What is the price difference between APX20 Plus and Cortizo Vision?

In London (Q2 2026), APX20 Plus is typically 15-20% cheaper than Cortizo Vision for the same opening. A 3-pane installation in a 3m × 2.1m opening fits at £6,000-£9,000 (APX20 Plus) vs £7,200-£10,800 (Cortizo Vision). The price gap widens on larger openings because Vision can use single panes up to 3000mm × 2200mm where APX20 Plus needs to split into more panes above 2700mm.

Can APX20 Plus do a hidden floor track?

No. APX20 Plus uses a low-profile threshold (around 25mm above floor level) but doesn't offer a fully recessed in-floor hidden track. Cortizo Vision offers a hidden track option where the bottom rail sits flush in the floor screed, visually no threshold at all. If a hidden track is non-negotiable, Vision is the choice.

Which has the better acoustic rating, APX20 Plus or Cortizo Vision?

Cortizo Vision tests at 42 dB Rw with standard double glazing (acoustic-spec laminated glass takes it to 45 dB). APX20 Plus tests at 38 dB Rw. The 4 dB difference is meaningful in noise-exposed locations, flight paths near Heathrow, A4 in Chiswick, A406 in Hammersmith, but inaudible in quieter residential streets.

Which goes higher, APX20 Plus or Cortizo Vision?

Cortizo Vision panes go up to 3000mm tall at 320kg per pane. APX20 Plus tops out at 2700mm and 280kg. For double-height openings (London Crittall-style rear extensions often spec 2.7m-3.0m tall doors), Vision is functionally the only option of the two.

Are both PAS 24 security rated?

Yes. Both Cortizo Vision and APX20 Plus carry PAS 24:2022 certification with multi-point hook locks, anti-lift blocks, and laminated security glass as standard. Both are accepted by UK home insurance and meet Document Q new-build security requirements.

Should I save money with APX20 Plus or pay for Cortizo Vision?

For openings under 2.7m tall, with a low (not flush) threshold, in a typical residential noise environment, APX20 Plus delivers an essentially identical visual result for 15-20% less money. Pay for Cortizo Vision when any one of these applies: panes need to exceed 2700mm tall, you want a hidden in-floor track, you're on a noise-exposed road, the brief specifies dual-colour finishes, or the architect has named the system on the drawings.

APX20 Plus vs Cortizo Vision | Two 20mm Sliders Compared

Q: Is APX20 Plus the same as Cortizo Vision?

No. Both share the headline 20mm interlock and similar U-values, but they're different systems. Cortizo Vision is the Spanish-engineered original, with 3000mm panes, 320kg pane support, hidden in-floor track, and 42 dB acoustic. APX20 Plus is the value-engineered UK alternative, 2700mm panes, 280kg, no hidden track, 38 dB acoustic, at typically 15-20% lower fitted price.

Same headline number, different system

These are two systems from the same Cortizo family, and they are not the same product with a different badge. APX20 Plus is Apex's build of COR Vision Plus Sliding, published with a 25mm central junction. COR Vision Sliding is the narrower system, published at 20mm. The 5mm you gain at the junction on COR Vision costs you a great deal of structural capacity, and the 5mm you give up on APX20 Plus buys sashes nearly twice as large and a much lower U-value. This page is the honest breakdown, system to system.

Side-by-side spec table

Manufacturer-published figures for both systems. APX20 Plus is Apex's build of Cortizo COR Vision Plus Sliding; COR Vision Sliding is the separate, narrower-junction system in the same Cortizo family. Blank cells are figures the manufacturer does not publish, left blank rather than estimated.

Spec	APX20 Plus (COR Vision Plus Sliding)	COR Vision Sliding
Central junction	25 mm	20 mm
Sash depth	69 mm	37 mm
Frame depth	180 / 278 mm	116 / 182 mm
U-value, from	0.9 W/m²K	1.3 W/m²K
Max sash width	4000 mm	2500 mm
Max sash height	4000 mm	3000 mm
Max sash weight	400 kg manual, 700 kg motorised	320 kg
Max glazed area	14 m²	,
Glazing thickness	36 to 56 mm	26 to 30 mm
Acoustic Rw, up to	43 dB	41 dB
Air permeability	Class 4	Class 4
Watertightness	Class 9A	Class 7A
Wind resistance	Class C4	Class C5
Glass to frame ratio	Up to 94%	,
Security	PAS 24 available	PAS 24 available
Finishes	Any RAL colour	Any RAL colour
Guarantee	10 yr	10 yr

Sources: Apex APX20 Plus product data sheet, and Cortizo COR Vision Plus Sliding and COR Vision Sliding published system data.

