Until recently, I didn't think there was much difference between different types of interior home walls except for the really old styles like lathe-and-plaster. We recently had some plaster work done by a very nice guy by the name of Michael Gogliormella. He explained to us the difference between drywall and blueboard:
- Drywall is meant to be (primed and) painted. After it is attached to studs, joint compound is used to smooth-out the gaps.
- Blueboard is not a final surface---a layer of plaster must be applied (and allowed to try) before it can be (primed and) painted. It is good for bathrooms because the plaster creates a waterproof seal between the interior space and the blueboard.
It's a bit annoying that there are two different names for wall construction styles. In the past, I've mainly heard the term "drywall" used for any sort of modern interior wall. But, Michael balks at that term and says he would never use it for blueboard/plaster. Is there a better term for interior walls besides "drywall"?
P.S. I've wondered what is the right term for people who install and seal driveways. Checkbook uses the term "pavers". I've also seen signs for "sealcoating".