Development of one or more localized swellings on the prepared surface of the plaster.
The development of one or more cracks that cannot be assigned for structural reasons.
Development of a series of hair cracks on the surface of the finished plaster. Known as ‘map craze’, when it creates a random pattern on the surface of the affected wall.
The deposition of soluble salts on the surface of plaster or background.
Scaling away of a patch of plaster surface due to lack or loss of adhesion with the previous coat.
The presence on the plaster surface of the pattern of joints or uniform breaks in the continuity of the surface characteristics of the background.
Removal of substantial areas of plaster work from the background.
popping or blowing
The presence on the plaster surface of a conical hollow (pop or blow) in the backing and/or finishing coat.