Six important features of slimline sliding doors

Panoramic Sliding Doors, Slimline Sliding Doors, Minimalist Windows, Ultra-thin sliding doors, frameless sliding doors are just some of the expressions used for the latest generation of aluminium sliding patio doors with a minimal visible amount of aluminium and the maximum amount of glass. When compared to conventional patio doors, the features of slimline sliding doors stand out.

The key features of slimline sliding doors.

Slimline sliding doors still slide in the same way as the familiar aluminium patio door. The inline design enables the doors to move within a single, double or triple track. The number of tracks is usually determined by the number of sliding panels and the door configuration.

features of slimline sliding doors and why buy them
Slimline sliding doors differ substantially from conventional aluminium sliding patio doors.

There are six significant differences between a conventional aluminium sliding patio door and this new generation of slimline patio doors.

  • Cost
  • Aesthetics
  • Operation
  • Manufacturing
  • Transportation
  • Installation

How much do slimline sliding doors cost?

A standard sliding patio door from the main aluminium systems companies in the UK, fitted into a standard 3metre x 2500mm high can start from £3500. Slimline sliding doors at a similar size can start from £7500.00. As a result of the unexpectedly high cost, we receive many enquiries on this website asking for a more cost-effective solution that offers the same features and aesthetics. One solution is the SUNFLEX SVG30 with excellent sightlines of just 30mm at less cost.

If you are looking to fit one of the current generation slim sliding doors in your home, you should expect a high price although there are comparable products. Contact us for further information and advice.


The aesthetic advantage of slimline sliding doors is one of the main advantages. Every element of this kind of sliding door is thinner, less intrusive and maximising the glass area.

Slimline sliding doors are frequently seen in building openings that are taller and wider than a conventional door aperture. It is slimline doors that frequently have the aesthetics and sight lines to create a sliding glass wall. Some door products are possible at 5 metres high or more.

The interlock is the vertical mullion where the sliding panels meet. Many conventional sliding doors offer interlocks of between 35mm and 110mm. Slimline sliding doors are available with interlocks as narrow as 17mm. This significant reduction in one of the key structural and visual profiles of a sliding door is a big part of their appeal.


Slimline sliding doors utilise the very latest rollers, gearing, components, locking systems and even motors. Many homeowners putting large and heavy doors in their home also take up the option to automate them. You wil find most of the current slimline sliding doors on the market are available with an automatic opening and closing action.

Even when slimline sliding doors are manually operated, the gearing and rollers is so sophisticated they are effortless to open and close. Individual panels can weigh more than 400kg yet can be slid open with one hand.

Automatic operation is usually not available with conventional aluminium sliding doors.


Slimline sliding doors appeal because of their quality, high performance and top-end engineering. With the high cost of these doors, customers expect a flawless product. These doors must meet the exacting and demanding requirements of architects and discerning end-user clients and are manufactured to meet these demands.

Some products are manufactured around the glass; others are intended to be glazed once installed. Whichever method or product is used, the manufacturing methods in these types of doors differ from traditional sliding doors that are so simple to make some even come as cut to size kits.


Slimline sliding doors are frequently much bigger than regular patio doors. Even the best and longest-established window and door installers only have standard size vans and will not own the equipment needed to transport the doors and handle the glass.  Moving, glazing and installing slimline sliding doors often calls for specialist plant and machinery as well as trained installers. We would regard the installation of these doors as ‘high-end’ glazing.

The professional installers of slimline sliding doors should explain what is involved in delivering, fitting and glazing these doors. They are different to standard sliding doors.


Precision manufacturing and a flawless installation are paramount to ensure the reliability and long-term performance of slimline sliding doors.

Often the outer frame and track are hidden within the building structure to create the frameless and all glass appearance. With the frames concealed, what happens should a sliding door require maintenance or repair? The professional installers of these doors have to consider all the scenarios post installation and into the future.

Expect the installation of slimline sliding doors to be far more complicated and involved than with a conventional patio door. You can expect this to be reflected in the overall price as well.

Contact us if you would like further information about slimline sliding doors.

Published on July 14, 2017

Reader Interactions


  1. Kirsty port says

    Hi I’m based in Norwich, looking for slimline aluminium sliding doors for a 5/6m opening.
    What’s the best quality company to go for if your on a tight budget and really need a lower end price?
    Lots of choice and no idea!

    • Nick Dardalis says

      Hello Kirsty

      Due to the increasing volume of comments, we are struggling to manage these via the comment forms. Therefore, please can you use our contact form where these are managed and always responded to.

      Kind regards

  2. Sue says

    We can’t decide between bi fold doors and sliding doors for a 5 metre opening on the back of our house. Whichever we choose there will not be another door into the back garden. Would we be better with bi fold doors, which we have had at our previous house, or could we open and close a sliding door regularly to go in and out? Also, if we decide on sliding doors , in your opinion, should we have 2 or 3 panels?

    • Nick Dardalis says

      Hi Olivia, if you’ve only got the one door out to your garden, then a bifolding door with a traffic leaf lets you use that just like a regular door without having to fold all the panels back every time. If you had this previously, then you’ll be aware of the functionality.

      Sliding doors are perfectly good for day-to-day use and you’ve the option of inline or lift and slide

      The choice of two or three panels is down to you. The benefit of two is one less vertical visible mullion and larger glass sizes. With a double track and both leaves operational, you can choose whether to use the left or the right slider.

