Lightweight Brick Plastering Guide for a Smooth and Durable Surface

Lightweight bricks are a popular choice in modern home construction due to their light weight, quick installation, and neat wall finish. However, to ensure a smooth, strong, and durable final wall, the plastering process must be carried out correctly. Improper plaster can cause hairline cracks, wavy surfaces, and even reduce the wall's durability.
Here's a complete guide on how to properly plaster lightweight bricks.

1. Ensure the Surface of the Lightweight Bricks is Clean and Dry
Before beginning the plastering process, ensure the surface of the lightweight bricks is free of dust, oil, or cement residue. Dirt can reduce the adhesion between the plaster and the brick surface.
Use a brush or blower to clean the wall surface, and allow the bricks to dry completely for optimal plaster results.

2. Use Mortar or Plaster Specifically for Lightweight Bricks
For best results, use instant mortar or plaster specifically for lightweight bricks, which have high adhesion and flexibility.
This type of mortar has been formulated to suit the characteristics of lightweight bricks, which are smoother and have fewer pores than red bricks.
In addition, instant mortar also has the following advantages:

• Mixing is easier and faster.
• The plaster will be more even and less prone to cracking.
• Saves time.

3. Wet the Surface Before Plastering
To ensure the plaster adheres perfectly, wet the surface of the lightweight brick with clean water before plastering.
This reduces the water absorption of the plaster by the lightweight brick, so the mortar remains moist and easy to spread.

4. Adjust the Plaster Thickness Evenly
Ideally, the thickness of the lightweight brick plaster should be around 1–2 cm. If it's too thick, the plaster will crack easily; if it's too thin, the surface will be difficult to level.
Use an aluminum ruler or leveling wheel to ensure the plaster is smooth and consistent across the entire wall.

5. Use Fresh Mixture
Mix the mortar in sufficient quantity and use it immediately after mixing. Do not add water if the mortar starts to dry out, as this can reduce the bonding quality.
Also, ensure the mixing is done evenly to prevent the plaster from being soft on one side and hard on the other.

6. Finishing and Post-Plaster Maintenance
After the plaster has partially dried, smooth it with a trowel or trowel to achieve an even, smooth surface.
Allow the plaster to dry naturally for several days before painting or applying the next coat.
For best results, avoid direct exposure to heat or wind to prevent the plaster from cracking due to rapid drying.

Conclusion
Good lightweight brick plaster not only enhances the appearance of the wall but also strengthens the structure and increases the building's durability.
By following the steps above—from surface preparation and mortar selection to the finishing process—the plaster will be smooth, strong, and long-lasting.

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