Plastering & Rendering

Plasterboard attachment to External Wall

Anonymous user 23/02/2024 - 3.38 PM

Hi, I am in planning for wall mounting a TV and it will be using an external wall. Decided to do a little discovery about how the plasterboard is attached to the external wall so I can plan fixings, hiding cables in wall etc. Simple taping indicated hollow space so I assumed there must be battens. Using a cheap stud finder that I have used successfully before for locating studs on other walls I soon found that I couldn't find any vertical consistency for where it thought it had found a stud. This made me question whether there are floor to ceiling battens. I decided to drill a hole to investigate further. I drilled into a hollow sounding piece of the wall and found after 15mm (depth of board) there was a void of about 10mm and then what I think was breeze block (drilled into easily with standard drill). Does this sound normal?, I was expecting either the plasterboard to be attached directly to the breeze block or to floor to ceiling battens and would have thought that these would be much greater than 10mm. The house I live in is about 12 years ago old, the builder was an independent that has subsequently gone out of business and we have found many internal issues for other things. Any help would be appreciated as I don't want to make further holes to investigate further if I can help it. Thanks in advance. UPDATE: cannot find how to reply, but here is an update: borrowed a neighbours inspection camera and there looks to be a nice consistent 10mm void with what looks like rectangular blocks of foam at intervals that are maintaining the 10mm void space between plasterboard and block. As the space is tight I cannot get the camera in too far to span the whole wall but looks consistent as far as I am able to see. Think I will just get long fixings to go into the block to hold my TV brackets and try to rod cables within the 10mm gap. Does this seem like the best approach. Thanks