Solarlux Bifolding Doors Review

Photo of author

Nick Dardalis

Updated on

In our Solarlux bifolding doors review, we look at what makes these German-made premium products , so desirable. As well as aluminium, Solarlux products come in wood as well as a combination of wood inside and aluminium outside. We specifically focus on the aluminium versions in this review; the SL82, Highline and Ecoline.

Solarlux bifolding door
solarlux bifolding doors2

There's a reason the Solarlux bifolding door is the best. Beautiful to look at, flawlessly built, slim sightlines, phenomenally well-engineered and with features you won't find on other bifolds. It's truly worth the money.

Editor's Rating:


  • Outstanding looks, design and quality
  • Multiple threshold options
  • 99mm sightline
  • Slides and folds effortlessly


  • The longer delivery times
  • Pricier than other bifolds, but worth it

Solarlux Bifolding Doors Review. General Information

solarlux bifolding doors review

Every product made by Solarlux offers products with excellent design, engineering and high specifications.

The bifolding door range comprises 11 different models. The aluminium versions also include the SL35 and SL45, non-insulated models designed to close off patio areas, and swimming pools or create internal partitions. Bear in mind, these do not meet current Building Regulations. For the purposes of this Solarlux bifolding doors review, we have concentrated on the Ecoline model.

Solarlux products are not the cheapest on the market, but you will find a quality, design and overall functionality demonstrating the higher price. These upper-tier aluminium doors we think are good value when you look at what they give you. We delve into these many features in this in-depth Solarlux bifolding doors review.

Solarlux mentions architects like Foster and Partners using their products. Established and expert home improvement companies also choose Solarlux as their luxury offering. Some of the best installations on television or award-winning projects often feature Solarlux products. More recently, there’s the new Solarlux Megaline, which goes beyond what is possible with bifold door sizes.

Solarlux manufacturing and installation quality.

Solarlux designs and manufactures their products. It’s their system, their design and nobody else makes it. For the homeowner, it’s another clue to what goes into Solarlux doors. Every door is made in Melle, Germany.

The same benefits of sole manufacturers apply to Solarlux. Consistent quality, the same manufacturing processes and no variation from one factory to another. This can be an issue with other manufacturers buying bars of aluminium and accessories from aluminium systems companies. Doors are certified and tested to the security and weather performance standards. The powder-coated or anodised colours are professionally applied by certified applicators. CE Marking and extensive cycle testing also feature prominently. With cycle testing of more than 20000 cycles, using the door a few times a week gives a lifespan of over thirty years.

A bifolding door is only as good as its installation. In the UK, you deal either directly with Solarlux or their network of trained ‘Solarlux Quality Partners’. We tell you more about these later in this Solarlux bifolding doors review.

Aesthetically the doors offer flat profiles, elegant and modern handles and are definitely contemporary-looking bifolds overall.

solarlux bifolding doors review

Solarlux bifolding doors review – Ecoline vs Highline.

The two main products you’ll come across researching Solarlux bifolding doors are Ecoline and Highline. For most projects, Ecoline is ideal. These two products are very similar in look, performance, handles and general components. They’re excellent doors.

The Solarlux Highline bifolding door differs in having a slightly deeper front to back dimensions. Therefore you get four features you don’t get with the Ecoline.

  • A triple glazed option
  • Better U-Values
  • Improved sound insulation should you want it
  • Larger door panel sizes.

Sightlines are the same as is the same smooth and light slide and fold action.

All glass SL82 by Solarlux

The latest Solarlux SL82 is award-winning and features from an all-glass appearance when viewed from the outside. Few bifolds on the market offer the flush glass design. One product that’s similar is the GG65 by Folding Sliding Door Company. However, you’re not really comparing like-for-like.

The SL82 uses a bonded glass design with the front pane of glass stepped past the inside pane. Glass overlaps the minimalist aluminium profile. Essentially, a layered glass design giving an edge-to-edge, all-glass look. Even better with this door is the 8mm visible aluminium surrounding the glass. Not only does this protect the glass edge but also creates a very pretty picture-frame surround. It’s worth seeing this door for its impressive appearance.

Complete with recessed floor track for barrier-free living, integrated SL lock plus the freedom to open/close glass panes from outside and you have a superior bi-folding system.

Solarlux Bifolding Doors Review – Comparing with other Solarlux models

Summarising the differences between the three products is our at-a-glance table.

