Machine Spraying EWI Pro Premium Base Coat: The Time-Saving Rendering Technique You Need to Know

Rendering is a vital step in creating a smooth, durable, and weather-resistant finish for exterior walls. In recent years, advanced tools and materials have revolutionized the process. One standout innovation is machine spraying EWI Pro Premium Base Coat — a method that’s faster, more efficient, and produces superior results compared to traditional hand application.

In this post, we’ll break down exactly how the process works, why it’s so effective, and tips to get the best finish for your project.

Why Choose EWI Pro Premium Base Coat?

The EWI Pro Premium Base Coat is the highest-quality base coat available for thin coat render systems. Packed with reinforcement fibers, it offers:

Exceptional strength – Ideal for preventing cracks.
Durable bond – Designed for maximum adhesion to substrates.
Long-lasting performance – Withstands weather conditions and general wear.

Its fiber-reinforced formula makes it particularly well-suited for machine spraying, which forces the material deep into the surface for a stronger hold.

Machine Spraying vs. Hand Application

Traditional rendering by hand has its merits, but machine spraying offers a number of advantages:

Speed – Spraying is significantly faster, allowing you to cover large areas quickly.
Reduced physical strain – Less trowel work means less wear on your arms and back.
Stronger bond – The spraying action literally blasts the render onto the wall, embedding it firmly.
Consistent thickness – Less room for error compared to manual spreading.

The difference in efficiency is clear — especially on large projects where time savings translate directly into cost savings.

Step-by-Step: Machine Spraying EWI Pro Premium Base Coat

Here’s how the process unfolds on site:

1. Prepare the Render Machine

Load 3–4 bags of EWI Pro Premium Base Coat into the hopper.
Flush the hose with water to ensure a clean start.
Keep a half-filled bucket of water nearby — when pausing, place the hose in it to prevent the render from hardening inside.

2. Prime and Mark the Application Area

Make sure the wall section is primed and ready.
It’s common to start with the perimeter before filling in the main section.

3. Spray the Base Coat

Begin spraying from the edges inward.
The machine’s power helps force the material onto the wall, ensuring excellent adhesion.

4. Achieve the Right Thickness

Standard recommendations suggest a 6mm notched trowel, but many professionals prefer using a 10mm notched trowel.
Why 10mm? It ensures the mesh embeds fully without reducing thickness below the desired level.

5. Embed the Reinforcement Mesh

Work in 1-meter-wide sections — the width of the reinforcement mesh.
Press the mesh into the fresh base coat, making sure it’s fully embedded.

Pro Tip: Avoid Thin Applications

One common issue with base coat application is going too thin, especially when using a 6mm notched trowel. Pressing the mesh too hard can reduce the coat to just 3–4mm, weakening the finish. By using a 10mm trowel, you:

Guarantee adequate thickness.
Reduce the risk of cracking.
Improve durability.

The Role of the Render Machine

The render machine isn’t just a time-saver — it’s a performance booster. Here’s why:

Consistent pressure means uniform application.
Less mixing downtime – Continuous spraying keeps the project moving.
Improved bond strength – The forced application embeds the render better than hand troweling.

With this method, even large exterior walls can be rendered efficiently without sacrificing quality.

Why This Method Works Best for EWI Pro Premium Base Coat

The fiber-reinforced nature of EWI Pro Premium Base Coat pairs perfectly with machine spraying because:

The spray’s impact helps interlock fibers and substrate.
The coat maintains its integrity during and after application.
The result is a robust, crack-resistant surface.

This synergy between product and technique is what makes the method so effective.

Final Thoughts

Machine spraying EWI Pro Premium Base Coat is a game-changer for professional renderers. Not only does it save time and energy, but it also produces a more durable, high-quality finish. By pairing the right materials with the right technique, you ensure a result that looks great and stands the test of time.

Whether you’re a tradesperson looking to improve efficiency or a homeowner wanting the best finish possible, this method is worth considering.