The Ultimate Guide to Painting on Plasterboard

When it comes to painting plasterboard, the way you approach the process can make or break the final look and durability of your walls. Whether you’re a DIY enthusiast, a professional painter, or a seasoned tradie, this comprehensive guide will help you achieve flawless results that will stand the test of time. 

From preparing the surface to selecting the right finish, let’s dive into everything you need to know about painting on plasterboard.

Why Proper Painting Matters

Plasterboard walls consist of multiple surfaces with varying porosity, which can affect how the paint adheres. A proper painting process ensures:

• A uniform finish that enhances the aesthetics of your space.
• Durability to withstand wear and tear over time.
• Compliance with Australian Standards for a professional-grade finish.

Failing to follow the correct procedures can lead to issues such as cracking, uneven surfaces, or gloss banding, which detracts from the overall appearance.

Preparing Plasterboard for Painting

Preparation is the foundation of a quality finish. Follow these steps to get your plasterboard ready for its first coat of paint:

1. Inspect and Sand:
   • Ensure all joints, corners, and fixings are properly sanded.
   • Aim for smooth, even surfaces with feathered edges to minimise imperfections.
2. Clean the Surface:
   • Remove all dust and debris using a damp cloth or vacuum.
3. Drying Time:
   • Allow plasterboard joints to dry completely before painting. Delayed painting can lead to moisture reabsorption and surface cracking.
4. Timing:
   • Paint as soon as possible after installation to avoid the joints absorbing excess moisture.

Choosing the Right Finish

Finish Levels

The finish level of plasterboard plays a crucial role in the final outcome. Here’s what you need to know:

• Level 4 Finish:
  • Standard for most painted walls.
  • Suitable for light and neutral-colored paints.
• Level 5 Finish:
  • Recommended for high-gloss or dark-colored paints.
  • Ideal for areas with glancing light, which can highlight surface imperfections.
  • Involves an additional skim coat to even out the surface.

Paint Selection

For the best results, adhere to the AS/NZS 2311 Australian Standard, which specifies a three-coat system:

1. Sealer Undercoat: Ensures uniform porosity.
2. Two Top Coats: Provides the desired color and finish.

Application Methods

Brush, Roller, or Spray?

Each method has its pros and cons. Here’s how they compare:

• Brush:
  • Best for cutting in edges and tight corners.
  • Time-consuming for larger areas.
• Spray:
  • Ideal for speed and large-scale projects.
  • Requires back-rolling to achieve a consistent texture.
  • Over-spray can be challenging to control.
• Roller:
  • Provides the best results for most projects.
  • Creates a uniform texture that conceals minor imperfections.
  • Ensures a seamless blend between plasterboard and joints.

Special Considerations for Wet Areas

Kitchens, bathrooms, and laundries are prone to moisture and wear. For these spaces:

• Use semi-gloss or full-gloss paint for added durability and resistance to mould.
• Ensure a Level 5 finish for a smooth, even surface.
• Follow all standard painting procedures for maximum longevity.

Tips for Dark and High-Gloss Paints

Dark colors and glossy finishes can magnify imperfections. To ensure the best outcome:

• Always opt for a Level 5 finish.
• Use high-quality materials and tools for precision.

Common MIstakes to Avoid

1. Skipping the Sealer:
   • This step is essential for a long-lasting finish.
2. Rushing the Process:
   • Proper drying time between coats is crucial.
3. Ignoring Manufacturer Guidelines:
   • Follow the recommendations of paint and plasterboard suppliers to maintain warranties.

Remember

Painting plasterboard is the final step in bringing a project to life. By following industry standards and best practices, you’ll create a stunning, durable finish that adds value and aesthetics to any space. Whether you’re transforming a home or completing a commercial project, a little extra care during the painting process will go a long way.

For expert advice, premium plasterboard products, or additional tips, get in touch with us.

Happy painting!