When the surface becomes wet and is exposed to dirt, small green or black algae spots may begin to form. Black spots are usually just dirt and can be brushed off. However, they appear far less frequently on properly treated surfaces. A proper treatment also helps prevent algae from penetrating the wood.
For example, WOODCARE.GUIDE Natural Terrace Protector creates a protective, dirt-repellent layer on the wood surface. In addition to wood surfaces, the product is also suitable for stone, brick, concrete, and even painted surfaces.
Green and black algae can grow on almost any surface, including metal and stone. When cleaning your deck, algae can usually be removed easily with a brush and water. Avoid using a pressure washer, as excessive force may damage the surface and require reapplication of the protective treatment to reseal the wood. If you do use a pressure washer, make sure to use a dedicated deck nozzle to prevent damage from excessive water pressure. In cases of heavy algae growth, stronger cleaning agents may be necessary.
For best results, use WOODCARE.GUIDE Terrace Wash on old oil-treated wooden surfaces. After washing with Terrace Wash, the surface must always be treated with a wood oil or similar protective product to restore protection. WOODCARE.GUIDE Natural Outdoor Cleaner is the most sustainable option for removing tough atmospheric dirt and organic growth. As a natural enzyme-based cleaner, it requires several weeks to achieve full effect. A faster alternative is WOODCARE.GUIDE Mould & Maintenance Cleaner, although it requires more manual effort and is less effective against atmospheric dirt.
If the surface becomes damaged, especially in more sensitive areas, it is recommended to reapply the protective treatment, such as WOODCARE.GUIDE Natural Terrace Protector or WOODCARE.GUIDE Wood Oil, depending on the surface and desired finish.
