loose dot n dab

[rjm2k]

After stripping a wall ready for painting its become clear that some pb which is dot n dabbed to a wall is loose as you can see it move when pushed. Seems to be where there is a join between 2 boards. Am wondering how to secure it. Am thinking I could drill a few holes and squirt adhesive in then patch up or maybe just some rawl plugs with screws through and maybe adhesive squirted in there too.
Any other suggestions?
Thanks

 

[Johnmelad]

Who did the work?

 

[noseall]

D&D can be fixed back with screws based on the same principal that boards can be fixed to timber/metal studs.

The people who originally fixed the boards probably used finishing plaster.

 

[rjm2k]

The house is about 30 years old so I don't think I have any comeback on who did the work. I'll use screws and plugs thanks