Where the systems diverge

These are two different Cortizo systems, not two tiers of one. The junction width goes one way and almost everything structural goes the other. These are the real decision points.

Difference	APX20 Plus (COR Vision Plus)	COR Vision Sliding
Central junction	25 mm	20 mm, the narrower of the two
Sash capacity	4000 × 4000 mm at 400 kg by hand, 700 kg motorised	2500 × 3000 mm at 320 kg
Thermal performance	Published from 0.9 W/m²K	Published from 1.3 W/m²K
Glazing capacity	36 to 56 mm, takes a full triple-glazed unit	26 to 30 mm
Weathering	Class 4 air, 9A water, C4 wind	Class 4 air, 7A water, C5 wind
Sash section on view	69 mm sash depth	37 mm sash depth, the slimmer read

Choose APX20 Plus if…

APX20 Plus is Apex's build of Cortizo COR Vision Plus Sliding. It gives up 5mm at the junction and takes a great deal more glass in exchange.

A single sash needs to exceed 2500mm wide or 3000mm high

Sash weight goes above 320kg, this system is published to 400kg by hand

You want motorised operation, published to 700kg per sash

You want a lower U-value, published from 0.9 W/m²K against 1.3

You need thicker glazing, 36 to 56mm rather than 26 to 30mm

Watertightness matters, published Class 9A against Class 7A

A 25mm junction rather than 20mm is an acceptable trade for all of the above

Choose COR Vision Sliding if…

COR Vision Sliding is the narrow-junction system. Choose it when the sightline is the point and the sashes sit inside its published limits.

The 20mm junction is the brief, and 25mm would undermine it

Each sash sits inside 2500mm wide × 3000mm high and 320kg

Glazing of 26 to 30mm is enough for the thermal and acoustic target

The architect has named Cortizo COR Vision on the drawings

You want the slimmest possible sash section, 37mm on this system

Frequently asked

Is APX20 Plus the same as Cortizo Vision?

Not quite, and the difference matters. APX20 Plus is Apex's build of Cortizo COR Vision Plus Sliding, published with a 25mm central junction, sashes to 4000 × 4000mm at 400kg by hand or 700kg motorised, glazing from 36 to 56mm and a U-value from 0.9 W/m²K. COR Vision Sliding is a separate system in the same family, published with a 20mm central junction, sashes to 2500 × 3000mm at 320kg, glazing 26 to 30mm and a U-value from 1.3 W/m²K.

Which one has the 20mm junction?

COR Vision Sliding. Apex fits that system as APX20 Ultra Slim, published at a 20mm flush central interlock with a 37mm sash and a U-value from 1.3 W/m²K. APX20 Plus is the larger COR Vision Plus system at 25mm. If you have been told that APX20 Plus is a 20mm door, that is a mix-up between two systems that share a number in their name.

What is the price difference?

Both are made to order, so the fitted cost turns on the structural opening, the number of panes, the glass specification, the threshold detail, the colour and site access. We quote after a survey rather than from a list. The more useful thing we can tell you before the survey is which of the two your sash sizes actually allow, because above 2500mm wide or 320kg the choice is made for you.

Which is better thermally?

APX20 Plus, and by a clear margin. Cortizo publishes it from 0.9 W/m²K against 1.3 W/m²K for COR Vision Sliding. The reason is glazing capacity: the 69mm sash on COR Vision Plus takes units from 36 to 56mm, deep enough for a full triple-glazed make-up, where the 37mm sash on COR Vision Sliding takes 26 to 30mm. Both are inside the Approved Document L limit of 1.4 W/m²K for a replacement door.

Which handles bigger openings?

APX20 Plus. Cortizo publishes a maximum sash of 4000 × 4000mm carrying up to 14m² of glass, at 400kg operated by hand or 700kg on the motorised system. COR Vision Sliding is published to 2500 × 3000mm at 320kg. For a double-height rear extension, or any opening where a single sash would otherwise have to be split, APX20 Plus is the system that does it.

Are both PAS 24?

PAS 24 is available on both, and Cortizo publishes a passed PAS 24 security test across its sliding range. As with any door, PAS 24 is a specification you order the unit to rather than something every configuration carries by default, so it should be written on the quote. Approved Document Q applies to easily accessible openings in new dwellings.

So which should I choose?

Start with the sash schedule, not the brochure. If every sash fits inside 2500mm wide, 3000mm high and 320kg, and the 20mm junction is what the brief is really about, COR Vision Sliding is the right call. If any sash exceeds those figures, or you want the lower U-value, thicker glazing, Class 9A watertightness or motorised operation, APX20 Plus is the system, and you accept 25mm at the junction instead of 20mm.

APX20 Plus vs Cortizo Vision