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My son has just fitted my new 40" LED TV to drywall.

He did attach a board to the drywall but when he purchased the board he had assumed the metal studs were 18" apart not 24" so only bought a 20" board which wasn't wide enough to span two metal studs.

He fixed one side of the board to a metal stud (not sure which fixings he used in the metal stud but he didn't use the snap toggles I supplied) he then used two snap toggles to fix the other side of the board to drywall.

My TV bracket is a cantilever and only has about a 6" square wall plate which he fixed to the centre of the board (not sure if he used Snap Toggles).

I know Snap Toggles are supposed to be good but my concern is that if only two were used as described will this be enough to support the TV?

The TV seems to be held up really firm and the cantilever action works well but I'm just feeling nervous so I decided to research the fixing of TV's to drywall (I almost wish I hadn't!).

Can you please advise if I could be in trouble? If necessary I could not use the cantilever action as I only want to angle the TV very occasionally. I'm just dreading being told I need to get in a professional TV installer and have everything replaced. I can't bear to think of the mess it would make of the walls let alone upsetting my son after all his hard work. No mum likes to upset her son and it would be especially hard considering he is a carpenter.

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I must say that the "carpenter" son seems to be a bit of a non-professional if the description you gave of the installation is correct. Mounting a cantilever arm as described seems to me like it asking for trouble. Even with a smaller sized TV the cantilever arm, when extended, will put a rather large pull out force on the fasteners in the drywall.

To avoid any unfortunate mishap I really suggest getting that short piece of board removed. It should be replaced with a sturdy piece of 0.75 inch thick plywood that spans at least two studs and has a height of at least two feet so that fasteners into the studs can be spaced a good distance apart near the top and bottom of the plywood. Then remount the cantilever arm plate to the plywood. That should give a very reasonable and secure mount for the TV.

The plywood piece can be sanded and painted up nice before attaching it to the wall. If the color matches to the wall it would blend in well and not appear to be out of place behind the TV.

  • Thank Michael. I tend to agree with you, I think my son was managing with what was available at the time. I may be doing him and injustice and he may have used the correct screws in the metal stud but even if they are I'm still concerned with it only being held by the one stud. He was disappointed the board he had wasn't big enough to span two studs but I had already waited three months for him to do the job and I don't think he dared say he couldn't do it. I also don't think he has the knowledge of TV Brackets and their force is non existent. I will get a professional in, Many thanks. – Sheila Goswell Sep 28 '15 at 11:41
  • I don't know if I'm putting this in the right place to ask you Michael but if you see this can CAN I PLEASE ASK YOU URGENTLY DOES IT MATTER IF THE BOARD USED IS PLYWOOD OR MDF? Everywhere I read about this as to use Plywood is there a reason for NOT using MDF? – Sheila Goswell Oct 2 '15 at 13:35
  • Again not sure if you will see this Michael so I know I'm posting this information twice and I apologies for this but as you have been so king and knowledgable in answering my last question I'm hoping you can answer the following: – Sheila Goswell Oct 2 '15 at 14:20
  • Sorry to add another question but I have found a wall bracket which spans 24" studs. I know my studs are metal but could I hang this straight it the paywall using the studs with just good snaptoggles or will boarding the wall first with either Plywood or MDF strengthen this further. I can't quite get my head around why a board would add any extra strength. I am concerned that the weight of a Bracket this large may be too much. Is it better to add a lighter smaller base plate on the board or a larger bracket to allow you to spread the load? – Sheila Goswell Oct 2 '15 at 14:27
  • I would always use plywood. It is far superior in holding screws that are under tension. MDF is not much more than saw dust that us ground up with glue added and pressed into a sheet. It will not hold a screw in pull out tension nearly as well as plywood. – Michael Karas Oct 3 '15 at 12:40

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