Just been to a job that just needs skimming out all the walls and ceilings have been boarded out with 100 mm boards all wall boards have been screwed to batons with normal drywall And the same with the ceilings with the odd board hasn't meet tight they have ramed rockwool in the my question is would all the joints crack and would normal drywall be ok because of if you bang into it would it withstand without any cracks