What to look for when buying bifold doors

When it comes to buying bifold doors, most of the folding sliding door products on the market promise the essentials – security, good weather performance and fully opening up on warmer days to your patio or garden. In this guide to buying bifold doors, we explain some of the essentials but also help you with other aspects around folding sliding doors, helping you make a better buying decision, and getting a more superior product for your new extension or property renovation project.

advice buying bifold doors for a new extension

The advantages of higher quality bifolding doors explained

Any bifolding door provides a visually appealing patio door in your new extension or as a replacement for your dated patio doors. You’ll get a brighter room with excellent views out to your garden.

Open up your doors in the spring or summer and you’ll enjoy a seamless link from inside to out – an extension of your kitchen or living area. Even better with a bifold is their flexible configuration with your panels sliding in one or two directions.

A well-designed bifold can also come with a lower or flush threshold connecting your inner floors to your outside decking or slabs, but with full weather and water protection.

Configure your new bifolding doors correctly and you can also enjoy similar functionality to regular doors making quick garden access or ventilation easy, without having to fold the panels back every time.

The only disadvantage to bifolding doors is understanding the sheer choice when all materials and many brands seem to offer the same benefits. So let’s start giving you the tools you need to buy better doors without breaking the bank.

Why aluminium is best when buying bifold doors

Aluminium is by far the best material when buying bifolding doors. You’ll get similar security, weather protection and function with aluminium, PVCu or timber. However, compared with PVCu and timber doors, aluminium is always slimmer and provides larger glass sizes. The larger glass sizes matter a lot in your choice of bifolding door.

The larger glass sizes from slimmer bifolding doors give you more light, better views and a more pleasing outlook, especially when the doors are closed. And remember, our bifolding doors are closed most of the year.

Another reason why aluminium is best when buying bifolding doors is larger bifold panel sizes. Most PVCu doors typically go up to around 900mm per panel. Aluminium bifolds go up to 1200mm wide with most brands and even up to 1500mm wide with a Schuco-branded folding sliding door. The same applies to bifolding door heights with aluminium exceeding other materials in how high your doors go up to.

Why does this matter? Aluminium bifolding doors give you fewer panels than other materials across the same size opening. Fewer panels again mean larger glass sizes, fewer visible mullions and altogether better bifolding doors in situ.

Colour is yet another reason why aluminium is better when buying bifold doors. There’s no other material offering not just a choice of shades but also different textures. Aluminium bifolds give you over 200 different colours. Better than PVCu or timber bifolds are colours with texture. Or you can choose an authentic woodgrain finish if your property needs it without the maintenance of wood doors. When you want ultra-modern, metallic colours deliver an altogether different look and feel to your new folding sliding doors.

buying bifold doors with a picture of slimmest bifolds

Why sightlines matter on bifolding doors

The less visual bulk in your doors, the better they look. So look for bifolding doors with slimmer sightlines when all the panels are closed. Many bifolding doors on the market offer mullion sightlines of around 135mm to 154mm or more. The good news is there are slimmer models on the market.

What’s the benefit of slimmer bifolds? Apart from more pleasing lines, it’s another reason for getting larger glass panels and a more spacious feel in your room.

The Origin slimline bifold has sightlines of only 110mm, making it one of the thinnest premium quality bifolds on the market. Even better with this door is getting matching single or double doors with the same neat proportions. Our Solarlux product is the slimmest, with 99mm mullions and you’ll be hard pushed to find a thinner product on the market. Or for something in the middle, Schuco has the most popular and desirable aesthetic at 120mm.

So our advice for getting the best looking bifolding door is to look for those with thinner sightlines.

Solarlux ecoline bifolds in black

How better hardware matters when buying bifold doors

One of the best ways of understanding what makes a better bifolding door over and above what you get with any bifold is the quality of the hardware.

The lighter, quieter, smoother and effortless a bifold is to fully fold is your best clue to the quality of the hardware and the product. For the best operation, nothing beats the German-designed or made bifolding doors like Solarlux or Schuco. Don’t just take our word for it. We’ve got three brands in our showroom and you can come and see this for yourself.

