Apeer Seamless windows | John Knight Glass

Seamless Windows

Lumi Seamless windows are a new range of modern frameless windows from Apeer. The minimalist styling of these seamless windows maximise the amount of light that can enter your home.

Seamless Windows

Product Details

Technical Details


  • State of the art 50mm insulated triple glazing.
  • Foam insulated frame for extra energy efficiency.
  • Triple gasket seal for excellent thermal performance and noise reduction.
  • Edgetech warm edge Super Spacer with built in energy saving.
  • Ceramic colour border. Fused in toughening furnace at 700°C.
  • 6mm Kitemarked low iron extra clear toughened glass.
  • Winkhaus high security lock with completely concealed hinges.
  • Multiple internal and external colours available.





Colour choice

3 external colours. 7 internal choices.
Lumi lets you mix and match the external
and internal colours.