How do I prepare modular and portable buildings for painting?

Preparing your modular or portable building for painting is a crucial step to ensure that your coating adheres properly and provides a long-lasting finish.

Here is a step-by-step guide, inspired by our guide on preparing metal fabrications but tailored for modular and portable buildings.


1. Inspection: Start with a thorough inspection of the surface. Check for any signs of damage, rust, or existing coatings that might interfere with the new paint. If the building has been previously painted, assess the condition of the existing paint. If it is in good condition, it might not need to be completely removed.

2. Cleaning: Cleaning the surface is vital for a good finish. Use a mild detergent and water to remove dirt, grease, or any contaminants that could prevent the new paint from adhering properly. After cleaning, ensure the surface is thoroughly rinsed and dried.

3. Repair and restoration: If you have found areas of damage or corrosion during the inspection, now is the time to deal with them. Sanding or grinding may be needed to remove rust and create a smooth surface. Any holes or cracks should be filled and sanded down.

4. Sanding: Whether you’re dealing with an old painted surface or a new one, sanding is crucial for proper paint adhesion. Use a suitable grade of sandpaper to lightly abrade the surface. This will help the primer bond with the surface.

5. Masking: Protect areas that you do not want to be painted. Use a quality painter’s tape and masking materials to cover windows, doors, and any hardware.

6. Priming: Apply a primer to the surface. This provides a base for the topcoat to adhere to and can help to increase the lifespan of the paint job. Remember, for modular and portable buildings, a water-based primer is typically recommended due to its adhesion properties, environmental friendliness, and ease of use.

7. Final inspection: Before applying the finish, conduct a final inspection to ensure the surface is clean, dry, and adequately primed.

By following these steps, you can effectively prepare your modular and portable building for painting, ensuring that the new coating will not only look great but will also last longer.


Check out the modular range here.


Need more guidance?

For more on how we can help you, download our Specialist Coatings for Modular Buildings guide.

In this guide you will

  • Discover the five biggest challenges in effectively coating modular buildings
  • Unearth the key things to look for in a modular buildings coating partner
  • Learn what a high-quality modular building coating portfolio includes
  • See why you should consider partnering with Pronto Paints.