According to the designs/drawings there is change in the material on which plaster is to be done such as brick surface, RCC surface etc.

• Avoid cracks in case of discontinuity of material (different types of material).
• Apply a neat cut through the plaster at the junction to prevent cracking of plaster caused by discontinuity of backing, changing from concrete to brick work or changing from wall to ceiling.
• Make the cut through the plaster not deeper than 6 mm while the plaster is still green (at the finishing of plaster) to keep the wall plaster separate from ceiling plaster.