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Our showpiece double glazed exterior frameless doors  come with expert-craftsmanship, engineering and the highest performance. We explain some of the technical characteristics of our doors.  This page is ideal if you want more information about profile sizes, glass and general performance.

If your project also involves an architect or builder, they may also find this section useful to understand the relationship between the doors and the building structure.

double glazed doors

Thermally Broken Frameless Double Glazed Doors

First of all, we are proud of the European Patent of our doors. (Patent Granted EP 2 456 942 B1 and covers all of Europe and the UK for our innovative glazing method, America and Australia.)

Furthermore, our premium grade aluminium extrusions with a durable powder coated finish offer you the best in contemporary sightlines but they also some with technical characteristics designed for security, weather performance and long-term reliability.

Technical Specification

Maximum Panel Heights  – up to 2.6m high, subject to overall product design. 

Specification of Bottom Track – (76mm x 58mm) 13mm gap which is thermally broken.

Specification of Top Track – (44mm x 61mm) Thermally broken and 4 x Weather Seals.

NEW & IMPROVED Profile Size – (70mm x 80mm) Inserts – 4 x Weather Seals.

Side Columns – 70mm x 58mm Deep with 4 x Weather Sealed Strips.

Glass – Standard Unit manufactured with 4mm/6mm Planitherm 4s soft coat and 4mm/6mm Toughened low iron. The toughened glass spacer which is 20mm x 12mm/15mm/18mm.  Glass is bevelled between the long edges of glass. Top and bottom have 2 rows of aluminium 20mm spacer bars filled with desiccant. Profiles are compressed onto glass and fixed with a polymer. The Glass U-Value is 1.0Wm2K with an overall U-Value including the frame of 1.4Wm2K

NEW & IMPROVED Bubble Gaskets – Available in grey

Head Deflection – 12mm Incorporated in Design Specification

Worldwide Patents – Applied for, granted and pending.

Design Specification

Our unique extrusions, side columns, tracks and profiles are all manufactured in the UK, as are our Frameless Doors. All units are manufactured to comply with BS6375 Part 1 2004.

The profiles on doors are connected to the tracks by means of a flag, including spacers which slide inside along the tracks. The tracks contain turning mechanisms which automatically tell us where the doors are to open. Doors can only be opened at gates, which are 13mm by 5mm, which makes them compliant to PAS24. The side columns expand by turning an internal handle, which in turn pushes the doors together to provide a weatherproof seal (wind and rain) BS6375 Part 1 2009.

How our doors work.

All doors slide on our purpose designed wheel system so the majority of the weight is at the bottom. Therefore, no additional reinforcing is required at the point of installation. Once the main working door is opened, the remaining doors then slide, stack and fold in the same location. As all doors are slim-line (45mm), they only take up a small amount of space. Our Frameless Doors can be stacked to either one or both sides of the opening, or a combination of the two. They can be opened inwards or outwards.

The door locking mechanism can only be accessed from the inside and uses a key situated within the handle for security purposes. There is no locking mechanism on the outside. When opening the main door, just turn the key and handle – the door will automatically spring back to allow you to open and close the door.

The framework is produced from powder-coated aluminium, manufactured in the UK and can be supplied in any RAL colour you specify.

Contact us for more information on our double glazed frameless doors.

We also offer a full range of aluminium windows, bifolding and sliding doors,
and front doors as FGC Bespoke Aluminium.

Visit the FGC Showroom

You can now visit our showroom in Strood, Kent.

The full range of Frameless products are on display in wide variety of configurations.

We request you contact us to make an appointment before visiting to avoid overcrowding.

Find out more about the FGC Kent showroom.

