Cortizo Cor Vision Sliding Doors Review

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Nick Dardalis

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Cortizo Cor Vision sliding doors are probably one of the UK’s most popular slimline sliding doors today. There are numerous manufacturers of these doors. Who makes, who fits, and installer expertise and knowledge are essential to getting the best possible Cortizo slider. How this popular door is engineered can also vary. In this Cortizo Cor Vision sliding doors review, we’re focusing on the standard Cortizo slider, but in particular, an enhanced version, not widely available, called the CVS 20. It’s better made, better designed, and has a few unique features you’ll rarely get on a Cor-Vision slider available by others.

Cortizo Cor Vision Sliding Door
20mm interlock sliding doors

The Cortizo Cor Vision sliding door is one of the most popular ultra-slim sliding doors with a 20mm mullion. The CVS 20 version offers flush stacking, smoother sliding, better sealing and does away with reported leaking at the track of a standard product.

Editor's Rating:


  • A better-made Cortizo sliding door.
  • The flush stacking design.
  • Significantly improved transitional movement.
  • Superior build quality and components.


  • CVS 20 not available nationwide.

What Are Cortizo Cor Vision Sliding Doors?

Cortizo sliding doors are renowned for their slimline design, incorporating sleek lines and an ultra-slim 20mm mullion, providing an almost seamless transition between the interior and exterior of a property. Extruded in Spain by Cortizo, the system company, Origin was one of the first to bring these doors to market, with what is now their OS-20 Artisan.

grey cortizo sliding door in a three pane design with modern floor showroom location and customer bar

Over the years more and more aluminium manufacturers and trade suppliers have been making Cortizo Cor Vision sliding doors as we explain in this article under all manner of brand names. What you will struggle to find is a Cortizo manufacturer manufacturing the entire UK Cortizo range, including windows, bifold doors and other products. Most focus mainly on the sliding doors.

The CVS 20 sliding door is made exclusively by one manufacturer specialising only in Cortizo doors and windows and no other system. This expertise and the obvious benefits of a sole-system manufacturing facility have created what is available in the retail market as the CVS 20 – a re-engineered version of the standard Cortizo Cor Vision sliding door. CVS 20 has improved specifications, better functionality, and vastly improved core components and features, some visible, others hidden. Overall, CVS 20 elevates a standard Cor-Vision into an altogether better product.

Cortizo CVS 20 Sliding Doors Design and Aesthetics

The design and aesthetics of Cortizo sliding doors are already impressive. Otherwise, these doors would not be as popular as they are, whether sold as Cortizo or rebranded.

The outer frames, head, cill and sliding panel profiles are all slim, allowing for more glass and less visible aluminium. The 20mm mullion is, of course, one of its best features, that looks impressive on a two panel large sliding door, but is also just as good as a three panel. Our advice is to avoid four panel versions of these doors. as the meeting stile in the middle bulk up the sightlines considerably on what is otherwise a slim sliding door.

grey cortizo sliding door in a two pane design in romford window showroom

Using a standard installation, without hiding the frame, the sightline at the frame sides is just 77mm. The head is 79mm assuming the trickle vent needed to comply with Building Regulations is also provided.

The handle on the Cortizo Cor-Vision is the instantly recognisable type, that also identifies all the other manufacturers, rebranding these doors.

Flush and unobtrusive, it operates the multipoint locking system as well as providing additional final locking, via the high-security key cylinder.

cortizo cor vision sliding doors handle in black

Cortizo Cor Vision sliding doors are characterised by their minimalist overall aesthetic and promise refined sightlines, whether you go with a standard installation or partially hide the frame in the structure or behind the plaster. They offer refined sightlines and larger glass surfaces that contribute to a more sophisticated overall appearance.

Where CVS 20 is better than the standard Cor-Vision Sliding Doors

Well made, professionally fitted by an experienced installer and correctly bonded, Cortizo Cor Vision sliding doors are an exceptional slider. The CVS 20 re-engineered versions offers three distinct additional features.

A flush stacking design

On a two or three-panel design, the CVS 20 sliding doors are available with a flush stacking design. There is only one other sliding door in the UK market with this fantastic feature. In the fully open position, other sliding doors two or three panel park in a staggered position.

The flush stacking design allows for all the panels to fully open and sit seamlessly together. the unique flush stacking design, which, when fully opened, provides a sleek appearance and maximizes the space for passage. This contrasts with the non-flush stacking design of standard Cortizo doors, offering an aesthetic and functional upgrade.

Stainless steel wheels on a stainless steel track

Many standard Cortizo sliding doors come with sliding door rollers made by Manufacturas Pabose, a specialised Spanish manufacturer of ball and needle bearings, which include sliding door rollers. These usually have plastic wheels running on the standard Cortizo track. While these work well, and a Cor Vision’s smooth and impressive sliding action, the CVS 20 comes with upgraded Pabose stainless steel rollers and track. This enhanced steel track and roller combination provides an even better-sliding feel, better transitional movement and a longer-lasting solution.

These improvements are not just superficial; the rollers and other internal components of the door have been designed for smoother sliding and a better sliding door experience for the user.

Addressing the negative Cortizo reviews about leaking door tracks

The design of the Cortizo sliding door track divides opinion. It’s a recessed type; the inevitable consequence is that water will collect on the track when it rains. This can be alarming and concerning to a homeowner having spent many thousands on Cortizo Cor Vision sliding doors. You’ll also find negative reviews online about leakage on these doors. Some are obviously down to installation and absolutely no fault of the company or the product. Others are down to how the manufacturer made the doors. Most important is how the installer designs the door for the customer at the track.

