How to Paint Hardie Board Siding

Learn the proper method for painting Hardie Board siding to ensure a long-lasting, beautiful finish.

Introduction

James Hardie fiber cement siding, commonly known as Hardie Board, is a popular choice for homeowners due to its durability and resistance to rot and pests. However, like any exterior surface, it eventually needs a fresh coat of paint to maintain its curb appeal and protection.

At Canvas Home Painting, we follow a specific process to ensure your Hardie Board siding looks great and stands up to the elements.

The Process: Clean, Dry, Paint

Painting Hardie Board isn’t complicated, but it does require attention to detail, especially during the preparation phase.

Step 1: Soft Washing

The most critical step in painting any exterior is starting with a clean surface. For Hardie Board, we use a soft wash method.

  • Why Soft Wash? High-pressure power washing can damage the siding or force water behind the planks, leading to mold and rot. Soft washing uses low pressure and a cleaning solution to gently remove dirt, grime, and mildew.
  • The Method: We apply a mixture of soap and water to the siding, letting it sit for a moment to break down contaminants. Then, we gently rinse it off, ensuring all residue is removed without harming the material.

Step 2: Drying Time

After washing, patience is key. The siding must be completely dry before any paint is applied. Trapping moisture under new paint is a recipe for peeling and bubbling. We typically allow for 24-48 hours of drying time, depending on the weather conditions.

Step 3: Painting with Sherwin-Williams Emerald Exterior

Once the surface is clean and bone-dry, it’s time to paint. We exclusively use Sherwin-Williams Emerald Exterior Acrylic Latex Paint.

  • Why Emerald? This is a top-tier paint known for its exceptional durability, resistance to blistering and peeling, and excellent color retention. It provides a mildew-resistant coating that is perfect for fiber cement siding.
  • Top Colors: It looks incredible in deep, modern tones like Iron Ore SW 7069 or sophisticated neutrals like Slate Tile SW 7624.
  • Application: We apply 2 coats of Emerald Exterior in your color of choice. Two coats ensure full coverage, true color depth, and maximum protection against the harsh Ontario weather.

Maintenance Tips

To keep your freshly painted Hardie Board looking its best:

  • Inspect it annually for any signs of damage or wear.
  • Gently clean it with a garden hose and soft brush if it gets dirty.
  • Keep shrubs and trees trimmed back to prevent them from scratching the paint or trapping moisture against the siding.

Conclusion

Painting your Hardie Board siding is a smart investment that boosts your home’s value and curb appeal. By following the proper soft wash and two-coat method, you can enjoy a beautiful exterior for years to come.

Ready to refresh your home’s exterior? Canvas Home Painting is here to help.

Get a free quote today!