I found this plaster corner crack between two external walls after removing wallpaper. I fitted an Avongard crack monitor 6 weeks ago which hasn't shown any movement until now.
The left wall in the photo has now moved inwards by 0.1mm. There's no sign of cracking on the external brickwork.
I'm assuming this isn't normal and would have cracked if it had been replastered.
Is getting a surveyor in the best option now?
- Foundation type: concrete slab
- Climate: South East England. Currently 12c/54f
- House age: 1970s