Many older properties around Ontario still retain the old style lath and plaster ceilings and internal partitioning walls. Until the late 1950s, lath and plaster were the accepted norm in the Canadian building trade, and a messy, time consuming process it was, even for the professionals.
Then along came dry walling, or the use of plasterboard. Sheets of gypsum with a paper facing front and back were nailed or screwed to wooden studding. Once the boards had been fixed, a quick layer of finishing plaster was applied, and job was done. It seemed very simple, however, it really is not. Unless the plasterer/decorator was highly skilled in his trade, you could sometimes see the outline of the jointing tape, and the dints and dents from the fixing process. Read more from this blog: