Plasterboard ~ a board material comprising two outer layers of
lining paper with gypsum plaster between † two edge profiles are
generally available:-
Tapered Edge † a flush seamless surface is obtained by filling the
joint with a special filling plaster, applying a joint tape over
the filling and finishing with a thin layer of joint filling plaster, the
edge of which is feathered out using a slightly damp jointing
sponge or steel trowel.
Square Edge † edges are close butted and finished with a cover
fillet or the joint is covered with a glass-fibre scrim tape before
being plastered.
Some jointing details are shown on page 644.
Dry Lining Techniques