Question regarding internal wall

[Shaun90]

I'm trying to mount a TV on an internal wall. I couldn't find any studs behind the wall. I used a strong magnet to find the screws, couldn't find any.
I opened up one of the socket covers the the wall, I removed the internal screws too, it looks like a wall plug.
Could it be a brick wall? It's a new build house completed in 2022. Was expecting all the internal walls to be stud walls.

Thanks for any advice.

 

[freddiemercurystwin]

Pull the box out? If you tap the wall does it sound hollow or solid? Cut a hole in the plasterboard behind where the TV will go? Speak to the neighbours? It would be unusual for it not to be a stud wall.

 

[Shaun90]

Yeah just managed to pull the box out. It looks like concrete block to me.
The wall is 2.8m long. Some area does sound hollow when I tap on it, some sections sound rock solid.
It's a wall next to the stairs.

 

[freddiemercurystwin]

Is there a small cavity behind the plasterboard? If so it's probably plasterboard on dot & dab on blockwork, which would explain why some sounds solid and some hollow.

 

[Shaun90]

Yeah thanks for helping.
It is dot and dab, got some corefix to get the bracket on the wall.
Just surprised that an internal wall has block work.

 

[martygturner]

which way do the floor joists run...

 

[freddiemercurystwin]

Yes it will be structural taking the floors above etc.