Depending on the type, treatment, maintenance, and various other factors, timber merchants can expect a lifespan of 40 to 60 years for the high-quality wooden cladding. The breakdown process begins from the moment the tree cuts the wood. However, this process is gradual, leads to amazing natural changes in the wood, and can slow down. The untreated outer shell is easy to rot, mold rot, insects, weathering, etc. Treating wood panels can help maintain moisture levels, reducing the risk of mold rot. The Brunner treatment is a mixture of preservatives and Brunel pigments.