Then it’s the quality of the hardware itself. Most lower-priced bifolding doors come with the same style of handle you get on cheaper doors where you see one handle combined with the key cylinder.

A higher-end bifold comes with more luxurious handles that simply look and feel better at first glance. Another feature of a quality bifold is those with a separate handle to the cylinder. Not only does it look better but the handles are significantly more premium with marine-grade metals that are thicker. Locking and opening the doors feels simply better. Of course, these types of handles last longer and are less prone to the dropping and sagging you get with cheaper handles.

The quality of the hardware also extends to critical components like the door seals. Origin bifolds are unique in giving you gaskets colour matched to seven different colour combinations. There’s nothing better than a white bifold with white gaskets or a grey modern finish with the seals in a similar colour. It’s another quality indicator when buying bifold doors.

One of the characteristics of any bifold is how much of the hardware is visible. So what better way to make these visible door rollers and guides look better than choosing what colour they come in? It’s another great quality clue when buying bifold doors and our range gives you these options.

low or flush threshold on bifolding or sliding doors showing German bifold doors

Why low thresholds are not all the same when buying bifold doors

Want the low and flush threshold on your folding doors? Here’s another area where the upper-tier bifold surpasses a standard door on the market. Most regular bifolds only give you two threshold options – the standard and a low version. The problem with the low version on many brands is it’s only intended for internal use. So many brands work on setting the standard threshold lower giving you the flush look. And in most cases, this is just fine. We also offer this option.

Better bifolding doors give you more than two options and some of our doors come with up to five different threshold solutions. If you want a low threshold for its styling any bifold will meet your needs. If you need a low threshold for better accessibility and weather performance, perhaps you have a relative with a wheelchair or mobility issues. Better bifolding doors give you more options at the threshold and again, our product range meets most requirements. It’s another consideration when buying bifold doors.

Understanding what are the best bifolding doors sizes

The size of your existing or new door opening determines most bifolding doors sizes and indeed whether your opening suits bifolds or whether French doors may be more suitable in a smaller doorway.

Generally, openings of more than 2.2m wide are suitable for a three panel bifold right up to larger folding glass walls with multiple door panels spanning up to 8 or more metres.

Another consideration is the number of panels. Going for wider door panels could also mean fewer of them. We have bifolds providing solutions with three panel designs where many other brands need four panels across the same size of opening. Contact us and we can help you design the best bifolding door at the most suitable sizes for your use and your property type.

Overall, when buying bifold doors, consider larger panels combined with slimmer bifolding door profiles that give the best look overall, for maximum light, reduced aluminium lines and better bifolding doors.

The UK’s best bifolding door brands by aluhome

At aluhome, we’ve got the UK’s most desirable bifolding door brands, made by the finest manufacturers. Every one of our brands promises more features, design benefits, functionality and customisation than most on the market.

Our Origin range gives you a choice of models with two sightlines and one of the UK’s best known brands. Schuco bifolds deliver the finest in design and engineering with contemporary styling and spectacular slide and fold action.

Solarlux bifolding doors are our top of the range Made in Germany high-end solution when you want a bifolding door like no other.

Contact us today or visit our Aluminium Studio in Stamford where you can view these in full-size models alongside matching aluminium windows, front doors, residential doors, sliding doors and more.


Some of the images on our website illustrate how products may look and are indicative. Please get in touch with us for current product details and specifications.


Gooches Court meadows, Stamford PE9 2RE
Monday, Tuesday, Wednesday, Thursday, Friday10:00 – 1600
01780 723864

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4.9
Based on 180 reviews
John Boardman profile picture
John Boardman
3 weeks ago
Outstanding advice and excellent service. I am very glad I chose to work with Aluhome on my house build.
Ciara Morris profile picture
Ciara Morris
4 weeks ago
A huge thank you to the team at Alu Home Stamford, particularly Tim for his guidance throughout the sales process and Aaron for the excellent customer service and install.

Our new aluminium sliding doors have exceeded all our expectations and are the thing that people comment on the most in our newly renovated kitchen. The quality of the doors are fantastic and are completely beyond what we’ve seen offered by other companies.

