While some moulds (sic) can colonize wood at moisture contents between 15 and 20%, little or no sporulation occurs. Most moulds (sic) require moisture contents above 20% for growth and sporulation. Infection by spores of “wood-rotting basidiomycetes” [WRB] probably does not occur at wood moisture contents below about 29% ...The mycelium and mycelial cords of WRB can colonize wood below the fibre (sic) saturation point, possibly down to 20% mc, provided they are growing from a substrate at a higher moisture content.