How do I stop cracks in large rooms?
You need to put an expansion joint to the area in question. This can be a fairly inexpensive solution but best left to the experts of plastering. Depending also on circumstance another way is to backblock the joints. This is where a 300mm by 400mm piece of plasterboard has backblocking cement applied and is stuck down from above the joint or crack. All homes ceilings should be backblocked now as a standard but many older homes weren't. Contact Syd if you need advice on this common problem.

