Plastering Procedure on Concrete Surface

Plastering concrete surfaces is a critical component of construction that involves the application of lean mortar to enhance not only the visual aesthetics but also the durability and structural integrity of the surface. In this comprehensive guide, we delve into the intricacies of plastering concrete surfaces, encompassing various methods applicable to different types of concrete compositions. Additionally, we address essential safety measures, ensuring the integrity of the work and the well-being of those involved.


Plastering of concrete wall

Plastering Procedure on Concrete Surface

The plastering process for concrete surfaces can be distilled into a systematic series of steps:

1. Surface Preparation

Before embarking on plastering work, meticulous surface preparation is paramount. To ensure optimal bonding between the plaster and the concrete, the surface to be plastered must undergo thorough cleaning. This involves the removal of any peeling paint, flaking remnants of old plaster, and the eradication of contaminants such as paint, oil, and dust. A pristine surface is the foundation for a successful plastering project.

2. Treating with Slurry

To create an ideal substrate for plaster adhesion, the concrete surface must possess a suitable degree of roughness. Achieving this is accomplished through the application of a slurry or dash. This slurry is meticulously concocted by mixing one part cement with one and a half parts coarse sand, blended with an appropriate quantity of water to attain a fluid consistency. This preparatory step establishes an essential base for the forthcoming plaster layers.

3. Mixing of Plaster

The art of mixing plaster entails the amalgamation of precise proportions of fine aggregate (sand), cement, and water to yield the desired consistency of plaster suited for the specific task at hand. This mixture must be deployed within a strict two-hour timeframe to ensure its workability and effectiveness.

4. Applying the Plaster

The application phase necessitates the skilled use of a steel trowel to administer a base coat of plaster onto the slurry-coated surface. This plaster layer should ideally measure between 10 to 15 mm in thickness. Application is performed meticulously in small, even strokes, guaranteeing uniformity and a level surface. In cases where a single-layer application is employed, the thickness should not exceed 10 to 15 mm, while the topcoat should measure 5 to 10 mm in thickness.

5. Curing of Plaster

Once the plaster has been expertly applied and has undergone the process of setting and hardening, curing must commence and endure for a minimum duration of seven days. This critical stage is pivotal in ensuring the longevity and structural soundness of the plastered concrete. Following the drying period, the surface is primed for the application of paint or wallpaper.



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