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) Effloresces: 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.