I have a wall that has been plastered (base coat and then skimmed), now in one part, there is a lot of plastic ducting (and it's back to brick, no plaster) and I am concerned if I try to plaster it, it won't stick. So the easy way is to put a piece of plasterboard over it. However how do I join and blend in the plasterboard edge to the base coat / skim coat ?
I do intend to reskim it all.
I do intend to reskim it all.