If the coving gets too dry wet it with a hosepipe, dont be afraid to get the hosepipe on it and give it a really good soaking - that will give it a bit more flex. When ordering plastercraft , take a measure of the length you would like to put coving on add 10% and try to get a good price. Have it delivered, its easier.
Ceilings with coving look far nicer than without, that's easy to see even from the unfinished pics below