Reviews on Facebook and Google

FGC
Excellent
4.5
Based on 43 reviews
review us on
Our small job was handled extremely professionally from start to finish and we are very pleased with the results.
Very happy with the service I have received, everything went smoothly no issues, I was kept up to date throughout the process and the fitting team were very professional, polite and friendly I would recommend fgc to anyone thank you
Great product with diligent, professional staff from start to finish. Highly recommended.
Firstly I have to say a huge thank you to Paul the owner of FGC for being willing to take on the job of sorting out the extremely shoddy and poor installation of the Origin doors and windows fitted on my new build home, when it was built. And replacing the damaged gaskets. I had your guys with me for two days this week. What a breath of fresh air comparted to the people of originally installed my doors and windows. Extremely professional and lovely chaps. They worked tirelessly to sort out the many issues we had. Would absolutely recommend 100% THANK YOU !
Response from the owner: Good Morning Paul, Thank you for taking the time to share your positive experience with us. We are absolutely delighted to receive it and are pleased we were able to resolve the issues for you. It’s been a pleasure working with you. If you have any further need in the future, please do not hesitate to contact us.
Very helpful and good communication, great product. Thank you.
Very happy with doors. Look great. The installation was quick and straightforward.Will recommend
FGC were brilliant. Great advice on the best windows to get. Extremely good installation. Always ready to solve any installation or manufacturing issues. We are extremely happy with the end result!
Frameless windows were brilliant, Liam Alfie and James were great, polite, courteous, and left the site clean and tidy. The windows look amazing, Great service from start to finish. Many Thanks
We love these doors and look forward to having them open a bit more once the patio has ben completed. They really have a "wow" factor and this becomes a double "wow" when people are shown how the corner can be completely opened up. It was about a year from my first enquiry to the doors being installed as there was a considerable amount of building work required to prepare the room. throughout this period I remained in touch with FGC and the service was exceptional. The installation team was on site for a day, starting early and working through to completion before driving back to Kent!! We have been really pleased with the standard of workmanship and even had compliments from other tradesmen working on the room (most of whom had never seen doors like this). These are expensive doors but the price difference from a normal set of bi-folds was well worth it for the uninterrupted view you get. The doors were installed in February but I have held off doing the review until the room was more finished so I could post a more representative picture. Once the patio is done the look will be even better than we originally envisaged. I have attached a few pictures of the room (the white table is only a temporary measure while we wait for the new coffee table).
From first contact to installation, my interactions with FGC have been easy, fast and professional. The end product is superb, we are so happy with our new doors - wish we had done this years ago. Well done FGC!!
This is the second time we have installed FGC and we are very happy with our second installation- very sleek and stylish and all staff very helpful, thanks
Frameless Glass Curtains have few competitors so they could take a lax approach to their work. However, that is not the case. We have had a porch installed in a space that was not square or aligned. The service from survey to finish has been above standard. Barry’s attention to detail and determination that the work would not be complete until his high standards were met was much appreciated. The communication from the admin side was clear and helpful. So all in all we will be using Frameless Glass again and have no hesitation in recommending them.
Brilliant product, what a difference, no frames to block our view of the Brecon Beacons. The service has been the best I think I have ever received and the fitting team were faultless - they travelled 5 hours to get to us in Wales, arriving 30 minutes early, working flat out without a break for 9 hours before driving 5 hours back, all without one complaint!!
Ordered Crittal-style French doors in aluminium. The doors look fantastic and are so much better than the ancient sliding doors I had before. The company were very friendly and easy to deal with. They were understanding of my delays due to a flood. The installers were professional and polite and poor things had to work on the hottest day of the year. Would definitely recommend FGC.
Really great service from this family run company. We love the doors and the install was top notch. Thanks!
Great service and amazing finish! Would highly recommend!
Highly competent office and site staff, great product and at a fair price. Couldn't be happier with the entire experience and end result.
From the beginning to the end, everyone at FGC have been amazing. I knew straight away that the glazing FGC would provide and install would be spectacular and how right that was! The FGC glazing allows our Edwardian stained glass door to still be a main feature and in fact it shows it off perfectly. We are so happy with the end result and can’t praise FGC highly enough, somehow 5 stars doesn’t seem to be high enough.
Their windows are second to none. No other company in Germany, UK or anywhere else can produce such a fabulous product.Any issues that has come up, they always come & fix it. The staff are so nice and polite. For a small company they do really a great job over all. The main things are the frameless bifolds that you hardly have any frame in the line of vision and there is a 5 years guarantee. Mr & Mrs Jahedi
Delighted with our new frameless glass doors. Had lots of lovely comments, even all the trades who have been working on our house have said they've not seen anything like them. Great having something a little unusual. The quality of the doors is of a very high standard. The service from FGC has been very good too, from ordering through to installation. All went very smoothly with no problems. Paid a bit more than regular bifolds, but worth every penny. Best decision, no regrets at all.
Great service and very welcoming for my father and I. Adrian in particular was very efficient, gave great pertinent advice and guidance on my future purchase!
Excellent in all aspects from initial viewing in showroom to actual installation.
Excellent service and product from FGC.I have a glass-box conservatory, built with structural glass about 20 years ago. The 2 sliding doors needed replacing, along with 2 side panels, and I contacted dozens of companies selling conservatory doors and none of them were prepared to install their doors because of the perceived risks of working with structural glass.Then I found FGC who, with no fuss at all, carried out a survey, provided a very reasonable quote for the doors/panels and then installed the doors/panels on the agreed date.Communication with the FGC office was always quick and easy. The surveyor and installation team were efficient and courteous. The product works beautifully.We can now use our conservatory again. Thanks FGC.
Great company with excellent, friendly and responsive service, the guys were helpful and efficient with the installation and the slide and turn doors are a fantastic product.
Fantastic service from start to finish, from the surveying, contact with office to the workmen. I have experience through work of a number of companies providing similar products and these guys have been by far the best to deal with
FGC installed a two-panel frameless glass door at our property yesterday. Wow!! the installation is exactly as discussed, and was carried out by two of FGC's team members who were so professional and courteous. They were excellent, and we have no hesitation in recommending FGC and their team to anyone considering such an installation.We are delighted with the installation, and very pleased we chose FGC.Well done FGC!!
The quality of the windows / doors are second to none.The customer service was first class from placing the order to installation we were kept informed at every step.The installation team led by Richard left our house and patio cleaner than when they arrivedI would recommend FGC 100%Tony- Burnley
From start to finish everything was excellent.Fab u lasThank you
BRILLIANT SERVICE FROM START TO FINISHHighly recommended.
We purchased a beautiful Origin sliding door and side window from FGC. FGC installed the sliding door and window on time, however the sliding door did not fit correctly. Issues can happen. FGC made the process of re-surveying and re-installation very simple. FGC is a very pleasant and professional company to deal with. We are very happy with their service and would strongly recommend them.
I love my doors! It’s transformed my place. The people are great, no nonsense, organised and efficient. I’d recommend them to anyone
Excellent planning and product advice. All the staff were polite courteous and friendly.On the day of the installation, the team arrived bang on time -we live in Wales so a long drive from Kent! They had the job done by lunchtime (fitting a sliding patio door) and I have to say that on first impression of the unit, it looks and feels like solid quality.
We had a 5m stretch of these wonderful doors installed several years ago and have been very happy with the uninterrupted view of the garden that they allow from the living room. They are admired by every tradesman who sees them. A minor problem we experienced with water ingress last year was promptly and effectively resolved, and the doors were serviced for free at the same time.
Response from the owner: Hello Ian, thank you very much for leaving us a review and glad you're happy with your doors and our service.
Great staff and great products! Have visited the showroom to view doors, really loved all of them! Have referred to a friend - Can't recommend enough
Really great doors. Really are something different. Expensive, but you really pay for what you get here.
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What our customers say

