ATS reviews Comar bifolding doors

Photo of author

Nick Dardalis

Updated on

Comar bifolding doors are part of the overall Comar 7Pi range of insulated and high-performance door sets.  In the range are sliding, folding, hinged and commercial doors.

Architects and building designers have for years worked with Comar products in their residential and commercial building projects. Fabricators and installers benefit from an easy to fabricate and install bifolding door system that is flexible, functional and reliable.  Comar is well known for the broad range of products and reliable service to the manufacturers and the construction sector.

Comar bifolding doors, key features.

comar bifolding doors in white to new house extension.
Comar bifolding doors are British designed and made featuring some of the thinnest sight lines amongst folding doors.

Just like all the other Comar doors, the 7P.i bifolding door is ideal as a standalone product or integrated into curtain walling, ground floor framing or as part of a combination screen. Toplights and sidelights are also possible.

  • Available from two to eight panels, opening in or out.
  • A bottom hung system with no weight on the top rail of the product.
  • Hidden roller mechanisms within the door stiles.
  • Anti-finger trap facility.
  • Compliant with Lifetime Homes Specifications.
  • Up to 62mm glazing thickness possible.

Comar Bifolding door construction and assembly.

In line with other quality bifolding door systems, Comar bifolding doors feature a mechanical construction with a square cut frame and mitred door sashes. To the edge of the door sashes, a PVC clip-in profile is provided. This profile gives a tidy appearance to the door sash edge when the doors are stacked in the open position. At the same time, this PVCu profile provides intermediate weathering with a seal in three different areas.

The glazing of Comar bifolding doors is by the conventional dry-glazed method using quality EPDM glazing gaskets and internal glazing beads. Comar is amongst only a few bifolding door systems that can achieve glass thicknesses of up to 62mm. This makes Comar doors ideal for triple glazing, specialist acoustic or security glass, solar control glass and units with integral blinds.

Comar bifolding door key profiles.

The first noticeable feature about the Comar bifolding door is the broad range of sections that provide many different product applications and solutions.

Firstly is the adjustable frame jamb. Sections CS7004 and CS7005 are two part sections enabling adjust on site when needed. The opposite side of the bifolding doors has a thermally broken 35mm fixed frame jamb. The bifolding door sections at the cill comprise a rebated frame (also used at the head), a double-ramped cill and a single ramped section for use with subcells and to meet other site conditions. Also available is a flat section with no ramp detail to the edge of the profile.

For internal applications or where the thermal insulation is not a pre-requisite, Comar also provides a non-thermal cill and a single ramp cill track with the ramp reversed. Finally to meet the requirements of DDA, a very low ramped threshold with a large polyamide thermal break is also available. These seven different profiles for the base of the bifold enable most site conditions to be met in both commercial and residential settings.

Finally, for installers, a choice of 10 cill profiles are available ranging from 52mm stub cill right up to a 195mm thermally broken cill section.

The door sash profile is flat in appearance, with a 55mm sight line.

Comar bifolding door sizes and sight lines.

Comar is one of the slimmer bifolding doors available on the market thanks to the modern flat sections used and the extension choice of profiles. Profiles are 78mm front to back making them ideal for new build or refurbishment applications.

Head and cill.

At the top of the bifolds, a typical sight line of 108mm is achieved with the standard frame head and door panel top rail. This extends to 138mm when the optional CS947 frame head extension is used or 153mm with the deeper head extension.The same 108mm sight line carries through to the bottom of the bifolding doors when used with the rebated track section, C7003.

A deep bottom rail option.

A great feature found in Comar bifolding doors is the ‘kicker plate’ option. This is an additional 100mm section fixed to the sash profile, giving a deep bottom rail option. It is ideal for commercial applications or for where the client requires a thicker sight line at the bottom of the doors.


At the fixed door jamb, Comar bifolding doors feature a slim 100mm sight line. At the adjustable door jamb, the sight line is 106mm at the minimum tolerance and 110mm to 114mm at the maximum.

