Humidity created in living and working areas
seeks to escape into the atmosphere.
This process should not take place via the
window connection joint but via regulated
air exchange. Professional sealing of joints
 
is indispensable. Hanno’s principle is also
shared by RAL: „tighter inside than out“.
Hanno products can be intelligently
combined to meet specific requirements to
create optimal weather protection, best
   
possible thermal and sound proofing and
full separation of interior and external
climates be ensuring a vapour gradient

from the inside to the outside.