Where’s the job?

Overview

• Spray application of render on exterior walls utilises specialised spray equipment for a fast, even and modern finish.

• Skill level: 3 / 5 (requires proper surface preparation, mixing accuracy and handling of spray equipment).

• Typical duration: 1 – 2 days depending on the building size and weather conditions.

Safety First

• Ensure the work area is secured and utilise appropriate scaffolding or ladders when working at height.

• Wear personal protective equipment (PPE) such as a face mask, goggles and gloves to protect against airborne particles.

• Check that all equipment is correctly maintained to prevent accidental leakage or malfunction.

• Be mindful of overspray areas; ensure clear demarcation to avoid property damage.

Tools & Materials

Step-by-Step

1. Prepare the substrate – clean, remove loose material and dampen surfaces to ensure good adhesion.

2. Mix the render following manufacturer’s guidelines until a consistent, pumpable texture is achieved.

3. Set up the spray equipment – attach the render mix to the spray gun and test the air pressure.

4. Conduct a test spray on a scrap board or inconspicuous area to adjust nozzle settings and pressure.

5. Execute the spray application using even, overlapping strokes to achieve a uniform finish.

6. Inspect the applied render for consistency, adjust spray technique if necessary and manage overspray.

7. Allow the render to cure as recommended, ensuring proper moisture retention and protection from adverse weather.

Completion Checks

• Render is evenly applied with a consistent thickness and free of trowel marks or overspray.

• All test patches meet the required finish standards and no areas are left untreated.

• The render is properly cured, with no signs of cracking or premature drying.

• Final touch-ups have been made where necessary to ensure a durable, weatherproof finish.

When to Call a Pro Instead

If the project involves difficult-to-access areas, significant structural repairs or requires compliance with building regulations, it is advisable to engage a professional with expertise in spray rendering for quality assurance and warranty protection.