Published On:
January 1, 2024

Painting Over Mould for a Fresh and Healthy Home

Having mould in your home can be both unsightly and unhealthy. It can cause respiratory problems and allergies, and it can also damage the structure of your home if left untreated. While painting over mould may seem like a quick fix, it's important to address the root problem and make sure that the affected area is properly treated and cleaned before applying paint.

In this article, we will guide you through the process of cleaning and painting a damp or mouldy surface, ensuring that your home is fresh and healthy.

Can You Paint Over Mould?

Painting over mould without cleaning it first is not recommended. Mould thrives in damp environments, and simply painting over it will only temporarily hide the problem of ugly stains without addressing the underlying issue. The moisture will still be present, allowing the mould to continue growing beneath the paint.

The final outcome of mould being painted over won't be pleasing to the eyes in t the long run, as the paint may not adhere properly to the mouldy surface, and mould will continue to grow and spread throughout the affected surface. This will lead the paint to chip, peel, and bubble, causing further deterioration.

Why You Shouldn't Paint Over Mould Without Cleaning It First

Make sure to treat mould first before painting over it to avoid serious consequences for your home and your health. As mentioned earlier, mould can cause respiratory problems and allergies. By painting over it, you are essentially trapping the mould spores behind a layer of paint, allowing them to continue releasing allergens into the air. This can lead to ongoing health issues for you and your family.

Furthermore, painting over mould without addressing the root cause of mould growth will not solve the problem. The mould will continue to thrive and spread, potentially causing further damage to the structure of your home.

How to Clean and Paint a Damp or Mouldy Surface or Wall

Now that we have established that we should clean the mouldy wall first before applying your everyday paint, we will now discuss the steps for cleaning and painting over the mould growth. When doing so, make sure to wear protective gear like a mask and rubber gloves to prevent you from directly coming in contact with any loose material like mould spores or dust particles.

Identify the Sources of Mould

Before you can effectively clean and paint a mouldy surface, you need to identify the sources of the musty-smelling mould that affects your household. Mould typically thrives in areas with high humidity or water leakage. Inspect your home for any signs of water damage, leaks, or condensation. Common areas where mould can occur include bathrooms, basements, and areas with poor ventilation.

Treat and Clean Mouldy Surfaces Using Household or Commercial Cleaning Agents

Once you have identified the sources of mould, it's time to treat and clean the affected areas. M

There are several household or commercial cleaning agents that can effectively remove mould. Some common options for a DIY surface mould remover include bleach, white vinegar, and hydrogen peroxide. You may also opt for store-bought specialised mould cleaners for added convenience. Follow the instructions on the product label and ensure proper ventilation while cleaning.

Use a scrub brush or sponge to thoroughly clean the mouldy area, removing any visible mould growth. Rinse the surface with clean water and allow it to dry completely before proceeding.

Prepare the Surface by Filling and Using Abrasives

After the surface has dried, it's important to prepare it for painting. Fill any cracks or holes with a suitable filler and use abrasive paper products such as sandpaper to smooth out the surface. This will ensure that the paint adheres properly and provides a smooth finish.

Use a Sealant or Primer

Before you start painting, it's recommended to use a sealant or primer specifically designed for damp or mouldy surfaces. This will create a barrier between the surface and the paint, preventing any moisture or mould from seeping through, thus ensuring long-lasting protection from mould growth. Apply the sealant or primer according to the manufacturer's instructions, ensuring that you cover the entire affected area.

Apply Mould-Resistant Paint or Moisture-Resistant Paint

Once the sealant or primer has dried, it's time to apply the paint.

When choosing a paint, opt for a moisture-resistant or mould-resistant paint. These types of paints are specifically formulated to prevent mould growth and withstand damp conditions. They contain additives that inhibit mould growth or provide a protective barrier against moisture.

Apply the paint in thin, even coats, allowing sufficient drying time between each coat. Follow the manufacturer's instructions for the best results.

Choosing Between Moisture-Resistant Paint and Mould-Resistant Paint

Moisture-resistant paint is suitable for areas with moisture issues, while mould-resistant paint is specifically designed to prevent mould growth in damp areas with both moisture issues and less access to direct sunlight.

Mould-resistant paint is specially formulated to inhibit the growth of mould and mildew on the painted surface. It owes its mould-resistant capabilities to the anti-mould additive it contains, such as fungicides (or "mould killer" added to the mixture) that prevent mould spores from thriving. This type of paint is typically used in areas with limited access to sunlight, including shady outdoor areas covered with thick foliage.

Moisture-resistant paint, on the other hand, is designed to prevent excess moisture from penetrating the painted surface. It forms a barrier that helps to repel water and prevent it from seeping into the walls or causing damage. This type of paint is often used in areas that are exposed to moisture, such as exterior walls or areas with high moisture levels, like bathrooms and basements.

Apply Another Coating of Oil-Based Paint

After the moisture-resistant or anti-mould paint has dried, you can apply another coating of oil-based paint for added durability and protection. Oil-based paints are known for their resistance to moisture and can provide an extra layer of defence against mould growth. Apply the oil-based paint according to the manufacturer's instructions, ensuring proper ventilation during the application process.

Apply the Top Coating of Emulsion Paint

To complete the painting process, apply a top coating of emulsion paint. Emulsion paint is water-based and provides a smooth, decorative finish. Choose a colour that complements your home's interior or exterior design. Apply the emulsion paint in thin, even coats, allowing sufficient drying time between each coat. Follow the manufacturer's instructions for the best results, and ensure that the painted surface is fully dry before using the room or area.

When to Employ Professional Mould Removal Services

In some cases, the mould problem may be too severe or extensive to be effectively treated and painted by yourself. If you have tried cleaning and painting the mouldy surfaces but the mould keeps recurring, or if the affected area is large or difficult to access, it may be time to employ professional mould removal Singapore services.

Professional mould remediation experts like our specialists in Nimbus Homes have the knowledge, experience, and specialised equipment to effectively remove mould before it causes permanent damage to your home and ensure that it does not return. We can also identify and address any underlying issues that may be contributing to mould growth.

If you're unsure about the severity of your mould problem or if you have any concerns about tackling it yourself, it is always best to consult with professionals for a thorough assessment and appropriate recommendations.

Final Words

Painting over mould without proper cleaning and preparation can lead to ongoing mould growth and potential health risks. Remember to identify and address the sources of mould, treat and clean the affected surfaces, prepare the surface for painting, and choose the appropriate paints for moisture resistance and anti-mould properties.

If the mould problem persists or if it is extensive, do not hesitate to seek professional assistance. With proper care and attention, you can transform your mouldy space into a clean and inviting environment for you and your family.