Water Tightness
   
 
COST SAVING ON HOUSE KEEPING
DUST PROOFING
The sealing in WINDOW WORLD Windows System is calibrated to achieve excellent air tightness of less than 0.1m3/hr/m2@10 pa (tested in accordance with GB/T7107-2002),This effectively stops dust drifting in from the outside, which drastically reduces the time you'll need to spend cleaning your home.
 
WATER TIGHTNESS
WINDOW WORLD windows incorporate an 8mm overlap between frame and sash, as well as dual compression gaskets, to prevent both penetration and water infiltration. They boast a proven water tightness of at least litres/min/m2 @700 pa (tested in accordance with GB/T7108-2002). So your home stays absolutely dry however heavily it might be raining outside.