RoofhareI’ve been seeing samples of this deep blue-green (birch?) wood and I was wondering if this is considered spalting by fungi or if there is an other cause. Any ideas out there?
wedgeIt seems due to the lignicolous fungi (Ascomycetes class); it can be a bright blue to black. Apparently it does not, by itself, impact the woods cellular components thus its mechanical properties are retained. However, it does make the wood more permeable to moisture and therefore more vulnerable to another fungus, lignivorous, which does later decompose the wood.
https://construction.groupeberkem.com/en/news/wood-blueing-causes-treatment/
