Pergola Blueberry D3.5m x W5m
UK Timbersolution
£3990
Protect Paving and Brick from Oak Tannins If you’ve recently added a green oak pergola, gazebo, or timber frame, you may have noticed dark brown stains on your paving or brickwork. These marks are caused by oak tannins – a natural compound in fresh oak that leaches out when wet. Although harmless to the wood, tannins can leave unsightly stains on porous paving, stone, or brick. The problem is strongest in the first year after installation. The photos show how tannins from the oak structure have leached out and stained the new paving. Rainwater washed tannins from the timber onto the surface, l
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