14 Jan 2026

Introduction

Plaster cracks are not only unsightly they can signal poor workmanship or material issues. If your wall plaster is cracking, flaking, or falling off, here’s what you need to know.

1. Common Causes of Cracking Plaster

A. Incorrect Mix Ratio

Overuse of cement causes shrinkage; too little weakens bonding.

B. Dry or Dusty Surface

Plaster won’t stick well to dry or dusty bricks.

C. Rapid Drying

High heat or wind causes plaster to dry too quickly and crack.

D. No Curing

Skipping curing after plastering is a major reason for early failure.

E. Low-Quality Cement

Poor grade cement leads to weak bonding with the wall surface.

2. How to Prevent and Repair Cracking Plaster

  • Use a 1:6 mix for internal walls and 1:4 for external walls
  • Dampen the wall before plastering
  • Use fresh, high-bond PPC Cement like Sarbottam
  • Begin curing within 24 hours and continue for 7 days
  • Add fiber mesh in stress-prone areas (e.g. door/window corners)

Conclusion

Plaster cracks are preventable with the right materials and practices. Use Sarbottam Cement for smoother, stronger plastering and always follow curing and prep procedures.