Solid wood planks must not be installed in areas where
splashing shower water may get onto the floor. Standing water will permeate
into the wood and can lead to permanent damages. Solid wood planks should not
be installed in permanently moist rooms or wet surroundings (saunas, bathrooms
etc.) because the danger of penetration with moisture can never be ruled out
completely. If solid wood flooring is supposed to be installed in a bathroom,
it is important to make sure that it is not installed in areas subject to
splashing water (i.e. from shower, bathtub, lavatory or sink) and that the
relative humidity in the room stays within the normal range between 50 and 65% continually,
any formation of puddles and moisture penetration must be avoided all around
the corners of the room, for the joints as well as the whole flooring area.