Tired of dull, cluttered spaces that feel disconnected from the outside world?
Cortizo 4700 sliding 3 sash doors create a seamless connection with nature, flooding your space with natural light and creating a calming sense of openness.
Their minimal design and modern style will transform any room, while the slim central interlock and streamlined frame emphasise the sleek aesthetic.
If 2 sash isn’t the right size for you, we stock a range of Cortizo 4700 sliding door sizes, including:
Korniche updates offer slimmer sightlines with seamless vent integration, advanced security enhancements, and introduce stylish, updated hardware options, all while retaining the features that made the 4700 a market favourite.
10-year warranty
Moreover, Korniche provides premium aftercare and includes a gold-standard 10-year warranty for added peace of mind.
Choose Toughened Glass Systems for your glass door and rooflight products
As a leading name in the industry, we’ve spent years providing high-quality glass features at fantastic prices.
All our products are beautifully made and durable, promising a stunning aesthetic and reliable performance for years to come.
Contact us today if you have any questions, and view our wider range of glass rooflight products below:
The key measurement to focus on is the exact size of your structural opening.
For the best fit, the opening should be 5mm larger on all sides than the sliding door size you are ordering.
For example, if you order a door that’s 2100mm(h) by 4000mm(w), your structural opening should be 2110mm (h) by 4010mm (w) to ensure a smooth fit.
This slight difference allows the doors to be installed smoothly and securely.
Please be aware that we do not supply fully flush-fitting doors (flush on both sides) as they do not provide a weather rating. The final finish is up to the builder, but in most cases, the interior side will be built up flush. However, the exterior must allow for proper water drainage. While the builder may install a flush drainage system, there must always be a slight step from the outside to the inside.
We advise each project has its own specifications. If this is a new build, then laminate glass is required to comply with document “L”. There may also be a requirement for trickle vents to be incorporated into your project. We advise checking this before purchase as all orders are made to order and sizes/specifications cannot be changed once manufacturing commences. Please note orders for triple glazed glass are not available on the website, please contact us if you require triple glazed glass.
Glazing : 28mm double standard or 36mm triple glazed units available upon request
Glazing upgrade- Laminated glass options available
Max frame width : 6400mm
Max frame height* : 2578mm
Max sash height : 2500mm
Max sash width 2500mm
Max glass unit weight: 250Kg
FOR 2 SASH CONFIGURATION
At 2100mm height min width 1500mm, max width 5092mm
At 2300mm height min width 1500, max width 4960mm
FOR 3 SASH CONFIGURATION
At 2100mm height– min width 2210mm max width 6400mm
At 2300mm height– min width 2210mm max width 6400mm
FOR 4 SASH CONFIGURATION
At 2100mm height – min width 2928mm max width 6400mm
At 2300mm height– min width 2928mm max width 6400mm
FOR 6 SASH CONFIGURATION
At 2100mm height– min width 4364mm max width 6400mm
At 2300mm height– min width 4364mm max width 6400mm
Glazing:
28mm Double Glaze
TOUGHENED UNITS
4mm – 20mm Spacer – 4mm inner Max 2.5m2
6mm – 16mm Spacer – 6mm inner Max 4.5m2
LAMINATED UNITS
4mm – 18mm Spacer – 6.8mm inner Max 2.5m2
6mm – 16mm Spacer – 6.8mm inner Max 4.5m2
Trickle vents
Option for 1 or 2 vents available online. (3 vents available upon request – priced on application.)
Vents supplied match profile colour
If trickle vents are selected then a head extender must be fitted to door. Default extender is 16mm but 38mm is also available
Extenders
You can select to add 1 no. extender to either top or sides of the door in either 16mm or 38mm. If vents are selected an extender is supplied. If extenders are required without vents please get in touch for a custom quote.
