What works on greyed vertical wood surfaces?

Wooden fences and garden houses are constantly exposed to the elements. Over time, greying occurs due to UV rays breaking down the lignin in the wood. Once this binding agent is gone, a dull, fibrous surface layer remains. On vertical surfaces like fences and walls, this is especially noticeable as rainwater runs down and leaves behind dirt streaks. The wood appears dull, weathered and unevenly discoloured. Many believe such wood can't be saved – but with the right treatment, it absolutely can. The key is using a product designed for vertical applications: it must not drip and must clean deeply without damaging the wood. A thorough cleaning can restore the wood’s natural colour and prepare it for long-term protection against future weathering.

Woca Exterior Deep Cleaner has a thick, drip-free consistency – perfect for vertical applications like fences.

Woca Exterior Deep Cleaner is ideal for restoring greyed wood on vertical surfaces such as fences, façades and garden houses. Its high viscosity ensures the product stays in place and doesn't run, making application easy even on hard-to-reach spots. It’s ready to use and doesn’t require dilution. After wetting the surface, apply the gel with a brush, roller or sprayer. The cleaner penetrates deep into the wood and removes grey fibres, dirt and old oil layers. After 15–20 minutes, scrub with a stiff brush and rinse thoroughly with water. After at least 48 hours of drying, the wood is ready for treatment with WOCA Exterior Wood Oil. This brings back the natural tone and lively appearance of fences and garden houses.