The downward curve in the beams prevents this. They are about 100mm lower in the middle than at the walls - so no room for straight board - plus it would look daft!
Hi - first of all thanks for all the helpful info this forum provides. First time I have asked a question but have come here lots of times.
So I am plasterboarding in between the oak beams of an old cottage. The beams bend (a lot!) and so the plasterboard needs to follow the curve of the...