Double Glazed Units
  • Double Glazed Units manufactured to EN1279-2.
  • Float and Toughened Units manufactured within 3 Days from point of order.
  • Aluminium Spacer Bar in Natural Silver or Bronze Anodised as standard.
  • Available in 6, 8, 10, 12, 14, 16 , 18 & 20mm Pilkington K Glass & EnergiKare Units.
  • With 16mm or 20mm Air Space to meet Document L Requirements.
  • Swiss Warmedge Spacer Bar.
  • Energy saving technology making windows warmer and helps in noise reduction.
    We manufacture Units using Swiss Spacer, to comply with new Window Energy Ratings for our own windows.
  • Decorative Leaded & Georgian Designs.
  • Standard Rectangle or Diamond Leaded designs on Single or Double Glazed Units or your own design including the use of colour film.
  • Georgian Designs available in White or Woodgrain finishes.
  • Bevelled designs manufactured to give that extra special effect.
  • Pilkington EnergiKare Units.
  • These units are now manufactured to help achieve Window Energy Ratings, please phone Garry to discuss your requirements or visit for further information.
  • Planitherm Glass Units
  • Planitherm Total + Glass Units are manufactured to further improve thermal performance and achieve “A” or “B” Rated windows or where compliance is via U value method.
  • St Johns Window Centre manufactures Planitherm One and Planitherm 4S units for specific projects.
  • Glass Cut To Size.
  • Clear Float and Obscure cut to size, whilst you wait. Laminated and Wired glass also stocked.

For more information on glass and double glazed units see our sister company website


St Johns Window Centre have manufactured Double Glazed Units using this glass for many years
St Johns Window Centre manufacture a wide range of Double Glazed Units incorporating Planitherm Glass
St Johns Window Centre is proud to be a Planitherm Network member