Chemical delignification is a form of timber deterioration that affects roof structures, particularly timber battens supporting metal or terracotta roof tiles. Often referred to as “hairy timber,” this process weakens the timber over time and can eventually compromise the structural safety of the roof — in some cases making it unsafe to walk on.
In this guide, we explain what chemical delignification is, where it occurs, what causes it, when it becomes a structural defect, and how it can be identified, managed and prevented. Understanding this issue early can help property owners avoid costly repairs and serious safety risks.
Continue reading “A Guide To Chemical Delignification”
