Cortizo Cor Vision vs Cor Vision Plus Sliding: Which Cortizo Slider to Specify

Cortizo's residential sliding range splits into two systems that often appear in the same buying conversation: the Cor Vision Sliding and the premium Cor Vision Plus Sliding. They share the Cortizo hardware ecosystem, the same RAL palette and the same PAS 24:2022 security baseline, but they target different specifications. This guide explains the practical differences and helps you decide which Cortizo slider fits your project.

We install both across Buckinghamshire, Berkshire, Oxfordshire, Surrey, Hampshire, Hertfordshire and West London, so the comparison below is grounded in current quotes we write rather than specification-sheet copy.

Quick Summary

• Cortizo Cor Vision Sliding is the slim residential slider. 34mm interlock between leaves, max sash up to 3m × 2.8m at 400kg per panel. The right specification for most UK rear-extension and patio openings where the architectural priority is glass area without moving up to the Plus tier.
• Cortizo Cor Vision Plus Sliding is the premium slider. 20mm central junction (notably slimmer than Cor Vision's 34mm), max sash 3.3m × 3m at up to 500kg per panel, and accepts glazing up to 54mm thick. The Cortizo equivalent of structural-glass aesthetics at conventional aluminium-slider cost.

Both systems carry PAS 24:2022 certification, both ship with multi-point shootbolt locking, both use anti-lift devices on the running track, and both come with our 10-year CPA insurance-backed installation guarantee. For the canonical Cortizo sliding range page see our Cortizo Sliding Doors hub.

What Is the Central Junction and Why Does It Matter?

On a sliding door, the central interlock is the visible vertical line where two leaves meet when the doors are closed. The narrower the interlock, the closer the closed door reads to a continuous glass plane.

Cor Vision Sliding has a 34mm interlock between leaves, keeping the visible mullion narrow on a slim profile. Most homeowners find this comfortably better than the standard mass-market aluminium slider (typically 60-90mm interlocks) and the right balance between glass area and budget.

Cor Vision Plus reduces this to a 20mm central junction. The 14mm reduction is materially visible from inside the room, particularly on wider openings where the interlock repeats as a vertical line down the middle of the elevation. The eye reads the closed door as a near-frameless panoramic glass plane rather than a slider with a visible mullion.

Sash Size Limits

This is the single biggest practical difference between the two systems.

Cor Vision Sliding - **Max sash: 3m × 2.8m at 400kg per panel** - Suitable for the majority of UK rear-extension and patio apertures - Glazing up to 32mm typical specification

Cor Vision Plus Sliding - **Max sash: 3.3m × 3m at 500kg per panel** - Suitable for very large apertures (typically architect-led contemporary new builds) - **Accepts glazing up to 54mm thick** (triple-glazed Low-E and acoustic-spec laminated combinations both fit)

If your aperture is wider than 3m or taller than 2.8m per leaf, Cor Vision Plus is the only Cortizo standard slider that supports it. If you want triple-glazed acoustic-laminated combinations on the same leaf, Cor Vision Plus is also the system because of the 54mm glazing capacity.

Standard Slider, Not Lift-and-Slide

Both Cor Vision Sliding and Cor Vision Plus Sliding are standard sliders. The leaf rolls horizontally on a precision track and the handle operates the lock without lifting the sash. They are distinct from Cortizo's lift-and-slide systems (4700 Sliding Patio, 4900 Sliding HI), where the handle physically lifts the leaf off the seal before sliding for very heavy or motorised sashes. For Cortizo's lift-and-slide range see our Cortizo Lift-and-Slide hub.

If your project is targeting motorised opening or single sashes much above 500kg, lift-and-slide is the route, not Cor Vision Plus.

Thermal Performance

Both Cortizo sliding systems use thermally broken profiles. With double-glazed Low-E units the whole-window Uw lands in the same band as the rest of the Cortizo aluminium range, comfortably exceeding the Approved Document L 1.4 W/m²K maximum for replacement windows and doors. With triple glazing (Cor Vision Plus only; that's what the 54mm glazing capacity enables) the Uw drops further. Specific Uw is calculated per opening based on the chosen glazing unit, frame size and thermal spec at quote stage.