Both these dimensions position the Comar door as one of the thinner bifolding doors on the market. When a traffic door is used on the one side, sizes vary depending on whether the traffic door opens in or out and the overall configuration of the doors.

Comar offers both a fixed and floating corner post options.

Meeting Stiles.

When it comes to bifolding door sight lines at the meeting stiles, Comar is at the top of the well-known aluminium systems. Here is how the Comar door compares.

Comar 7P.i 120mm
Schuco ASS70FD 120mm
Air 800 Bifolding Door 122mm
Reynaers CF 77 SL 122mm
Senior Architectural Alifold and PUReFold Doors 123mm
Reynaers CF68 131mm
SAPA Crown Folding Door with new slim sash 131mm
Smart Systems Visofold 1000 132mm
AluK BSF70 Folding Sliding Door 141mm
Reynaers CF77 144mm
Origin Bifolding Door 154mm
Warmcore Bifolding Doors 156mm

It is worth pointing out that the 120mm sight line on the Comar folding door will increase where two opening leaves meet.

Bifolding door midrail.

Comar bifolding doors are also available with several midrail options. The CS944 and CS945 midrail section. These offer a 150mm or 200mm midrail. Ideal for bifolding doors in bars, restaurants or other commercial applications as it can incorporate a letter plate.

There is a further option of the CS980 65mm, CS981 70mm, CS982 85mm and the CS983 105mm midrail for those projects wanting a standard midrail in bifolding doors.

Not everyone will desire a midrail in a folding door. However, Comar demonstrates their expertise in flexible bifolding doors with a choice of ancillary profiles that make their products adaptable in different projects and uses.

Comar bifolding door leaf sizes and weights.

For standard doors not exceeding 80kg, leaf sizes of 1100mm wide and 2400mm high are recommended. Should taller door leaves are required, these are possible subject to overall door sizes and other design considerations.

Comar bifolding doors weather performance and security.

white comar bifold doors
Midrails, floating and fixed corner posts and many extra profiles make Comar bifolds, flexible and adaptable.

Performance testing on Comar bifolding doors is carried out to BS6375 standards and provides excellent levels of weather resistance and security testing.

  • Security testing to PAS 24: 2012
  • Air permeability. BS EN 1026: 2000 BS EN 12207: 2000 600 Pascals Class 3
  • Watertightness. BS EN 1027: 2000 BS EN 12208: 2000 600 Pascals Class 9A
  • Wind Resistance. BS EN 12211:2000 BS EN 12210:2000 1200Pa Class A2
  • Exposure Category. BS 6375: Part 1:2009 1200Pa

What we think of the Comar 7P.i bifolding door.

There are many good bifolding doors on the market. Given the maturity of this sector and how systems companies and independent manufacturers have adapted their bifolding doors, all systems offer great bifolding door products.

We have carried out this review of the Comar bifolding door with close examination of their section drawings, fabrication and installation manuals. We like the Comar door for several reasons.

  • The excellent choice of sections and ancillary profiles.
  • The slim sight lines for those that want an option to a Schuco door.
  • The contemporary aesthetic.
  • The broad range of midrails, cills and other sections.
  • The suitability of the Comar bifold for both residential and commercial projects.

Many installers will assume that Comar is a commercial systems company. It is certainly true that Comar is hugely active in the specification sector with a substantial portfolio of projects.

What you may not know is that Comar products are widely installed in dwellings as well as commercial buildings. Many flats, new build properties and refurbished building feature aluminium bifolding doors, entrance doors and windows by Comar.

You will not find Comar in your average double glazing showroom, however, Comar service a network of some of the most expert aluminium fabricators in the UK. These manufacturers use Comar for the service, ease of fabrication, popularity of the system in construction and the specification.

From a residential perspective, the Comar folding door can be considered for their slim sight lines if installers and homeowners are looking for a slimline and British alternative to Schuco and other slimline folding doors.

Finally, the flexibility of the Comar bifolding door and the technical expertise of Comar as a systems company enables most design briefs to be met for both residential property and commercial buildings.

Contact us if you would like more information about the Comar 7P.i Folding Sliding Door.

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