How to find the studs behind plasterboard wall?

Akrasia

Magnets will literally stick to the nails so you can make a little map on the wall with some strong magnets

OneEightSeven

Nowadays, chippies will use screws to erect plasterboards because nails move, leaving nail pops in the plaster running up and down the studding. I used these nail pops to mount my TV and mirror.

The Continental Op

https://www.boards.ie/discussion/comment/120016258#Comment_120016258

Its not uncommon to have no studs. I've been on site and seen that insulated plasterboard installed and I've never seen it go on to studs just "glued" straight on the wall.

The Continental Op

This is another method a modern way of my cutting bits of pipe as spacers.

https://www.youtube.com/watch?v=7DGGUbbbBZI

The spacers he uses are available in screwfix https://www.screwfix.ie/search?search=space+plugs

remoteboy

https://www.boards.ie/discussion/comment/120016320#Comment_120016320

Yep. That’s my situation alright.

The Continental Op

https://www.boards.ie/discussion/comment/120016349#Comment_120016349

Then either you fix to the plasterboard or you fix through the plasterboard.

The issue with fixing through the plasterboard is that you don't want the poorly supported length of screw that goes through the plasterboard, the insulation and then the void space to sag and you don't want to tighten any fixing and crush the plasterboard.

The answer if the coreplugs are too short is the spacers either the plastic ones in the video or your own cut out of tubing.

C. Eastwood

https://www.boards.ie/discussion/comment/118929694#Comment_118929694

In the 60’s and 70’s - 56 “ slabs were installed with studs and ceiling joists at 14” c/cs.

Aldo to save the cost in roof trussed rafters, some roofs were constructed with the truss rafters at 18” c/cs,

The Continental Op

These turned up as a suggested buy on my Amazon home page, designed for hanging stuff on external insulation but might be of use internally. The load information if you go to the Fisher website is around 50-100kg (0.5 -1kN) in brick or concrete which is probably a pull out force rather than a vertical loading, but I'd have no worries with a 30kg flat screen mounted flat on the wall with 4 of them. Not so sure of any fixings with some of the mad adjustable mounts that massively increase the load (leverage) when the screen is tipped and turned away from the wall. There isn't any support for the bolt but they are meaty enough and when correctly installed the depth of the fixing is fixed so you can crush the insulation or plasterboard.

https://www.amazon.co.uk/Fischer-45682-Thermax-Stand-Off-Installation/dp/B001L5SLKE/

The listing says 2 Piece but the questions indicate you get a box of 20.

remoteboy

Well for better or worse she’s up on the wall. I used the spaceplugs in the end. Thanks everyone for the help and advice. Hope you all have a great Christmas.