The whole process was hassle-free, communication was great, and the installation was finished to a very high standard. We wouldn't hesitate to use them again or recommend them to friends and family. Thank you Alu Home!
Karli Boxall profile picture
Karli Boxall
1 month ago
Origin 49 Bifold doors.
Honestly, I cannot rate Aluhomes highly enough from start to finish their service and staff are incredible.
The manager Tim is so knowledgeable and helpful and he explains everything so clearly giving us different options and ideas, the administration then keep you updated with payments, installation dates etc and then the installation team are also excellent, fitting to an exceptional standard. Honestly every step of the way the standard is impeccable and we would highly recommend them, we honestly couldn’t be happier with the whole process and our doors look incredible.
Thank you again.
Matt Alls profile picture
Matt Alls
2 months ago
I cannot recommend Aluhome enough. Tim was super knowledgable and steered us through the whole project. We had obtained a quote by another company previously which we felt was very high. Tim gave us a very transparent and fully itemised quote which was 40% less than we had been quoted and for a superior product.

The quality look and feel of our garden room is tremendous; and has totally transformed our Edwardian property. The Aluhome team made sure it seamlessly integrated the traditional and new.

Thank you Tim and all the team
Andy Elkington profile picture
Andy Elkington
3 months ago
Aluhome were recommended to us due to the superb quality of the product, the care and precision of the installation and the expertise of Tim and his team. And they have exceeded our expectations! Tim has stayed very close to the project all the way through, making sure that every aspect was considered and we have hugely benefited from his experience and advice. Thank you Tim and the Aluhome team. We're delighted with the outcome and the experience of working with Aluhome, and would highly recommend. Andy & Sue
Phil Harvey profile picture
Phil Harvey
4 months ago
We had some sliding pocket doors and windows supplied & fitted by Aluhome & were very impressed with the service and installation.Tim liased with the architect & builder so they understood the building requirements and the installation was smooth & efficient. We had a slight problem with some foam around the frames but this was sorted quickly & without fuss .Overall a good experience and we’re very happy with the results
Guy Ongley profile picture
Guy Ongley
4 months ago
A huge thanks to Tim and the Aluhome Team. From the first communication through to delivery, installation and follow-up visit we have had 100% confidence in the design, supply, fitting and suitability of these doors.

They work like a dream, so easy for anyone to operate. They are fully secure in the open position and when closed they have a substantial locking mechanism.

The chaps that installed are great and most importantly do all their work for Aluhome (some suppliers use 'freelancers'!). They are always on call and will be around ASAP to provide any required fix - the lock mechanism needed some minor attention.

Tim has a proper showroom where you can see all the products you are considering and he has all the knowledge to hand about what is most suitable for any installation type.
Andrew Duncombe profile picture
Andrew Duncombe
4 months ago
Good knowledge and everything was carried out as promised. Would recommend to anyone
Steve Ellwood profile picture
Steve Ellwood
5 months ago
We have been delighted with the Aluhome Service. The initial design and specification was thorough and despite a delay in manufacture the installation team were flexible and very helpful. The windows look fantastic and we would thoroughly recommend Tim and the Aluhome team.
Janice Morrison profile picture
Janice Morrison
5 months ago
Helpful advice given and three alternative plans fully drawn up and priced for us to choose the best option for us.

The planned timetable was stuck to and the guys got on with working even though it was raining.

Very friendly staff/workers, the process went smoothly from start to finish and the windows and doors are extremely high quality.

We're very pleased with the results.

Thanks to Tim and the team!
Lisa Hay profile picture
Lisa Hay
5 months ago
We recently had slimline aluminium patio sliding doors installed by Aluhome and we’re really pleased with the result. The doors look fantastic and have completely transformed the space, bringing in much more light and giving a clean, modern finish.

From the initial enquiry with Tim through to installation by Aaron and team the whole process was smooth and professional. The team were extremely helpful, knowledgeable and great to deal with throughout.