The service I received from FGD was professional and prompt from the initial on site survey through to installation and completion. Added to this the finished product has exceeded my expectations. It has enhanced my home with style and individuality, and enabled me to make use of the space in a way that is ‘unique’.

Delighted with the windows – they make our kitchen so much lighter and are a joy to use. Two teething problems since installation have been dealt with promptly and efficiently by FGC at no charge. Definitely recommend them to

John Holland
Johnny

We have had these doors for several months now and are very pleased with them. Our initial contact with the company was very positive, the structure and operation of the doors clearly explained. The installation was carried out very efficiently with no disruption and the installers were friendly, their work clean and tidy. Our friends have admired these frameless glass curtains and we would happily recommend them to anyone who was interested.

What a great product and great company. Smooth process, professional services from surveyor to installation team, and everyone in betweeen. I could not recommend them high enough. Early days, but so far

Nigel Taylor
Nigel
We are very pleased by the results the only comment will be re protecting the work area to avoid dust or waste. As to how we were from initial contact (were we polite)? Yes great service and very responsive Arranging installation (were we on time and on schedule) Yes Were we clean and tidy? Not really as mention above And finally are you pleased with our doors (would you Recommend us)? Yes and Yes May

I am very happy with the doors – I saw them last night after work – though I didn’t open them as I wanted to make sure I followed the installers’ instructions not to. They look wonderful and my boyfriend and mum tell me they were absolutely lovely chaps. The finish seems brilliant and appears to be a huge improvement on the last installation. Ms Warren, London

Unit has been replaced thank you, once again I find FGC have responded to a problem with a no quibble replacement, it is good to know that there is still companies left who honour their guarantee in the proper manner and send installation teams that carry out their work in a professional manner with competence and courtesy, I would be quite willing to give any prospective customers a reference if that would be of interest

Mr D
Following the installation of our new FGC porch, I wanted to give a recommendation for the excellent and diligent service, and wonderful product we received from FGC. Numerous people have commented since we had the work done, and it has clearly added value – both visually and financially – to our property. Also, when the guys came to fit the product, it was noted that there was a slight flaw in one of the specially

Paul Jackson
Jackson

Hi Sara Just to day a big thank you for relating the doors the guys did a great job I had to leave them to it as I was in London Regards

Mellissa
Installation of four double-glazed doors, internal to a large bay window arrangement, top floor flat. Initial contact was by email and a quote came back within a couple of days. More than can be said for some of the other companies we contacted about similar products. We visited the factory for a demonstration and were also put in touch with a relatively local previous customer whom we went to see, to look at the product

Putting a frameless glass walls between our South facing lounge and dining room conservatories was one of the best things we have ever done in our house. When shut, they keep out the cold in winter and, most importantly, the heat on very hot summer days. When open during sunny winter days, the heat warms the whole house and reduces our heating bills significantly. FGC are a marvellous friendly company. Very efficient and a pleasure

Heather Glasgow
Heather
Couldn’t be happier with the product, it really has enhanced the vision that we had for our lounge and our garden. I was also so impressed with the manner and knowledge of your fitters who were not only very engaging but were also so knowledgeable and enthusiastic about the item they were installing. It clearly wasn’t just about a job, it just seemed to be about the ethos of the company, your management and the

Jon Roberts

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