Door Panel Sightline99mm99mm104mm
Maximum Panel Sizes1x3m1.1×3.5m1×2.5m
Low Threshold OptionYesYesYes
Best U-Value1.1@m2K0.8Wm2K1.2Wm2K
Frame Depth67mm84mm80mm
Glass thicknessup to 36mmup to 60mm30-38mm
Standard Colours303030

What makes Solarlux bifolding doors different?

A consistent message across our website and the Solarlux bifolding doors review and others you read is that there is no bad bifolding door on the market. However, where they differ is who makes them, the overall supply chain and the correct installation. Any folding sliding door comes designed for reliability, and most meet security and weather performance standards. You also get similar specifications on the aluminium profiles, paint finish, glass and components.

So what makes these doors different? The answer lies in the things you won’t see on brands such as Aluk, Smart Systems, Origin, Reynaers and even Schuco. It is the finishing touches and engineering. The perception that German cars are better engineered also applies to a German door. Here is what you get with Solarlux.

TwinX Centre Panel Mechanism

An ingenious centre panel centering mechanism keeps the panels consistently aligned.

At the same time, TwinX (pronouned Twin – X) keeps the doors stable when closed and helps retain the alignment of the door joints.

So good is this design, it even does away with a middle hinge. As a result, Solarlux bifolds up to a certain size only need two hinges where most other bifolds at standard sizes need three. Neater, better and less visible hinges make for a more attractive door set.

Notice also how tight the doors stack together. Only a few systems come together this well fully open.

stacked doors

The other advantage to the TwinX is keeping the door seals continuous and not interrupting and cutting them to suit at the middle hinge.

Innovative door panel catches

Probably the best bifold door catch on the market. Only the Schuco door offers anywhere near this level of controlling the stacked bifolds in the open position.

Magnets work fine, but being able to hold the door in some way has far more benefits.

solarlux door catch

Solarlux calls these Comfort Snap Panel Catches. Different from the magnets you see on virtually every other mainstream door, Solarlux uses an entirely different design for the catches holding the panels together.

They come designed for convenience, ensure the doors engage sequentially and just works better than magnets found on most other bifolds.

German engineering and attention to detail

The quality of the metals used in the door handles is excellent. Weighty, tactile and robust too. They’ve a luxurious satin stainless steel finish and really set the door off perfectly.

The intermediate handles used to pull the doors have a reassuring sprung action to them with a soft and slow return to normal position.

And, as you’d expect from German attention to detail, there’s a small black stop on the handle bottom. It’s designed to stop the metal to paint contact and protect the powder-coated surface finish.

Solarlux doors are all about attention to detail.

solarlux door bifold handle

An always clean door threshold

Look at most other bifolding door brands and you get the rollers either on or set within the threshold. Cleaning the threshold is rarely cited as factor when living with bifolds day-to-day. That said, Solarlux doors come with a clip-on section designed to make the threshold look better as well as protecting from dirt getting into the track.

Whether this feature is important is subjective. What it does highlight, however, is attention to detail with thoughtful engineering.

Hinges allowing easy cleaning of the doors

A removable hinge pin splits the door hinges in two. Then the door panels turn inwards letting you clean the inside and outside glass panels. This facility also lets you clean the door aluminium edges better too.

This is a great feature especially useful on high-level doors. Furthermore, the hinge is highly engineered meaning the hinge pin doesn’t drop out or get lost. The Solarlux video does a great job of showing some of its many features.

YouTube video

Between the door panels, you’ll find what also look like miniature hinges. These, Solarlux call “TWINX”. Discreet and nice to look at, these make the slim design possible by interlocking together. The benefit is better door sealing and the door seals run continuously. The door seals are another element to study if you get to see these doors. In our view, they are the best looking, neatest seals we’ve seen on any product.

Multiple low threshold options

While any well-designed bifold facilitates a low threshold, Solarlux offers more than just a standard or low option. Schuco and Reynaers bifolds offer several low threshold solutions for bifolding doors. Solarlux goes even further.

The bionicTURTLE®

The bionicTURTLE® name refers to the thermal break insulating the profiles. However, this is more than just regular polyamide.

Centrally located, bionicTURTLE® offers several benefits. One is the strength it offers to the aluminium profiles. The other is the thermal break, helping to give the product its excellent U-Values. The third is its role in providing locking points for the hardware.

