Hang up TV on thin plaster+plywood

[VilseE]

Hello!

We have a wall at home that is supposed to be a "reinforced TV wall," and upon closer inspection, it seems to be a thin 6 mm gypsum board with 7 mm plywood right behind it.

The previous owners used drywall anchors for their TV mount, and the question is if we should use them too? Or is it counterproductive? Is it enough with wood screws/mounting screws in the plywood for a TV that weighs 17 kg? Or should we use metal expanders since the total thickness is 13 mm (like a single gypsum board)?

With the wall mount we have (Samsung no gap wall mount, 2-part), I don't think we'll manage to hit a stud.

Here is a picture of the hole through the wall (where they put a drywall anchor) previously.

Thanks in advance!!

 

[Cheesen]

17 kg... Four of these https://www.biltema.se/bygg/fastelement/skivskruvar/gips--och-traskruv-48-x-35-mm-2000047377
Should hold even in something this thin if you don't drill too large. (Biltema's screw is phenomenal at staying in place in drywall if anyone is wondering)
Otherwise, I would have used a metal expander.

I'm a bit spoiled since we built a house... All walls are reinforced.

 

[Demmpa]

Will the TV hang flat against the wall or will it hang on an arm so that it can extend away from the wall?

 

[VilseE]

Will the TV be mounted flat against the wall or will it hang on an arm so that it can hang out a bit from the wall?

It will hang close to the wall like a picture frame. No weights outward!

 

[Demmpa]

Then the traction is directed almost vertically down next to the wall. Then "regular" wood screws are sufficient.

 

[VilseE]

Then the traction is directed almost vertically down alongside the wall. Then "ordinary" wood screws are sufficient.

Even though it's quite thin plywood? (7 mm)

 

[stugan_i_skogen]

Despite being rather thin plywood? (7 mm)

Plywood is strong as hell, I would also go with just screws if there's no arm involved in the mounting!

 

[D Singh]

Then the pulling force is directed almost vertically down alongside the wall. In that case, "regular" wood screws are sufficient.

What would you recommend if there was an arm and the TV hung out a bit?

In the same situation. Going to mount a TV on plaster + plywood.

 

[fribygg]

What would you recommend if there was an arm and the TV was hanging out a little?

I'm in the same situation. Going to hang a TV on drywall + plywood.

Are there studs?

 

[z_bumbi]

What would you recommend if there was an arm and the TV hung out a little bit.

In the same situation. Going to mount TV on drywall + plywood.

As thin as TS has or double regular sheets?

 

[D Singh]

As thin as TS has or double regular boards?

As thin as TS has or double regular boards?

Are there studs?

There are no studs. It's a concrete wall behind, a little gap, and then plywood + plasterboard. There are studs and concrete on the sides though.

Ply + plasterboard is 20mm.

 

[sinuslinus]

there are no studs. There's a concrete wall behind, a slight gap, then plywood+gypsum. There are studs and concrete on the sides though.

Ply+gypsum is 20mm.

Make a hole and attach to the concrete.