Following are the defects in plastering:
1) Blistering of plastered surface: it is the defect in which small patches of plaster are swelled out from the plastered surface.
2) Crazing: it is the defect in which a series of hair cracks on plastered surface are formed due
to improper proportion of ingredients.
3) Cracking: it is the defect in which cracks are developed because of following reason-
a) Improper preparation of surface to be plastered.
b) Structure defects
c) Lack of curing
d) Faulty workmanship
4) Efflorescence: it is the defect in which the whitish crystalline substances appears on the
surface due to presence of salt in plaster materials and bricks.
5) Popping: it is the defect in which conical holes are formed in the plastered surface due to presence of some particles which expand on setting.
6) Flaking: it is the defect in which very loose mass of plastered surface is formed due to poor adhesion between successive coats.
7) Rust strains: it is the defect in which rust strains are formed on the plastered surface done on metal laths.
8) Uneven surface: it is the defect caused by poor workmanship.
9) Peeling: it is the defect in which there is complete dislocation of some portion of plastered surface which forms the patches.
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