An adjustable frame

While you won’t see the benefit of an adjustable frame as a homeowner, you certainly will as an installer.

Cleverly designed, the adjustable frame is different from how Schuco and other brands compensate for tolerances and adjustments when fitting bifolding doors.

Door adjustment happens in the subframe. This means only one adjustment point rather than having to work with every door panel. Another benefit is consistent sealing across the entire door set. The door also looks much neater at the frame jamb compared with other adjustable jamb bifold doors.

solarlux bifolding doors review
Solarlux bifolding doors are eve available in a steel-look design

About the Solarlux Quality Partner

Our Solarlux bifolding doors review also needs to mention some exclusivity behind the product. That said, locating a dealer isn’t difficult, but fewer than stockists of brands like Origin, Reynaers or Schuco. Like Sunflex, Solarlux takes care in choosing its partners. We understand they fall into two categories. One is a Dealer, and the other is a Quality Partner.

The Dealer is an arrangement where a reputable window company can sell and install Solarlux products. Quality Partners need more product knowledge, an exceptional showroom, more product training and the ability to finance, manage and execute more demanding installations. Importantly for the homeowner, in the event of a Quality Partner going out of business, Solarlux steps in. They’re not alone in doing this as Origin has also done the same although it’s rare.

Therefore, while every Dealer or Partner of top brands is an independent business, they nonetheless must meet the criteria set down by the systems company. After all, it’s their reputation at stake.

A look on the Solarlux website shows just six Solarlux Quality partners in the UK.

Solarlux bifold doors review – other bifolds to consider

We’ve consistently said there’s no bad bifolding door on the market. However, if pushed, Solarlux and Centor we would say are above all others, the very best you can buy. In the same way people choose brands for clothing, luxury goods or home appliances. Solarlux and Centor are certainly luxury glazing systems.

Furthermore, it’s always good to compare brands. Besides the usual brands like Origin, Aluk or Smart Systems, there are only three comparable models with a Solarlux bifolding door, even though none are the same. Moreover, whilst all bifolds, well-made and properly fitted will serve you well, our three other comparable brands to compare with Solarlux come with their own individual design features, similar slim sightlines and overall better engineering. The other reason we’ve chosen these is, like Solarlux, they’re only made in one factory, not by many different fabricators. Finally, they’re all available through a dealer network of some of the best window companies as well as aluminium specialists.

Centor Bifolding Doors

Of all the bifolding doors on the market, Centor is a favourite and you can find out why. The attention to detail on a Centor product is outstanding. From the different way it’s made, door edge finishing detail, the luxury handles, to the advanced seals, easy-clean thresholds and flyscreen systems. Centor seems to have it all.

They are by no means the slimmest bifolds on the market. However, for sheer quality, these are certainly comparable with Solarlux but go even further. We’ve seen just about every major bifold brand there is. Few compare to Centor.

Sunflex Bifolding Doors

Also made in Germany, Sunflex is probably a direct competitor to Sunfold. They offer the same combination of aluminium and hybrid products and have similar aesthetics. We really like Sunflex bifolding doors for the way they look, the impeccable slide and fold action and the same large door sizes.

Duteman FD85 or Alumil SF85

The Dutemann FD85 is another outstanding bifolding door from one of the UK’s best manufacturers as well as one of the largest Schuco fabricators in the UK. It is an excellent bifold and worthy of consideration. You won’t get the unique Solarlux features but you will get a unique name in folding sliding doors. Bold hardware details, modern design and the impressive 1.5m wide door panels are just some of it’s great features.

As an illustration, Express Bifolds, one of the best home improvement businesses in the UK also use this Alumil System and have it in their product range as the XP Vision.

Do check out the Dutemann FD85 and compare with this Solarlux bifolding doors review.

Solarlux Bifolding Doors Review. Conclusion

Both Solarlux Ecoline or Highline products are desirable, luxurious and technically advanced. Moreover, with excellent thermal insulation, impeccable attention to detail and a prestige name, as a homeowner, you really are putting one of the very best door brands in your home. As an installer, selling Solarlux is one way of demonstrating reputation, service and trust.

We’ve not mentioned much about colours and options in this review as there are numerous. Solarlux goes beyond regular RAL/Interpon powders offering all manner of colours and finishes. Security is excellent, performance is top-notch and reliability is guaranteed when properly fitted.

