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Garden extension with sliding doors and casement windows as seen from the garden

Perfect large pane sliding doors for modern extension

SL700 sliding doors and SL68 windows for contemporary design

Glass extension for modern indoor-outdoor lifestyle

The modern extension for this detached home in Berkshire delivers new light and open living spaces. Its owners now enjoy a dining area, bespoke kitchen with breakfast bar and informal seating, all with uninterrupted sightlines to the garden.

The glazed extension, supported by a steel frame that’s neatly concealed by aluminium pressings, is the perfect design solution for an indoor-outdoor lifestyle.  

Sets of two and three panel floor-to-ceiling SL700 sliding glass doors with heights of 2477mm and visible frames of only 25mm wrap around this new space, providing in total over 15 metres of glass to maximise light and views. 

Insulated sliding doors essential for large extension

Our homeowners chose the ODC SL700 sliding system for its large pane size (up to 4 metres by 4 metres) and ultra-slim frames, but it also has energy-saving features which give their single story extension a high degree of insulation, weather resistance and acoustic protection. 

Each set of doors opens effortlessly on stainless steel low-noise tracks despite each panel weighing up to 350 kgs. Handles are discreetly integral to the frame, a SL700 design feature our clients particularly liked.

The extension’s flat roof has a large central frameless glass rooflight over 4 metres in length. It’s positioned to flood the kitchen island and breakfast bar below with natural light, even on a rainy autumn day.

A fifth set of sliding doors opens up the home’s original living room to garden views all year round; SL320 doors were specified to suit its smaller dimensions.

Aluminium windows and front door to match

SL68 slimline aluminium windows finished in Anthracite Grey inside and out provide a complete glazing solution for this project; these are ODC custom-made casement windows with the same high degree of performance for bedrooms and bathrooms. 

An ODC front door provides matching design, robust security features and excellent thermal performance.  Like our sliding doors and the front entrance fixed windows, the door was made to measure at our Poole factory

Compare the energy performance of the six different sliding systems we offer, and yes there are six!

Project Type:

Garden rear extension


ODC SL700 sliding doors, ODC SL320 sliding doors, ODC SL68 slimline windows, ODC Front door with Santa Ana panel. ODC121 single glazed door



Glazing Highlights:

A complete matching glazing solution – ODC doors, windows and front door harmonise the original house with its contemporary extension

Rear extension Fly-through video

Our customers explain how they found the best sliding doors for their project

“We liked the size of the SL700 particularly because we were looking to increase the door height as well as the width. The 700 handles were minimal and didn’t overpower in any way and that appealed to us.”

Aluminium windows and front door for home renovation

A complete glazing package

You can order a complete aluminium window system for your new build or development project – all under one roof. At ODC Glass your choice is truly comprehensive – everything from the smallest fixed picture window to a new aluminium glazed front door – all with the same sightlines and finish. Read our short guide to complete glazing solutions.





Discover more about our large pane ultra-slim sliding doors for contemporary extensions


Visit one of our showrooms to explore the look and feel of ODC SL700 doors.


Download our brochure for more information on our architectural glazing solutions and services.