Exposure to Weather | Sapstain Mould | Bluestain Mould | Iron Staining
Earlier this month (May 2016), Preschem was asked to give a presentation on why timber changes colour at the Victorian Woodworkers Association. This got us thinking that this topic would make a great general knowledge post. After all, this will assist with some of those decisions on what to do when building something out of wood.
Why does timber change colour?
- Exposure to weather, including UV and rain
- Staining due to natural or introduced causes
- Chemical changes within the wood resins, or “extractives”