      Three panels will give you a two thirds clear opening whereas two panels only give you half, so that may be something to look at and see what you’d prefer. Again, with a triple track you can move two panels either side, sitting behind the one.

      Do go see some products and see how they will work for you. Other than the functionality explained above, if you’ve got a smaller garden then a bifold appears to open up the space and make the entire garden look bigger. If you’ve a larger garden or nice views then sliding doors make the most of these.

      Of course the one benefit of sliders over bifolds is less visible aluminium. A five metre opening depending on the number of leaves will give you five or six panels, a slider two or three.

      Do get in touch via the contact form with your location and I can try put you in touch with some installers.

      Hope this helps
      Kind regards,

  3. Graeme Bell says

    Hi I am based in central scotland and looking for a sliding door similar to sunflex svg-30 who will do a supply only to trade (as sadly sunflex dont do that)

    Any ideas? thanks

    • Nick Dardalis says

      Hi Graeme, thanks for your comment. Our understanding is that Mitchell Glass in Scotland work with Sunflex so it may be worth getting in touch with them about Sunflex products on a trade supply only basis.
      or get in touch with us via the contact form and will try help you out.

  4. Ian Drury says

    Hi, I’m looking into an extension and want to fit sliding doors into an opening of approximately 5m x 2.1m and incorporate a roof lantern of approximately 2m x 2m
    It is quite a windy location so not sure if it makes a difference of a 2 door or 3 door system, also approx, price difference and suppliers in west Yorkshire

  5. Andy B says

    Hi I am thinking of purchasing the express xp glide panoramic – it looks great but not sure what system it uses, would be keen to get your view on the quality and value of this product, also as the glass is bonded to the frame is this a negative point, I really don’t want any issues down the line. Thanks

    • Nick Dardalis says

      Hello Andy, thanks for your question. We understand that the Express XP Glide Panoramic uses the Italian Metra NC-S 120 STH Slim Sliding Door system. Im sure Express can clarify this if you ask them. It’s a good sliding door system correctly made and fitted and looks great. The structurally bonded method shouldn’t be an issue but we are hearing of some older structurally bonded doors with failing glass units being quite hard to work with on repairing the glass. Therefore it’s worth checking with Express what is involved should, for instance, the glass break, get damaged or need replacement if the unit fails. These doors are more complicated to re-glaze and repair in the years to come than conventional dry-glazed sliding doors.

      Hope this helps
      Kind regards

      • Warren says

        Hello Nick
        I think this is the only information i can find online regarding the post installation. I’m planning to build a new house with full of sliding door facing to the south and also struggling the same issue which is repair/replace if the glass is broken.
        The system i intend to use is minimal frame similar to slimline or IQ etc, however if the glass is bonded into the frame, to replace the broken pane, will it just simply lift and remove it out of the track/ frame then replace the whole pane and put it back?
        What about the fixed pane ( for example : triple track system with two sliding pane and one fix pane ), is there any beading ? Does it have to remove the whole frame out?

        Thank you

        • Nick Dardalis says

          Hello Warren, every door is different but the fixed panel with most products is sliding panel without the mechanism. With most systems, you should be able to retain the frame in place, lift out the panel with the broken glass and put back on the track/frame.

          Every door should have the facility to de-glaze/replace the glass. How much work is involved depends on the system. And bear in mind for those doors with the frame set into the structure, giving a frameless appearance, the job of replacing failed/broken glass is more involved.

          Hope this helps, do get in touch if you need more information.

  6. Luke says

    Hi we are looking to install slimline sliding doors. There are a few we are looking at, but pc20 are the ones we are thinking of. However I can not find any information about the company or reviews. Do you know anything about them

    • Nick Dardalis says

      Hello Luke, thanks for your question. Perfect Crystal I think is the company you’re referring to supplying these doors. They use (If my information is still current) either the Cortizo System or the SAPA slim sliding door system. They’ve rebranded these products as their own which many installers do if they wish to.

      Both systems correctly made and fitted should serve you well and meet current weather, security and other component standards.

      Hope this helps
      Kind regards

  7. Clive Roberts says

    Hi, I am looking for slimline, sliding panel glass doors, either stacking or drag and drop.
    I’d be more interested if the company could meet all glazing requirements, including skylights for a flat roof extension.
    I would prefer a relatively local supplier if possible.
    Many thanks

    • Nick Dardalis says

      Hello Clive, thank you for your enquiry to the Aluminium Trade Supply Website.
      If you would like to get in touch with us via our contact form with your location, we can put you in touch with suitable suppliers.
      Hope this helps
      Kind regards

  8. Nadira Islam says

    I was looking for a slim frame aluminium sliding door that is able to be automated for a residential property. Please can you advise which retailers I could use to get this product. I am aware that there is architectural vision systems and I was wondering if there’s anything similar to them please.

    • Nick Dardalis says

      Hi Nadira, thank you for your enquiry to the Aluminium Trade Supply Website.

      If you can give me your location via the contact form on the website, I can suggest local companies with the right products and service that can help you. Do let me know and I can assist you further.

  9. BSargent says

    I am looking for as Stack and slide system in other words similar to the bifold but without attaching hinges can you advise me which companies manufacture this profile