Mould is a common issue in homes, especially in damp areas like bathrooms, kitchens, or poorly ventilated spaces. While painting over mould might seem like a quick fix, it’s essential to address the root cause and prepare the surface properly to ensure long-lasting results. In this guide, we’ll walk you through the steps to paint over mould the right way.
Why Is It Important to Address Mould Properly Before Painting?
Mould isn’t just unsightly; it can also affect the durability of your paint and potentially harm your health. Simply painting over mould without treating it can lead to:
- Paint peeling or bubbling as mould continues to grow underneath.
- Discoloration or stains bleeding through the new paint.
- Persistent odours and potential health issues from mould spores.
By following the proper steps, you can ensure the mould is eliminated and prevent it from returning.
What You’ll Need
Before you start, gather the following materials:
- Protective gear: Gloves, goggles, and a mask to avoid exposure to mould spores.
- Cleaning supplies: A scrub brush, a bucket, and a mould-removal solution (vinegar, bleach, or a commercial mould killer).
- Sandpaper: To smooth the surface after cleaning.
- Primer: A stain-blocking or mould-resistant primer.
- Paint: A high-quality, moisture-resistant paint.
- Tools: Paintbrushes, rollers, and painter’s tape.
Step-by-Step Guide to Painting Over Mould
Step 1: Identify and Fix the Source of Moisture
Mould thrives in damp environments, so it’s crucial to identify and address the root cause of moisture. This could include:
- Repairing leaks in pipes, roofs, or windows.
- Improving ventilation in rooms like bathrooms and kitchens.
- Using a dehumidifier to reduce humidity levels.
Without fixing the moisture issue, mould is likely to return.
Step 2: Remove the Mould
Before painting, clean the surface thoroughly to eliminate all traces of mould.
- Wear protective gear to avoid exposure to mould spores.
- Mix a cleaning solution (1 part bleach to 3 parts water) or use a commercial mould remover.
- Scrub the affected area with a brush, ensuring all visible mould is removed.
- Rinse the surface with clean water and let it dry completely.
Pro Tip: For porous materials like wood, you may need to sand the surface after cleaning to remove mould embedded in the material.
Step 3: Prepare the Surface
Once the mould is removed and the surface is dry, prep the area for painting:
- Sand the surface to remove any stains, peeling paint, or rough patches.
- Wipe away any dust or debris with a damp cloth.
- Use painter’s tape to protect surrounding areas.
Step 4: Apply a Mould-Resistant Primer
Priming is a crucial step to prevent mould from returning and to ensure your paint adheres properly.
- Choose a mould-resistant or stain-blocking primer designed for damp areas.
- Apply an even coat of primer to the cleaned surface using a brush or roller.
- Allow the primer to dry fully before moving on to painting.
Step 5: Paint with Mould-Resistant Paint
Use a high-quality, moisture-resistant paint for the topcoat. These paints are specially formulated to withstand humid conditions and resist mould growth.
- Apply 1–2 coats of paint, allowing each coat to dry completely.
- Ensure proper ventilation in the room while painting to help the paint cure properly.
Tips for Preventing Mould After Painting
- Improve Ventilation: Use extractor fans or open windows regularly in damp areas.
- Reduce Humidity: Dehumidifiers can help maintain ideal humidity levels in your home.
- Regular Cleaning: Clean painted surfaces regularly to prevent dirt and moisture buildup.
- Inspect for Leaks: Check for plumbing or roof leaks periodically and address them promptly.
When to Call a Professional
If the mould problem is extensive or keeps returning despite your efforts, it’s best to consult a professional. They can address structural issues, provide advanced treatments, and ensure your home remains mould-free.
Conclusion
Painting over mould isn’t just about covering up the problem—it’s about addressing the root cause, removing the mould, and taking preventive steps to stop it from coming back. By following this guide, you can ensure a clean, mould-free, and long-lasting paint job.
For professional help with painting mould-affected areas, contact our expert team today! We’ll ensure your walls are treated, primed, and painted to perfection.