Cills
180mm cill for 2 track door (60mm projection)
250mm cill for 3 track door (60mm projection)
Note – You can choose face drained or concealed drainage when cill is added. Face drain is the only option with no Cill
Hardware Colours
Shoot bolt handles offered in White, Grey, Black Chrome and Brushed
Finger Pull handles offered in White, Grey, Black and Chrome.
The unique patented SpeedBead, a secret ingredient allowing our sliding patio doors to be glazed in seconds, along with a neat groove design allowing the seals to be hidden within the frame.
FAQs
How long is the warranty on the Cortizo doors?
The Cortizo 4700 Sliding Doors come with a 10-year manufacturer’s warranty, providing customers with complete peace of mind and confidence in their long-term quality and reliability.
How long is the delivery time?
The lead time for delivery is 2–3 working weeks. Within 48 working hours of order confirmation, you will receive a scheduled delivery week to help you plan your project efficiently. A confirmed delivery date will be provided during the week prior to your scheduled delivery window. Whether the door is assembled or in kit form, the glass will still be delivered with the door but not in the sash’s, it will need to be installed, once the door is fitted.
My property is a new build so does this comply?
We advise each project has its own specifications. If this is a new build, then laminate glass is required to comply with document “L”. There may also be a requirement for trickle vents to be incorporated into your project. We advise checking this before purchase.
Delivery
Lead time for this product is 2 to 3 working weeks. Please note labour would need to be on site to accept and off load the glass from the vehicle.
An initial week commencing delivery date is provided as production commences immediately to ensure efficient lead time. As the delivery week approaches a further confirmation message will follow advising of the booked delivery days itself for that week. WE STRONGLY ADVISE NOT CHANGING DELIVERY DATES AS THESE ARRIVE VIA THIRD PARTY TRANSPORT. PLEASE ALSO BE ADVISED AS THESE MADE TO ORDER CHANGES CANNOT BE MADE ONCE ORDERS ARE PLACED AS PRODUCTION LOG MEANS PRODUCTION COMMENCES.
We do not recommend arranging equipment and installation until the item has been delivered.
Please note delivery is FREE to most of the UK.
Deliveries cannot be facilitated to the following postcode locations:
Trustindex verifies that the original source of the review is Google.
Excellent swift service from initial enquiry to very quick delivery, made a fantastic addition to our refurbished kitchen in respect of light to dark area of the Kitchen
Steve Brown
2024-08-28
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I installed a 1400 x 1200 Flat Rooflight for a client and can thoroughly and totally recommend TGS.
First the ordering process was clear and simple. Then, as it was the first time I had used this product and my determination to understand the fitting process and to ensure a robust and leak free product, I contacted their technical section who couldn’t have been more helpful. Result was a perfect installation that looks pleasingly simple, stylish and floods the very contemporary extension with light. Thanks guys - I’ll certainly recommend and use you again.
Tracy Field
2024-08-28
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A great company to deal with. Totally professional and so helpful throughout.
I ordered a rooflight last year and ordered another one today!.
It looks perfect.
Can't recommend highly enough!
Magdaline Kumar
2024-08-26
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Great product. Helpful team on the phone. Received my purchase quickly.
WINA CONSULTING
2024-08-23
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Easy to deal with and efficient. Great service. Will definitely recommend
Ninian Gomez
2024-08-13
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Great product and great efficient service. Highly recommend them and happy to continue purchasing their products.
Williams Johnson Mota
2024-07-31
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I've used flat roof lights from Toughened Glass Systems in three residential projects and they've not only enhanced the visual appeal , light distribution and ambiance of our living rooms, but they've been holding on very well over time. The value for money and service provided by them has always been on point so I'm happy to recommend them.
Craig Towner
2024-07-30
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Great windows at great prices. Thank you
Kelly Harris
2024-07-23
Trustindex verifies that the original source of the review is Google.
This slight difference allows the doors to be installed smoothly and securely.
Note – You can choose face drained or concealed drainage when cill is added. Face drain is the only option with no Cill 