Finally, the only way to appreciate why Solarlux doors look, feel and genuinely are different is to see one. Study the detail and when you open, close and fold a Solarlux door, you’ll understand why these doors more than justify their higher price.

Providing expert help to homeowners and trade professionals since 2010




Get Free help finding the right products from the best suppliers

16:42 30 Oct 23
Nick responded incredibly quickly to my enquiry (on a Saturday too!), and was able to offer invaluable advice on both aluminum systems and manufacturer / suppliers. Thanks Nick!
chris steerchris steer
16:18 09 Oct 23
Had a meeting with Nick during the grand designs show. Was extremely helpful and professional would highly recommend
Chris WesthorpChris Westhorp
19:55 13 Sep 23
Extremely helpful with pointing us in the right direction to find the products we required and suggesting firms that could reliably fit them.Nick was quick to reply and very detailed in his advice.Highly recommend reaching out to them.
Cathy GreenwoodCathy Greenwood
07:03 11 Sep 23
Update - A second email to nick for help on bifolds resulted in a detailed informative reply even on a Sunday ! This guy is so knowledgable and helpful .I approached Nick for an independent view on sliding doors v bifold and the different brand options . His reply was extremely detailed and prompt and allowed me to navigate this often confusing world in a much more informed way . Thanks so much Nick
Anthony CraigAnthony Craig
12:45 05 Sep 23
This is a must site for anyone looking for advice. Great service and very quick answers to questions. Nick has been of great help quiding us through the maze of aluminium products. Thank you
Philip DuffieldPhilip Duffield
20:24 26 Jul 23
I contacted Nick @ ATS for guidance on what aluminium sliding door systems would be suitable for an opening in an extension that is going to be both wide and tall. He came back really quickly with very detailed and incredibly helpful advice. He is clearly extremely knowledgeable about the systems on the market and their respective features and capabilities. If you’re feeling a bit lost by the overwhelming range of choices out there, I’d definitely recommend contacting him.
Dariush HekmatDariush Hekmat
17:25 19 Jul 23
Nick's advice is great. He is always quick to respond and spends time on responses, which really help to make an informed decision.
Alan FosterAlan Foster
07:51 12 Jul 23
Absolutely fantastic. Asked for advice about replacing Crittall (?) windows late last night and early this morning received 3 great suggestions and contact information for suppliers
Rachel LauRachel Lau
09:24 16 Jun 23
Fantastic website full of valuable and pragmatic advice about product selection and comparison: no other website gives information like this. Truly written for public interest. Don't hesistate to reach out to Nick via the mailing system. He responds very quickly, is friendly, and has very sound and high knowledgable advice. I have already shared this with my friend planning her own grand design.
guard Charlieguard Charlie
12:28 14 May 23
I emailed this company just on the off chance they could help me with new magnetic sliders for my patio door. They were not able to supply those but were so very helpful providing me with the name of a company who could. I am so very grateful at the great service. Dare say customers must be very happy. thank you so much.
Benjamin LewisBenjamin Lewis
10:06 04 May 23
Nick is very helpful indeed. Extremely knowledgeable on bifolds which was in relation to my query. Great website as well, some very useful articles. Particularly appreciated the article that lists all the major bifold options in order of their sightlines! Thank you!
P JonesP Jones
08:07 15 Apr 23
I asked Nick some questions about an installation we were considering and he replied within hours with some very useful suggestions that will probably lead us to using a different make and supplier. Thanks, Nick. Great work.
Nicholas WallNicholas Wall
13:18 02 Apr 23
Looking for fair and honest expert advice on all aspect of aluminium windows and doors? These guys will arm you with all the information you need to make the RIGHT choice in a highly complex, crowded marketplace. post a question and you will get a very quick professional answer you can rely on being based on fact. Thanks guys!
Giorgia SiriacoGiorgia Siriaco
16:25 21 Mar 23
After a lot of research to find doors that would meet our unusual size requirements and feeling increasingly uncertain about the best way to spend our small budget, I stumbled on the ATS website, and I'm so glad I did! I contacted ATS to request advice and Nick promptly replied with a wealth of information, providing us with options and relevant contact details. I only wish I'd found them sooner!
Carol NortonCarol Norton
10:01 17 Mar 23
