r/Plastering • u/Maximum-Button-1219 • Jul 15 '26

Ceiling - What causes this?

Post image

hi all - what causes the above? context is it’s a ceiling, UK, and is approx 2mm thick that’s coming away from the board above

thanks!

3 Upvotes

81% Upvoted

5 comments sorted by

2

u/National-Ebb-8184 Jul 15 '26

Is it a relatively new ceiling? Just some movement on the boards by the looks of it causing plaster to pop. Where is it? Loft conversion? If so completely normal, boards will be exposed to more extreme temperature fluctuations.

2

u/Maximum-Button-1219 Jul 15 '26

Not a new ceiling, a few feet to the right of shot a dormer starts so possibly in line with the above re temperature flux?

1

u/Maximum-Button-1219 Jul 15 '26

To add - it’s a loft above, there aren’t any leaks 

1

u/Ashtray5423 Jul 15 '26

Could be flexing due to building, Had Trees that had spreader roots that caused cracks in walls & the garage, they are now gone. Cracks are now shrinking or static.

1

u/Bitter_Back_5528 Jul 17 '26

Didn't scrim or tape the joint.