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08 // SHOWER AND WET AREAS
For standard-compliant waterproofing in interior spac-
es, DIN 18534 has been in force since mid-2017. It has
replaced the previous stress classes 0-C and introduced
the water impact classes W0-I to W3-I in their place. They
define low, moderate, high and very high water impact,
regardless of the private or public environment. The
distinction between “public and private” no longer exists.
W0-I
W1-I
W2-I
Floor and wall surfaces of water impact classes W2-I and
W3-I must always be sealed. Floor surfaces of water im-
pact class W1-I must always be sealed, wall surfaces only
if they are sensitive to moisture (such as gypsum boards,
gypsum plaster) or working water can penetrate into mois-
ture-sensitive component layers (for example insulation
layers). Floors and walls that only rarely come into contact
with splash water (W0-I) and moisture-insensitive walls
in water impact class W1-I do not necessarily have to be
sealed.
DIN 18534 „ABDICHTUNG VON INNENRÄUMEN“
THE FOLLOWING GUIDELINES SIMPLIFY THE APPLICATION: