Moisture from both external
and internal sources can cause damage to buildings therefore moisture
protection is a primary consideration.
External moisture source is
normally from rain. Internal moisture, usually in the form of humidity,
can cause condensation on the surface of the walls as well as inside
the wall itself.
Moist walls can allow mould and bacteria to grow,
cause surface discolouration and damage to plaster and wall finishes
and may generally create an unhealthy environment.
CELCRETE AAC has
a structure of small air bubbles evenly distributed throughout the
The size of these pores is such that absorption of water
into CELCRETE AAC by capillary action is minimal.
This structure enables
the material to breathe. It is vapour permeable, enabling atmospheric
equilibrium to be maintained, but is, unlike standard concrete, impervious
All buildings must be protected from the influence of external
water sources. A breathable plaster and paint system, that will not
restrict the “breathing” characteristics of CELCRETE,