I've been so confused about how to achieve the look I'm after, and going round in circles with various window/door companies, trying to get away from the huge chunks of plastic currently around my windows. I didn't expect an email to a company found through a Google search to really help - but I was desperate, so I tried. I'm SO glad I did. Finally I have clear explanations from ATS of where I've been going wrong, exactly what I'm looking for, and a list of local companies that might be able to provide it! The response has excelled my expectations and I feel as if I'm finally inching closer to a home with which I'll be happy and comfortable: thank you.
David NunnDavid Nunn
20:54 14 Mar 23
It is rare that I write reviews, however after my very positive communication with Nick - enquiring about suitable slim sash aluminium windows for my project, I felt that a review was definitely warranted. I can reinforce the many positive reviews posted so far, Nick was very quick to respond, providing comprehensive detail, with excellent independent advice.In summary, great service, thank you Nick.
Chantal AuerbachChantal Auerbach
13:04 09 Mar 23
Nick from Aluminium Trade Supply was incredibly helpful informative and pleasant to deal with. He responded quickly to emails and was very knowledgeable. Highly recommend being in touch with Nick if you are considering new aluminium windows or doors.
Lee JonesLee Jones
20:21 22 Feb 23
I dropped Nick at Aluminium Trade Supply an email re high security slim sightline bi-folds and their alternatives and he responded that quickly (and so comprehensively) that I felt bad I’d not paid him for his time!Nick Sir your product knowledge is outstanding and you are providing a level of service that goes wayyyy above and beyond expectations. I’ll definitely make sure I mention Aluminium Trade Supply to anyone I encounter looking for a fenestration solution 🙏🏼
15:13 13 Feb 23
We are looking to replace some old UPVC patios doors with aluminium ones. The ATS website is a great source of advice in an area where clear information is sorely lacking. Having used the website, I then followed this up with a number of specific questions relating to our search, and Nick came back very quickly with clear, detailed and very useful advice.I have been very impressed with both the website and with Nick's advice. My only regret is that I didn't come across ATS before replacing various windows in 2021 - I'm sure it would have saved me a lot of grief and money! Thanks again Nick.
Azza McCabeAzza McCabe
17:47 01 Feb 23
So impressed with this company.Responded to my query quickly andgave valuable advice. Nick was extremely helpful and we were able to move forward with our project.
Adri LoloçiAdri Loloçi
11:21 08 Jan 23
Nick was super fast to respond and provided some great recommendations. I would recommend this website to anyone looking to find bifold or sliding aluminium doors.
Stephen HoustonStephen Houston
16:16 03 Jan 23
Looking for aluminium crittall style internal door and external patio French doors. Noted good reviews and thought would ask for advice. Comprehensive reply with excellent independent advice and lists of fitters who could provide products and installation. Great service.
Inga GeachInga Geach
08:25 21 Dec 22
Nick from Aluminium Trade Supply has been extremely helpful with navigating the jungle that is aluminium glazing for our upcoming extension project. His advice was prompt, detailed and always impartial. Very grateful for your input, thanks Nick!
Amanda BurtonAmanda Burton
10:54 16 Dec 22
Brilliant website and an excellent service. Nick provided not only detailed advice and supplier contacts, but highlighted the considerations of various products so I could make an informed choice. Our Sunvista minimal sliders were fitted this week and I couldn't be happier, stunning. Thanks once again for your advice and recommendations, invaluable!
Keith BarnesKeith Barnes
17:18 10 Dec 22
Very helpful advice given to my question, including the name of 3 different companies that i could try for the product being enquired about. Many thanks
Munim ChowdhuryMunim Chowdhury
11:45 13 Sep 22
Nick has been very helpful on signposting me to a number of partner organisations for steel/aluminium doors.
SUSAN wallaceSUSAN wallace
17:26 31 Aug 22
My experience with this firm was exceptionally good and this is notalways the case as a female, dipping a toe into technical waters.I was spoken too with courtesy and at a level that helped me consolidate what was needed .On top of that I was given a list of companies and places where I could obtain the type of product I needed.I could not thank them enough and would certainly go there again and reccommend others do too.
Paul SalterPaul Salter
22:39 22 Aug 22
Contacting Aluminium Trade Supply is like contacting the Oracle direct. Advice is always comprehensive and balanced. On multiple occasions they have provided me with options that fully meet our objectives. Many thanks.
Nick McCormackNick McCormack
20:25 14 Aug 22
Really helpful and useful came back to me on a Sunday with some invaluable information. Highly recommended.
ray addisonray addison
13:14 14 Aug 22
received a prompt reply to my query,and helpful information from ATS