Wood is a natural material and, even when treated with a wood protection or a preservative, it can be impacted by dirt and atmospheric fallout including fungal spore. Urban environments are particularly prone, but rural environments are not immune as agricultural pollutants and airborne particles can be carried over considerable distances. Dirt and pollution can lead to the formation of algae and fungal growth. Although the SiOO X treatment provides protective resistance to the penetration of algae and fungi, in humid climates such as in the UK and Ireland, they can, in some locations, take hold on the surface and have a negative aesthetic effect. The key is to understand that timber surfaces, no matter how they are treated, need to be cared for and maintained. Early removal of accumulating dirt and any early-stage algae or fungal spore, through a regular care and maintenance programme, will lead to a sustained beautiful appearance. The majority of projects see no impact – it is a matter of particular environments. For more information or support with maintenance please contact us.