I am in the process of blocking up a door way. I have made up a frame of 4x2 onto which I will fix plasterboard. Do I need to tape the joints between the plaster boards and the existing plastered wall?
i may be wrong here,my father in law is a plasterer (but he's not here to ask) i think you have to tape all the joints due to any movement etc..... so i say yes?
If you're trying to get hold of some of the right tape, it's called scrim tape. About 3-4" wide, open mesh. Not very sticky - you should probably slap a bit of plaster or bonding across the gaps then apply the tape. Smooth it off as flat as you can Leave it to dry, then skim.