How to Use an Automatic Mortar Jetting Machine for Rendering

How to Use an Automatic Mortar Jetting Machine for Rendering

Using an automatic mortar jetting machine for rendering walls offers an efficient and precise approach to achieving a smooth or textured exterior finish. Here is a step-by-step guide to using the machine for rendering:

1. Prepare the Surface

• Clean the wall: Remove dirt, dust, and loose materials from the wall to ensure proper adhesion of the render.
• Wet the surface: Moisten the wall lightly to improve adhesion and reduce suction, preventing the render from drying too quickly.

2. Mix the Mortar

• Use a proper mortar mix suitable for rendering. Typically, the mixture is a blend of sand, cement, lime, and water in a ratio depending on the finish required.
• Ensure the mixture has a consistent and smooth texture.
• If using pre-mixed mortar, follow the manufacturer’s guidelines for preparation.

3. Set Up the Machine

• Assemble the equipment: Connect the jetting machine to its power source (electric or pneumatic, depending on the model).
• Check the nozzle: Choose the appropriate nozzle size based on the desired texture and application area.
• Load the mixture: Pour the prepared mortar into the machine's hopper or feeding system.

4. Apply the Render

• Start spraying: Hold the nozzle at a consistent distance from the wall (typically 10–15 cm) and spray in smooth, overlapping strokes to ensure even coverage.
• Control the thickness: Adjust the machine settings to control the mortar flow rate and the thickness of the applied layer.
• For textured finishes, vary the spray angle or use specialized nozzles.

5. Smooth or Texture the Surface

• Use a trowel, sponge, or float to smooth the surface while the mortar is still wet.
• If a textured finish is desired, create patterns or designs using tools or leave the spray pattern as is.

6. Curing

• Allow the render to dry slowly by keeping the surface moist for a few days, especially in hot weather, to prevent cracking.

Advantages of Using an Automatic Mortar Jetting Machine

• Efficiency: Reduces labor time compared to manual rendering.
• Cost-effective: Minimizes material wastage and labor costs in the long run.
• Precision: Ensures uniform thickness and a high-quality finish.
• Versatility: Can achieve both smooth and textured finishes.

Conclusion

Investing in an automatic mortar jetting machine is a step toward modernizing construction processes. While the initial cost may seem high, the long-term benefits include improved efficiency, superior quality, and reduced labor efforts. By adopting such technologies, you enhance the durability and aesthetics of your projects, contributing to overall success.