Overboard with very small boards - nightmare for future cracks?

If all boards are screwed into joist and all break bonded and scrimed Then Re plastered should be no risk of shrinkage or cracking with movement Hope this helps

As a plasterer, I wouldn’t panic just because the boards were cut into smaller pieces. Using larger sheets is definitely preferred because it reduces the number of joints, but what really matters is how the boards have been been fixed and finished. If the boards are securely screwed into the joists, all joints are properly scrim taped, and the ceiling is skimmed correctly, there’s a good chance it will be absolutely fine. Full mesh over the whole ceiling can add some reinforcement, but it won’t completely eliminate the risk of cracks if there’s movement in the original ceiling structure. Before considering taking everything down, I’d check that the fixings are solid and that all joints will be properly treated. Plenty of ceilings have been overboarded successfully without using full-size sheets throughout.

Hi there , yeah so full plaster boards 2400 x 1200 would be a lot better the fewer cuts/joins the less chances of cracking in the future,also all board joints should be staggered for a better all round job Hope this helps