24/03/2025 12:00 AM
After a very wet and damp winter, many of us are searching for ways to remove algae from our fence panels to restore our garden’s look. Algae build up on fence panels is common during winter as cold conditions create the perfect environment for algae, mould and mildew to thrive.
How Winter Affects Fence Panels
Winter takes a toll on fence panels in several ways. Persistent rain and damp conditions can lead to moisture absorption, which encourages the growth of algae, moss, and mildew. Frost and fluctuating temperatures can also cause wood to expand and contract, potentially leading to cracks or warping. Additionally, strong winds and storms may result in debris accumulation, further contributing to algae growth by trapping moisture against the panels.
How to remove Algae from fence panels
If your fence has developed a green or blackish layer of algae over the winter, here’s how you can restore its appearance:
Brush Away Loose Debris: Gently dust the fence using a brush to remove surface dirt, leaves, and any loose algae growth. This helps expose the deeper layers of algae that need treatment. Always brush along the direction of the grain to prevent marks.
Prepare a Cleaning Solution: A simple and effective cleaning solution can be made using eco-friendly and household items:
- Mix equal parts white vinegar and water, or
- Use soapy water
- A mix of baking soda and water can also work well.
Scrub the Surface: With a brush or sponge, gently scrub the fence to remove the algae build-up. Do not rub across the grain as it is likely to leave marks. A light, cold-water pressure washer (such as Karcher) can be used, but care must be taken not to damage the surface of the timber.
Preventing Future Algae Growth
- Trim nearby plants: Ensure that plants and shrubs are not touching the fence, as they can trap moisture and encourage algae growth. If you use your fence to support climbing plants, ensure these are cut back after every growing season to provide air circulation.
- Don't pile plant matter near your fence: Dead leaves and branches are often piled up by fence panels, but this can cause damp and create in ground conditions.
- Improve drainage: Prevent water from pooling near the base of the fence by improving drainage around your garden.
- Regular cleaning: Periodically clean your fence, even if algae hasn’t appeared, to remove dirt and grime that may contribute to growth.
Fence panels are often treated with a less concentrated solution of a timber treatment as they, if installed correctly, should not come into contact with the ground. This is why it’s essential to use gravel boards beneath the fence panel as they are treated for ground contact and are therefore thoroughly protected against rot and insect attack.
Why Some New Fence Panels Appear Green
If you've recently installed new fence panels, you may notice a slight green tinge on the surface. This is due to the timber treatment process, where pressure-treated wood is infused with a preservative to enhance durability and resistance to decay. The greenish hue is temporary and will fade naturally over time as the wood weathers.
By keeping on top of fence maintenance and addressing algae growth promptly, you can ensure your garden remains a beautiful and inviting space throughout the warmer months. Regular cleaning and proper treatment will not only enhance the appearance of your fence but also extend its lifespan, making it a worthwhile investment in your outdoor space.
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Our fence panels don't need painting or staining to prolong longevity.