For projects targeting Passivhaus-grade thermal performance, neither Cor Vision is the spec. Schuco's ASE 80 reaches Passivhaus on the standard slider category and the Schuco ASS 77 PD Panorama lift-and-slide reaches whole-window Uw under 0.8 W/m²K. See our Cortizo vs Schuco comparison for the full thermal-spec ladder.

Security

Both Cor Vision systems carry PAS 24:2022 certification as standard. Hardware specification is shared:

• Multi-point shootbolt locking
• Anti-lift devices on the running track (prevents the leaf being lifted off the rails from outside)
• Internally beaded glazing
• Toughened safety glass throughout (mandatory under Approved Document K within 800mm of finished floor level)
• 3-star TS007 anti-snap, anti-drill, anti-bump cylinder

Secured by Design configurations are available on both systems where insurance underwriters require it. This is the police-led UK security accreditation recognised by premium home insurers including Hiscox, Chubb and AIG Private Client.

Colour and Finish

Both Cor Vision systems offer the full RAL palette as a standard option. Powder-coat finish is applied at the factory, baked at high temperature, and carries Cortizo's standard finish warranty. Common specifications:

• Anthracite Grey (RAL 7016)
• Black (RAL 9005)
• White (RAL 9010)
• Bronze (RAL 8019)
• Dual-colour (different RAL inside vs outside, common on contemporary builds)

Custom RAL is available on both systems at no premium.

When to Choose Cor Vision Sliding

The standard Cor Vision is the right specification for:

• Most residential extensions where the contemporary aesthetic is welcome but not the leading priority
• Apertures up to 3m × 2.8m per leaf
• Double-glazed specifications (32mm glazing typical)
• Budget-conscious projects where the spec premium for Plus is hard to justify
• Replacement projects where matching existing aluminium frame depths matters

When to Choose Cor Vision Plus Sliding

The Plus tier is the right specification for:

• Very large apertures: anywhere a single leaf needs to be wider than 3m or taller than 2.8m
• Sashes heavier than 400kg (triple glazing or thick acoustic-laminated combinations)
• Glazing thicker than 32mm
• Contemporary new builds where the closed-door appearance is part of the architectural language
• Projects targeting the slimmest possible central interlock at the centre of the run

Pricing

Vitrum Solutions is a quote-driven business. We do not publish fixed price tables on Cortizo sliding doors because the cost varies with sash size, panel count, glazing specification, RAL colour, threshold detail and any structural alterations to the existing aperture. The Cor Vision Plus typically carries a modest premium over the standard Cor Vision for the slimmer central junction and the larger sash capacity.

For real 2026 UK installed pricing context see Cortizo Cor Vision Sliding Doors Cost UK. Final price is set after a free no-obligation survey at your property.

Vitrum Solutions and Cortizo

Vitrum Solutions is a Cortizo Approved Installer covering Buckinghamshire, Berkshire, Oxfordshire, Surrey, Hampshire, Hertfordshire and West London. We carry both sliding tiers because the right answer genuinely depends on the aperture, the elevation and the rest of the glazing schedule. Our survey team specifies the correct system at survey rather than defaulting to the higher-margin tier.

Browse the Cortizo brand hub for the full product portfolio (bifolds, sliding, lift-and-slide, casements, Millennium Plus front doors).

Frequently Asked Questions

Cor Vision vs Cor Vision Plus — which sliding system is right for my project?

Use the aperture as the deciding test. If your single leaf is 3m × 2.8m or smaller and the glazing schedule is double-glazed, Cor Vision Sliding is the right specification. The 34mm interlock is already much narrower than mainstream sliders and the spec premium for Plus is hard to justify at that scale. Move to Cor Vision Plus when any one of three project conditions is met: a single leaf needs to exceed 3m wide or 2.8m tall, the glazing schedule includes triple-glazed or acoustic-laminated combinations needing the 54mm capacity, or the closed-door aesthetic on the lead elevation is part of the architectural brief and the 20mm central junction matters as a continuous-glass appearance. Architect-led contemporary new builds usually land on Plus; rear-extension residential refurbishments usually land on standard.

Why isn't Cor Vision a lift-and-slide system?

