Lumi Seamless Windows

If you are looking for a contemporary appearance for your home, the Lumi range is the perfect fit, with minimalist wall-to-wall glass that brings a new level of brightness to every aspect of your home.

Lumi is a groundbreaking range of customisable, matching frameless windows from Apeer. With a completely flat, uninterrupted profile, these radically styled windows bring a wall of light to your home.

Hidden under the ceramic colour lies the secret to Lumi’s strength – energy efficient triple glazing that has been structurally bonded to an internal core of high strength, glass-fibre reinforced profiles.

This intelligent engineering is the first of its kind to the market, bringing all the design benefits of frameless glazing with all the strength, security and internal styling of more traditional windows for your home.

External Frame Colours

A subtle band of ceramic colour has been fused at extremely high temperatures to the glass inside the glazing unit.

Available in six different finishes, all colours are protected from the elements reducing the possibility of fading over time.

Plus, no external frames mean that maintenance and cleaning are every bit as minimal as the styling.

Internal Colours

Lumi is one of the only wood or PVC alternatives with an interior finish that can be matched across the trims, window boards and sills of all the windows in your home.

Available in a choice of eleven styles, four of which are convincing and subtle wood grain finishes, Lumi is the simple way to upgrade your home interiors.

Energy Efficient

Lumi glazing units have been designed to conserve energy and withstand even the most extremes of weather. The edge to edge design with no vertical or horizontal frame allows more light in. Argon-filled, low E-glass and super-tight double gasket seals let less heat out with double and triple glazing options with a WER rating of ‘A’ with a U value between 0.8 and 1.2.

With a state of the art 50mm insulated triple glazed unit, an 80mm draught free double rebate system with a double gasket seal as standard, Lumi windows are among the most energy efficient on the market.


Top of the range glazing requires top of the range security, which is why these windows us the Lumi brake lock system from Winkhaus, which allows the window to be locked into any opening position simply by using the window’s handle, exclusive to Lumi windows in the UK.
Lumi Windows double and triple glazing

Lumi Window Configurations

Lumi glazing can be configured to your requirements with fixed an opening units to suit your needs.

Lumi window configurations

Lift and Slide Doors

The highly thermally insulated aluminium lift-and-slide Lumi Slider with its perfect water-tightness, excellent sound reduction and burglar resistance up to RC2 (WK2) is second to none.

The modular profile insulation achieves U-values of 1.1 W/(m2K). With large opening widths and easy operation, Lumi Slider offers new system solutions for large projects and luxury homes.


Lumi lift and slide doors

Lumi Bi-Fold Doors

Lumi bi-folding doors might look like and behave like Lumi windows and doors, but they work slightly differently.

Their 62mm triple glazed insulated glass unit is structurally bonded to a twin seal thermally broken aluminium frame with insulating foam inserts. However, they are one of the most energy efficient bi-folds on the market with excellent U-values. And they have achieved burglar resistance of WK/RC (DIN EN 1627) with Schüco multi-point lock system with shoot bolts.

Lumi bi-fold doors


All our windows, doors and conservatories come with a guarantee of ten years. This is backed up with an Insurance-Backed Gurantee offering you complete peace of mind.

LUMI Windows Brochure

Lumi Window Range Guide 2023

Lumi Windows

A range of customisable, matching frameless windows with a completely flat, uninterrupted profile.

Making Houses More Homely

We take pride in making your house more homely and have worked for generations of families in North Hampshire, Berkshire and Surrey.

Enquiry Form

If you have an enquiry, why not get in touch and one of the team will get back to you.