Cortizo, as a system company, has engineered the door to be suitably machined with drainage slots in specific locations and for water to drain away. Manufactured, machined and installed correctly these should not leak. Not every factory gets this right at the manufacturing stage, and the installer is often unaware until it’s too late. Water is known to find its way to the rear of the track where it meets the inside of the room. This is what alarms the customer.

The reason for this is the design of the track, specifically the part supporting the sliding panels that the wheels sit on. On Cortizo and similar doors, this most essential part of the track is set below the flush top. On other brands, the sliding panels sit level with the top of the track. Sitting level is better to prevent water ingress, but this does not mean Cortizo doors are wrong.

These doors were initially designed in Spain. In southern Europe, sliding doors are usually fitted with shutters and flyscreens. Above them, there is often a balcony or shading. All these factors provide additional protection to the door track when it rains.

The best way to ensure effective weather protection and the track and avoid the negative Cortizo reviews is to always set this door on a cill or suitable drainage system under the track. It’s as simple as that. We know manufacturers who refuse to supply a Cortizo sliding door unless they provide it with a suitable cill or drainage system because they don’t want the comeback for water leakage. This is the best way to design these doors with a flush or standard track.

Therefore, avoid buying these doors on a supply-only basis for your builder to install and use a professional Cortizo manufacturer and their trained installer who knows the doors, understands the system and knows why a cill or other drainage method under the track is essential.

Improved weather protection on the track

CVS 20 doors incorporate drainage at the bottom of the frame designed to expel water to the outside where it belongs. However, all of these doors must sit on a suitable cill or exterior drainage system. The issue is whether enhanced drainage comes as standard or is not addressed correctly. The integrated sub-drain on the CVS 20 version does away with a well-known issue with water collecting on the Cortizo door track.

Enhanced sealing and protection

The CVS 20 variant of Cortizo Cor Vision sliding doors has another feature that can only been seen to be understood. So good is the sealing on the door set, that the best way to describe this, is that as the door panels pass each other on sliding, they create an air vacuum or air lock.

This is evident when deliberate and unnecessary force is applied to make the doors slide fast along the track (not recommended with any door). Half-way through the exaggerated push and sliding action, the doors slowed down altogether, on their own. This is not some soft-close or anti-slam feature. The weather seals on the door set are so good that they create an air trap between the overlapping and opening panels.

A flush appearance on the inside of the doors

Whilst the Cortizo Cor Vision sliding doors benefit from the 20mm mullion, the thin nature of this means a deeper projection into the room. CVS20, depending on the size are available without the projecting mullion on the inside using an alternative glass specification.

The benefit is a door that looks flatter internally and looks the same viewed from any angle.

Technical Information

Cor-Vision sliding doors are technically excellent and correctly designed and specified offer some great specifications.

  • U-Values of 1.4Wm2K or better depending on the glass specification.
  • Excellent acoustic insulation
  • Air permeability (EN 12207): Class 4
  • Water tightness (EN 12208): Class 7A
  • Wind resistance (EN 12210): Class C5
  • Security tested to the latest standards.
  • Panel sizes of up to 2.5m wide and up to 3.0m high.

Security and Energy Efficiency

Doors come standard with a four-point locking system, with espagnolettes locking into securely fixed keeps. Additional overall door set security is available if you upgrade to a laminated glass specification.

How Much Does a Cortizo Sliding Door Cost?

Here are some approximate prices for Cortizo Cor-Vision sliding doors. With so many retailers nationwide, the prices you can expect to pay will vary. Profit margins, installation costs, material buying power, and business overheads all play a part, not to mention how keen the installer is to secure your business. It is often the case that products in the North of the country are much cheaper than in the South and Home Counties. Sizes, colour, track arrangement, and glass specifications also affect the price you pay. The below are typical sizes and prices for a two-panel door set, double glazed to meet a 1.4Wm2K overall U-Value, supplied and fitted, inclusive of VAT.

2 Panel sliding door XO design 2.7m wide x 2.4m high £6900.00
2 Panel sliding door XO design 4.4m wide x 2.6m high £10200.00
2 Panel sliding door XO design 4.8m wide x 2.4m high £11700.00

Of course, the cost of Cortizo sliding doors also depends on the installation, it’s location, handling glass sliding doors and many other factors. You can get in touch for details of Cortizo manufacturers and installers near you.

Other Doors to compare with Cortizo Cor Vision

There are substantial doors on the market with the 20mm mullion, but alternative products include:

  • Sunflex SVG 20 or SVG 30 sliding doors, also flush stacking design.
  • Sunvista ultra-slim sliding doors.
  • ID Systems Edge 2.0 sliding doors
  • Hyline HY40 sliding doors
  • Minima Sliding Doors

Cortizo Cor-Vision and CVS 20 sliding doors

In conclusion, Cortizo sliding doors, especially the CVS 20 model, represent a minimalist sliding door solution for new-build or replacement door projects. Whether you choose the standard Cor Vision model or the enhanced version in the CVS 20, you’ll get a spectacular sliding door that is technically excellent, secure, and energy-efficient, with the desirable flush track option.

Suitable for residential or commercial properties, Cortizo sliding doors are an excellent choice for those seeking to combine aesthetics, performance, and functionality from one of the most widely used and tried and tested slimline doors with the desirable 20mm mullion.

cortizo sliding doors in a romford glazing showroom, dark grey

Contact us for more information on Cortizo or CVS 20 sliding doors and details of where to view them.

Showroom Pictures from the Brentwood, Loughton and Romford showrooms of Chigwell Window Centre.

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