Cor Vision and Cor Vision Plus are standard sliders by design. The leaf rolls along a precision track, the handle operates the lock, and there is no lift mechanism. Cortizo splits these from the lift-and-slide range deliberately because the use cases differ: standard sliders cover most residential apertures up to 500kg per panel cleanly without the handle-lift action, while lift-and-slide is the spec when sashes get heavier still, when motorisation is required, or when the closed-state air-tightness needs to seat a heavy leaf onto its seal. For projects that need lift-and-slide function, Cortizo offers the 4700 Sliding Patio and 4900 Sliding HI on the Cortizo Lift-and-Slide hub.

Can I have triple glazing on a Cor Vision slider?

Cor Vision Plus accepts glazing up to 54mm thick, which is enough capacity for triple-glazed Low-E units and for thick acoustic-laminated combinations. Cor Vision Sliding's 32mm typical glazing capacity is suitable for double glazing only. If your project specifies triple glazing on the slider, Cor Vision Plus is the system.

What security upgrades are available on Cor Vision Plus?

The standard Cor Vision Plus specification already exceeds PAS 24:2022 with multi-point shootbolt locking, anti-lift devices on the running track, internally beaded glazing, toughened safety glass, and a 3-star TS007 anti-snap, anti-drill, anti-bump cylinder. Where an insurance underwriter or new-build specification requires it, the upgrade path is a Secured by Design configuration which locks the cylinder, hardware set, hinge spec, strike plates and a laminated inner glass pane to a tighter configuration audited by police-recognised testing. For projects targeting BS EN 1627 RC2 burglar resistance the right alternative is the Schuco ASS 77 PD Panorama lift-and-slide. Cor Vision Plus is not BS EN 1627 tested. See What Is Secured by Design.

How does Cor Vision Plus compare to Schuco's premium sliding tier?

The honest head-to-head pairs Cortizo's premium standard slider against Schuco's premium lift-and-slide tier. Cor Vision Plus offers the slimmer central junction (20mm vs Schuco ASS 77 PD's 30mm) and matches sash capacity (3300×3000mm at 500kg vs 3200×3000mm at 500kg). Schuco wins on thermal: ASS 77 PD reaches whole-window Uw under 0.8 W/m²K (Passivhaus-grade) where Cor Vision Plus on a typical double-glazed spec sits in the standard A-rated band, and Schuco's ASE 80 standard slider also reaches Passivhaus thermal where Cor Vision does not. Schuco also wins on the lift-and-slide mechanism, relevant where motorised or 500kg-sash daily operation matters. Where insurance requires DIN EN 1627 RC2 certification specifically, ASS 77 PD is the Schuco-side answer (Cor Vision Plus is not BS EN 1627 tested, as noted above). The Cortizo Cor Vision Plus answer is the slimmest closed-door appearance at conventional A-rated thermal; the Schuco ASS 77 PD answer is Passivhaus thermal plus lift-and-slide engineering at a slightly heavier central junction. See Cortizo vs Schuco.

What is the maximum aperture you can fit a Cor Vision slider into?

Maximum aperture depends on panel count and configuration (2-panel, 3-panel, 4-panel, with one or more fixed leaves). Cor Vision Plus's 3.3m × 3m max-sash limit means a 4-panel configuration can span apertures over 12m wide. The exact dimensions for your opening are confirmed at the survey stage.

Where is Cor Vision manufactured and what's the UK lead time?

Cor Vision Sliding and Cor Vision Plus Sliding are manufactured in Cortizo's facilities in northwestern Spain and shipped through the Cortizo UK fabricator network. The sliders are made-to-order (there is no off-the-shelf stock), so the UK lead time runs from the date the order is placed with the fabricator. In 2026 the typical lead time on a residential Cor Vision order is several weeks from order placement to delivery on site, with the exact figure confirmed at quote stage based on current Cortizo UK fabricator volume and any specific spec items (custom RAL, triple glazing, motorised hardware) that affect the production schedule.

Getting a Quote

Vitrum Solutions installs both Cortizo Cor Vision Sliding and Cor Vision Plus Sliding across Buckinghamshire, Berkshire, Oxfordshire, Surrey, Hampshire, Hertfordshire and West London. Request a free quote and we will provide a written itemised price for both systems so you can compare directly.

For more on Cortizo specifically see Cortizo Sliding Doors Review and Cortizo Aluminium Windows Review. For the full Cortizo bifold-vs-bifold-plus comparison see Cortizo Bi-Fold vs Bi-fold Plus Door.