A small prei-installation issue did arise, through no fault of anyone’s but it was handled straight away and professionally, which really showed Tim and Aaron’s commitment to customer service and ensuring a first class service is provided

Overall, a great experience and we would highly recommend Aluhome to anyone considering doors or windows.
Clare B profile picture
Clare B
5 months ago
Reliable company with hassle free process from start to finish.
Damon Randall profile picture
Damon Randall
5 months ago
I found alühome after a frustrating experience with another supplier who had quoted me around £55k for windows, rooflights and 6 metre Cortizo Cor Vision sliding doors — then started pushing me towards compromises I wasn't prepared to accept. I filled in a few web enquiry forms one afternoon, and by 7pm that evening Tim called me personally. An hour later I'd agreed to visit the showroom with my plans.
That call set the tone for everything that followed. Tim was straight-talking, knowledgeable and genuinely interested in getting the right result — not just closing a sale. We ended up with everything I originally wanted: all windows, rooflights and the full 6 metre Cortizo Cor Vision sliding doors, for £15,000 less than the previous quote. The product wasn't compromised. The service wasn't compromised. The price just made more sense.
The installation wasn't without its moments — any large project rarely is — but true to Tim's word, alühome simply owned it. No deflecting, no excuses. That's rare and it matters.
If you're in the middle of a renovation and feeling like you're being herded toward a version of what you wanted rather than what you actually specified — call Tim. The showroom in Stamford is worth the trip. - Photos to be updated when the job is complete!!
Joshua Freeman profile picture
Joshua Freeman
9 months ago
Aluhome was a fantastic find for us. Tim is incredibly knowledgeable and helped us navigate the onerous energy efficiency and overheating requirements placed on us by building regulations. He has an eye for the detail as well as the design. He created a brilliant bespoke back door exactly to our requirements.
Aaron and the fitting team did a great job both at initial installation and the later follow ups.
The Origin windows are a brilliant product robust with a great look and the Cortizo slider is amazing. Thanks Tim, Anita, Aaron and the team.
She83 profile picture
She83
10 months ago
I randomly came across Aluhomes while researching Aluminium sliding doors online, and i’m so glad I found them. Tim the owner is really nice and knowledgable and made so much effort to get my order through in time even though I left it to the very last minute. Before they took on my order, him and his team made sure they could logistically get the glass through my front door as I didn’t have any side access, which most other suppliers didn’t even talk about to ensure I didn’t have any extra costs for installation.

We purchased the SunFlex20 sliding doors, which are absolutely beautiful.

I am based in Greater London so was really happy they were willing to travel to me and compared to other suppliers they were well priced and the service was second to none. Tim gave me all the information I needed to make an informed decision and I felt like I was in safe hands which was reassuring especially when purchasing a large order like this.

