in the hall of my daughters (1920's) house is an area of 'blown' plaster. I have just pulled off the woodchip paper and the thin top layer of plaster came off with it - but the cement render underneath appears sound. The house has been treated for damp in the past. Should I:
a) give it a brush with PVA and re-skim it?
or b) knock off the cement render back to the brickwork and fix plasterboard with dabs and dobs?
The area is fairly small - about ft high and 3 ft wide - around a corner and door opening.
John