Prevent mold attack
Wood is a ideal material to avoid mold attacks. Wood is a breathable material, therefor it is absolutly unnessesary to use membranes in wood construction.
STEKO recomands to cover inside walls, if necesary, directly with drywall and the outside wall with insulation material, like mineral or sheep wool or wood fiber boards and cover the insulation with a windpaper and plank it with a front