If I ever want to purchase Aluminium doors in the future without a doubt Aluhomes will be my first choice. Thanks again Tim & Aluhome team!
Chris Coxon profile picture
Chris Coxon
10 months ago
Many thanks to Tim, Aaron and the team at Aluhome. Our product and service has been first class. We were quite specific about what we wanted, which wasn’t a big grand project, but the quality and attention to detail was still great. Having worked in the glazing industry I was wary about who I could trust with my own home, but I’d definitely recommend Aluhome!
Matt Pinder profile picture
Matt Pinder
1 year ago
Tim and team have been a pleasure to deal with. Tim's attention to detail when scoping the work was truly impressive and he walked us through all the options and combinations available to meet or needs with care and attention. He is a real expert in his field with incredible knowledge of the products and industry. The install team were fantastic and incredibly efficient, tidy and professional. We felt in safe hands from start to finish and the after care from the whole team has been fantastic. We felt as though Tim and team were treating the project like it was their own home and they have been incredible partners. Thank you Aluhome!
Angela Driver profile picture
Angela Driver
1 year ago
Tim and all the team at Aluhome have been brilliant. Their knowledge, attention to detail and desire to get it right has meant that the finished product and the journey to get there was made both slick and effortless. Tim is always on hand to offer his expertise, advice and solutions. The quality of the windows and doors is excellent alongside the fitting to match. We would have no hesitation in recommending Tim and his team.
M & A Driver, Lincolnshire
Dave Lee profile picture
Dave Lee
2 years ago
We had previously looked at a number of companies for sliding doors and were disappointed by the lack of technical detail they could provide, so we were very impressed with the response we got from Aluhome. The discussions with Tim regarding details of the products and technical information was so helpful. We had sliding doors installed a few months ago. Very happy with the look and the operation of the doors.
The Installation team were friendly, efficient and did an excellent job.
We highly recommend Tim and his colleagues at Aluhome.
Louise Williams profile picture
Louise Williams
2 years ago
Tim, Aaron and the whole team at Aluhome created an incredible transformation to our home with their beautiful windows and doors throughout. An integral part of this renovation was to bring the garden “in” and Tim absolutely understood that we wanted clear, unobstructed views. He therefore recommended these superb patio doors which enhance not only the view but the feel of space and openness. We are absolutely thrilled with the result and cannot recommend Aluhome highly enough.
Tim and the aluhome team were incredibly knowledgeable and helpful and well worth considering if you're in the market for doors and windows. You'll struggle to find another supplier with this level of service, knowledge and attention to detail. Heartily recommended!
Jennifer Jackson profile picture
Jennifer Jackson
2 years ago
Thank you to Tim and your team for the great products you have supplied us to complete our extension. It was a pleasure dealing with your company. Tim’s product knowledge and advice was first class and a stress free experience. After our initial visit to the showroom in Stamford and discussion with Tim , it was an easy decision to place the order for our roof lantern and patio doors with Aluhome, and we were not disappointed !
We would highly recommend Aluhome and would most definitely use them again .
Geoff Hammond profile picture
Geoff Hammond
2 years ago
Very satisfied from the first showroom meeting to final fitment of Bi-folds. No hard sell, just helpful and happy to spend time with you . Full fitment in 1 day with very good fitters. Pleasure to do business with. Would highly recommend
william haley profile picture
william haley
2 years ago
Always very professional, responded to our questions about specifications and options. The outcome is a great looking house with a great deal more natural light than we had with the windows that came with the house, I would estimate that it allows about 30% more light into the house than before.
The installers were excellent and left the house clean and tidy after their effortless installation.
The design of the window profiles is simple, clean and elegant with no frills just what we wanted.
The triple glazing is much quieter than our previous double glazed windows.
We are therefore extremely pleased with the outcome and have had many neighbours standing and staring at our new facade.
Peter Waite profile picture
Peter Waite
2 years ago
The doors are great!!
Peter Molyneux profile picture
Peter Molyneux
2 years ago
In October we started on a complete renovation of a grade 2 listed property near Banbury which would include a kitchen extension. The planning permission granted required the walls to be built almost entirely of glass. The local quote I received was bonkers and after much research found Aluhome. Their quote was more in line with what I had expected for exactly the same product. Working with Tim was a dream, their timing, delivery and installation was perfect and the product was exactly as discussed. There was a very small leak after some exceptionally heavy rains which they fixed with a smile as soon as the rains had stopped. All in all I couldn't be happier and highly recommend anyone give Aluhome a try. A big thanks to all the team.
Kev Yates profile picture
Kev Yates
2 years ago
