Falling popcorn......

[Rich Riesmeyer]

The popcorn ceiling in our new house is cracked in spots. The house had been vacant for a year or so. I thought I could just chip off the loose spots and retexture. But it is almost literally falling off. The drywall wasn't primed so the only popcorn that is sticking is on the joint compound. This stuff has been painted previously and is very easy to scrape off. Should I be worried about excess moisture in the drywall? Or just prime it and re-apply? Any help is appreciated....