV on a chimney breast which had been dotted and dabbed:

//www.diynot.com/forums/viewtopic.php?t=250025

I must add that the installation has now been up some time and I wouldn't hesitate to use this method again, or recommend it to others!

Untitled

• ilikewatchingtv
• 5 Jul 2011
• 2

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[Sam Gangee]

I think that drilling a 12mm diameter hole 100mm deep ain't for the faint-hearted! What sort of material is it - brick or breeze block or...?
Did you drill a pilot hole? What sort of drill and drill bit did you use? (I think my own little B&D drill would struggle to get a 1/2" drill that deep into brick.)

Have you had any experience in using the dry line bolt kit?

Nope. Caveat emptor.

 

[oioi727]

Hi Sam, G

I will be going into a brickwall and will be using a masonry drill bit when I get round to it.

 

[Monkeh]

I think that drilling a 12mm diameter hole 100mm deep ain't for the faint-hearted! What sort of material is it - brick or breeze block or...?
Did you drill a pilot hole? What sort of drill and drill bit did you use? (I think my own little B&D drill would struggle to get a 1/2" drill that deep into brick.)

That's what an SDS is for. They're cheap to hire.

 

[oioi727]

After spending a lot of time thinking about what to do, I finally decided to use 12 X 100mm screws with plugs and washers.

The bracket is rock solid and the tv looks great.