We couldn't be more thrilled with the products and service we received from Aluhome. In particular, Tim Armitage, was so helpful and informative, and he was determined to give us the very best product for our budget. The time spent in his office thrashing out the finer detail was not wasted, and from start to finish we felt supported and guided at every stage. He even went above and beyond in offering advice on building companies, one of whom we ended up using, with stunning results. The installation team were fantastic - professional, always on time, and masterly in their work. The windows and doors were, to us, a vital part of our build, and even now, all these months later, we never tire of looking at them, knowing that we made the very best decision. The colour, thin profiles, and smooth workings are an absolute joy, they look so classy and beautiful. We put in extensive research online to get to Aluhome, and we will always thank our lucky stars that we did. Christine and Kev Yates
Sarah Weldon profile picture
Sarah Weldon
2 years ago
After many discussions about whether to go for bifold or sliding doors, we are delighted that we chose these Sunflex sliding doors. The 20mm sight line makes a huge difference when they are closed but opening them creates a wonderful inside/outside feeling. Tim is most certainly a guru when it comes to glass products and he clearly explained and demonstrated the quality of the sliding mechanism and the benefits of these doors. We thought we would need to have a double window over the sink but Tim informed us that if we made the window slightly smaller (150cm) he could provide us with a single pane window, giving a lovely uninterrupted picture view to the garden. He was very patient with our many questions and was keen to get it right for us. We had good communication from Anita who kept us well-informed of delivery and fitting dates. Aaron and his team of fitters did a great job and came back promptly to sort out one or two small issues. We are glad that we chose Alühome and highly recommend them.
Will Dixon profile picture
Will Dixon
2 years ago
We are thrilled with our new doors. Tim provided a quick and simple buying process and was very easy to work with - the installation team were on time, efficient and very pleasant to deal with - all was completed in one day.
Rod Harris profile picture
Rod Harris
2 years ago
We found Aluhome (don’t know how to do dots) on google, and what a find that was. If you want to work with a small independent business who take great pride in their product, service and reputation at a very fair price, you’ve come to the right place. Tim’s service is exceptional. He was ‘on it’ without being at all pushy – good sound advice and almost instant responses to queries, whatever time of day or night, as our spec changed. The skill of the survey and fitting was an absolute joy to watch. We couldn’t be more delighted with our Sunflex Bifold doors, with matching back door and kitchen window!
Jerry Dodd profile picture
Jerry Dodd
2 years ago
During our research we visited 5 window replacement companies and 3 factories producing frames. After a visit to Aluhome we quickly established a good rapport with Tim, the director, whose knowledge and experience exceeded all we had experienced. He established a clear understanding of all of our concerns and requirements, and reassured us they could meet them all.
We are absolutely delighted with the windows and patio door. The quality of these aluminium frames, the powder coating and the ease of opening are all first class.
We chose triple glazing at such little extra to the overall cost and it was well worth it.
Aluhome have their own very competent and pleasant installation team. They are all very customer caring and reduced all the usual expected concerns we might have had.
We are very happy to unreservedly recommend Aluhome.
Donna White profile picture
Donna White
2 years ago
Brilliant service all round. Tim had so much knowledge regarding the doors and ordering was very easy. Aaron did the survey, again very knowledgeable and helpful with keeping me up to date with home visit. On the day of fitting guys on time, quick fitting, extremely clean and tidy and all rubbish removed. My picture does not do the bi-fold doors justice. Would recommend to anyone and everyone
Salam Daniel profile picture
Salam Daniel
2 years ago
Thank you Tim and your team at Aluhome for our stunning 20mm sunflex 5 sliding doors.
Looking amazing great job.
Steven Brown profile picture
Steven Brown
2 years ago
So glad we decided to switch from bi-folding doors from a different supplier to our amazing Sunflex SVG20 Triple track sliding doors through alühome! Worth every penny! Tim, Anita and the team were amazing from start to finish, even when we had a slight issue with the size of the large picture window, a solution was found. The actual delivery and fitting was completed on a tight deadline and they came back and sorted a small problem quickly and professionally. Tim was always at the end of a phone to give advice and that was much appreciated! If only other window and door suppliers were this reliable! We are so delighted with the finished result and everyone comments on how amazing the view is through the huge windows! We can’t wait for the summer to enjoy opening up the doors into the garden! Thanks again alühome!
Kathryn Newell profile picture
Kathryn Newell
3 years ago
Tim knows his stuff when it comes to glass!
We had been keen to use a local supplier, as we wanted the assurance of speaking to a professional and seeing the product beforehand ,so we could make the right choices for our build .We were not disappointed ! Tim and his team were able to answer any queries we had and advise on on the best options for our needs.
Installation was seamless.
We are very happy with our new windows and sliding door.
Mark and Kathryn
Justin Bell profile picture
Justin Bell
3 years ago
Great Product, cracking bunch of lads nothing was to much trouble for Aaron there lead fitter.

Published on August 13, 2021