• 1931

    Foundation

    Read more
  • 1946

    Portal construction

    Read more
  • 1963

    New material: UPVC

    Read more
  • 1977

    Sarleinsbach plant

    Read more
  • 1979

    Three panes, three gaskets

    Read more
  • 1979

    Coloured UPVC windows

    Read more
  • 1979

    Start of extrusion

    Read more
  • 1982

    Lannach plant

    Read more
  • 1984

    Start of production of insulating glass

    Read more
  • 1966

    First UPVC window production in Austria

    Read more
  • 1991

    Changeover from direct sales to specialist trade

    Read more
  • 1995

    Upgrade of the Sarleinsbach plant

    Read more
  • 1997

    Start of timber/aluminium window production

    Read more
  • 1997

    The third generation

    Read more
  • 2002

    Founding of IFN

    Read more
  • 2002

    Introduction of FIX-O-ROUND technology

    Read more
  • 2012

    Introduction of the revolutionary Internorm technologies

    Read more
  • 2012

    20 million windows and doors sold

    Read more
  • 2013

    HS 330 lift and slide door

    Read more
  • 2014

    HK 430 lift and slide door

    Read more
  • 2014

    I-tec SmartWindow

    Read more