Lumi Glass-Fibre Windows

Lumi logo, doors, windows and bifolds from WindowWise Trade

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Lumi glass-fibre windows is a groundbreaking new range of customisable, frameless triple glazed windows. With their completely flat, uninterrupted profile these radically styled windows bring a wall of light to your home.


A triple glazed unit bonded to an internal core of high strength, fibreglass profile.

External Finishing

A band of ceramic colour has been fused at 700 degrees to the glass inside the glazing unit. Available in eight different colours, fully protected from the elements.

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Improved energy efficiency using an 80mm fibreglass, double rebate system with an insulated core which can achieve an overall heat insulation value of up to Uw=0.7 W/(m2k) on fixed casements. By using premium materials the Lumi glass-fibre windows range reduces energy consumption and heating costs.

Lumi is currently the only window, door and bi-fold system on the market that offers a complete matching suite of products. External finishing comes in a choice of 8 standard ceramic border colours with a variety of clear and obscure glazing options. There are 8 internal colour options including 4 woodgrain Renolit finishes new to the market.

Both the frame and sash corners are mechanically reinforced with metal cleats and chemically bonded with structural adhesive. This ensures a long service life with very low expansions and a smooth operation.

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All Lumi glass-fibre windows products are fitted with a high security multi-cam lock system. All the glass is kitemarked.

With no external framing around the wall-to-wall glass Lumi glass-fibre windows is simple and easy to clean and maintain.

Concealed hinges will allow Lumi to work smoothly for many years.

Profile system

  • 80mm frame depth.
  • Double seal gaskets.
  • GRP (Glass Reinforced Plastic) frame and sash reinforced with aluminium corner cleats and structural adhesive.

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Thermal insulation

  • Thermal transmission coefficient window up to Uw=0.7 W/(m2k)
  • Thermal transfer coefficient of glazing up to Ug=0.6 W/(m2k)


  • High security Winkhaus lock system.
  • Kitemarked glass.
  • 130kg hinges as standard.

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