Don’t paint your Render !

Maintaining the exterior of your home is essential for its longevity, aesthetic appeal, and overall value. Rendered walls, in particular, require special care to ensure they stay in good condition. If your render is dirty or stained, it might be tempting to grab a paintbrush and cover it up. However, painting over dirty render is one of the worst mistakes you can make. Here’s why you should avoid this common pitfall and what you should do instead.

The Dangers of Painting Over Dirty Render

1. Traps Dirt and Moisture Painting over dirty render locks in the dirt, algae, and other contaminants already present. Over time, this can lead to moisture retention, causing the render to deteriorate from within.
2. Prevents the Render from Breathing Render is designed to be breathable, allowing moisture to escape from your walls. Painting over it—especially if using non-breathable paint—creates a seal that traps moisture. This can lead to damp problems, peeling paint, and even structural damage over time.
3. Worsens Moisture and Damp Issues Dirty render often harbors moss, algae, and other organic growths that thrive in damp conditions. Painting over them doesn’t solve the underlying issue; instead, it exacerbates it. The trapped moisture encourages further growth, leading to unsightly stains and potential damage to your walls.
4. Reduces the Lifespan of Your Render Without proper cleaning and preparation, paint will not adhere properly to the render. This can result in flaking and peeling, meaning you’ll have to repaint much sooner than expected. Worse, it can compromise the integrity of the render itself, leading to costly repairs.

What to Do Instead

To ensure your render remains in excellent condition and avoid the issues mentioned above, professional cleaning is the best course of action. Here’s how to do it the right way:

1. Use a Biocide Treatment Biocides are highly effective in killing moss, algae, and other organic growths on your render. A professional cleaning service will apply a biocide solution to penetrate deeply into the surface, ensuring a thorough clean.
2. Soft Brushing Instead of harsh scrubbing or high-pressure washing, which can damage the render, opt for soft brushing. This gentle approach removes dirt and grime without compromising the integrity of the surface.
3. Apply a Bleach Solution For stubborn stains and organic growth, a diluted bleach solution can work wonders. It not only cleans but also disinfects the surface, preventing regrowth. Always ensure this step is carried out by professionals who can use the correct concentration to avoid damage.
4. Regular Maintenance Once your render is clean, maintain it by scheduling periodic cleanings and inspections. This prevents dirt and growth from building up, keeping your walls in pristine condition without the need for frequent painting.

Why Professional Cleaning Is Essential

While some homeowners might attempt DIY cleaning, professional services are highly recommended for several reasons:

• Specialized Equipment: Professionals use industry-grade tools and solutions that are both effective and safe for your render.
• Expertise: They can identify the specific type of dirt or growth on your walls and tailor their approach accordingly.
• Long-Term Results: A professional cleaning not only removes existing dirt but also applies preventative treatments to keep your render clean for longer.

The Bottom Line

Painting over dirty render might seem like a quick fix, but it can lead to significant problems down the line, including moisture retention, damp issues, and compromised structural integrity. Instead, invest in professional cleaning to restore and maintain the appearance and health of your render. By using biocide treatments, soft brushing, and bleach solutions, you’ll ensure your walls remain clean, breathable, and free of damage—all without the need for a fresh coat of paint.