Plaster work involves applying a protective and decorative coating of a mortar mix—typically cement, sand, and water—to walls and ceilings to create a smooth, even surface. The process includes surface preparation, such as cleaning and moistening, followed by applying coats of plaster. It then requires smoothing and finishing to achieve the desired texture and appearance. Finally, the plaster is cured for durability and inspected for imperfections.
Purpose of Plaster Work
- Aesthetics: Creates a smooth, even surface for interior and exterior walls and ceilings, improving the building’s appearance.
- Protection: Acts as a damp-proof coat, protects walls from atmospheric agents like rain and sun, and increases durability.
- Conceals defects: Hides imperfections in masonry work, such as unevenness and inferior or porous materials.
- Fire resistance: Provides fire-resistant properties to surfaces.
- Sound absorption: Can absorb sound, contributing to improved acoustics.
- Base for finishes: Provides a satisfactory base for painting, whitewashing, or other decorative treatments.
The Plastering Process
- 1. Surface Preparation:The surface is cleaned to remove dust, dirt, and loose particles, and then moistened to improve adhesion.
- 2. Mortar Mixing:Plaster (mortar) is mixed to the desired consistency using the correct ratio of cement, sand, and water.
- 3. First Coat Application:The first coat, or “scratch coat,” is applied and often scored to create a key for subsequent layers.
- 4. Second Coat Application:The second coat, or “brown coat,” is applied to level the surface and achieve a uniform thickness.
- 5. Finishing Coat:A final coat is applied and smoothed to achieve the desired texture and finish, such as a sponge finish or trowel texture.
- 6. Curing:The plastered surface is properly cured to ensure it hardens and gains strength, which is crucial for its durability.
- 7. Inspection and Touch-Up:The finished surface is inspected for any flaws, and any necessary touch-ups are performed to ensure a seamless result.