Cortizo Sliding Doors Review: COR-Vision Performance & Pricing

Cortizo has quietly become one of the most respected aluminium systems brands in the UK market. While Schuco dominates the premium conversation, Cortizo offers comparable performance at a more accessible price point — and nowhere is this more apparent than with their COR-Vision sliding door system. This review covers everything you need to know before specifying Cortizo sliding doors for your project.

Who is Cortizo?

Cortizo is a Spanish aluminium systems company founded in 1972, headquartered in A Coruña, Galicia. They are one of the largest aluminium extruders in Europe, operating their own smelting, extrusion, powder coating, and anodising facilities. This vertical integration gives them quality control that few competitors can match — the aluminium in your Cortizo door starts as raw material in a Cortizo foundry and is finished in a Cortizo coating plant.

In the UK, Cortizo has gained significant market share over the past decade, particularly in the residential sliding door and bifold door sectors. Their appeal is straightforward: European engineering and testing to the same standards as Schuco, but at price points typically 20-30% lower.

The COR-Vision Sliding Door System

COR-Vision is Cortizo's flagship sliding door range, designed specifically for large-format openings where maximum glass area and minimal frame visibility are priorities. The system is available in several configurations:

COR-Vision (Standard) - **Sightlines:** 20mm at the meeting point (where two panels overlap) - **Maximum panel size:** Up to 3m wide x 2.8m high - **Maximum weight per panel:** 400kg - **Track options:** 2-rail, 3-rail, or 4-rail configurations - **Opening types:** Slide, lift-and-slide, tilt-and-slide

COR-Vision Plus - **Enhanced thermal break** for improved U-values - **Sightlines:** 35mm at the meeting point (slightly wider for better insulation) - **Maximum panel size:** Up to 3.3m wide x 3m high - **Maximum weight per panel:** 500kg

COR-Vision Panoramic - **Slimmest sightlines** in the range — just 20mm - **Designed for maximum glass area** - **Flush threshold option** for seamless indoor-outdoor transitions - **Ideal for contemporary new builds and extensions

Thermal Performance

Thermal performance is where Cortizo COR-Vision competes directly with systems costing significantly more. The key metric is the U-value — the rate of heat transfer through the door, measured in W/m²K. Lower is better.

| System | U-value (Double Glazing) | U-value (Triple Glazing) | |---|---|---| | COR-Vision Standard | 1.5 W/m²K | 1.1 W/m²K | | COR-Vision Plus | 1.3 W/m²K | 0.9 W/m²K | | Schuco ASS 77 PD | 1.3 W/m²K | 0.9 W/m²K | | Budget aluminium sliding | 2.0+ W/m²K | 1.5+ W/m²K |

The COR-Vision Plus achieves U-values from 1.3 W/m²K with double glazing, which matches the Schuco ASS 77 PD — widely regarded as the benchmark for premium sliding doors. With triple glazing, the COR-Vision Plus drops to 0.9 W/m²K, comfortably exceeding current Building Regulations and meeting the anticipated Future Homes Standard requirements.

This performance is achieved through Cortizo's polyamide thermal break technology. The aluminium frame is split into two sections (interior and exterior) connected by reinforced polyamide strips that prevent thermal bridging. The result is an aluminium door that insulates almost as well as a timber frame, without the maintenance requirements.

The 20mm Sightlines Explained

Sightlines — the visible width of aluminium when the door is closed — are one of the most important aesthetic considerations for sliding doors. Narrower sightlines mean more glass and less frame, creating a more expansive view.

The COR-Vision achieves 20mm sightlines at the meeting point of two panels. To put this in context:

• Budget aluminium sliding doors: 50-80mm sightlines
• Mid-range systems: 30-40mm sightlines
• COR-Vision: 20mm sightlines
• Frameless glass systems: 0mm (but with significant cost and thermal penalties)

At 20mm, the aluminium frame becomes almost invisible from normal viewing distances. The visual impact is dramatic — particularly in large openings of 4m or more, where bulky frames can significantly reduce the sense of openness that sliding doors are supposed to provide.

When comparing to aluminium bifold doors, sliding doors inherently offer slimmer sightlines because the panels stack behind each other rather than folding into a concertina. This is one of the key reasons many architects and homeowners now prefer sliding doors over bifolds for contemporary projects.

Security Ratings

Cortizo COR-Vision doors achieve PAS 24:2022 certification, the same security standard required for Schuco systems and specified by Secured by Design. The security features include:

• Multi-point locking with hook locks at top and bottom
• Anti-lift devices preventing the panel from being lifted out of the track
• Reinforced meeting stiles to resist forced entry at the panel overlap
• Optional laminated inner pane for enhanced impact resistance
• Cylinder protection against lock snapping

For ground-floor installations and areas with higher security requirements, you can specify upgraded security glass (laminated inner pane) without affecting the door's appearance or operation. The locking hardware is concealed within the frame profile, maintaining the clean aesthetic.

Colour Options

Cortizo doors are powder-coated at Cortizo's own plant in Spain, which ensures consistent quality across the range. Standard options include:

Standard RAL Colours (no surcharge) - **Anthracite Grey** (RAL 7016) — the most popular choice by a significant margin - **Matt Black** (RAL 9005) — increasingly popular for contemporary projects - **White** (RAL 9010/9016) — standard for traditional or coastal properties - **Silver Grey** (RAL 9006) — metallic finish

Extended RAL Range Any RAL colour can be specified at additional cost, with a typical surcharge of £300-£600 depending on the order size. Popular non-standard choices include:

• Bronze (RAL 8014/8017) — warm, heritage-appropriate tone
• Basalt Grey (RAL 7012) — darker, industrial aesthetic
• Signal White (RAL 9003) — brighter, cooler white than standard

Dual Colour Different colours on interior and exterior faces are available at additional cost. This allows a contemporary Anthracite Grey exterior with a lighter interior to match your room scheme.

Anodised Finishes Cortizo also offers anodised finishes (natural, bronze, black) for projects where the metallic lustre of anodised aluminium is preferred over powder coating. Anodised finishes are more scratch-resistant but offer a more limited colour range.

Cost Guide: What You Will Pay in 2026

Cortizo COR-Vision sliding doors represent excellent value in the premium aluminium sliding door market. Here are realistic fully installed prices for 2026, including structural support, building regulations, and FENSA certification:

| Configuration | COR-Vision | COR-Vision Plus | Schuco ASS 77 | |---|---|---|---| | 2-panel (2m opening) | £3,500–£4,500 | £4,000–£5,200 | £5,000–£6,500 | | 2-panel (3m opening) | £4,500–£6,000 | £5,200–£7,000 | £6,500–£8,500 | | 3-panel (4m opening) | £6,000–£8,000 | £7,000–£9,500 | £8,500–£11,000 | | 4-panel (6m opening) | £9,000–£12,000 | £10,500–£14,000 | £13,000–£17,000 |

The cost saving over Schuco is typically 20-30% for equivalent specifications. This is partly because Cortizo's vertically integrated manufacturing keeps material costs lower, and partly because Cortizo's UK distribution network is more competitive.

Important cost factors include:

• Triple glazing adds 15-25% to the glass cost over double glazing
• Non-standard colours add £300-£600 to the total
• Structural work (removing load-bearing walls, installing steel beams) is separate and can add £2,000-£5,000 depending on the property
• Flush thresholds add £200-£400 per door

How COR-Vision Compares to Competitors

Cortizo vs Schuco Sliding Doors

This is the comparison most homeowners research. In summary: Cortizo COR-Vision Plus matches Schuco ASS 77 PD on thermal performance and security, with comparable sightlines and maximum panel sizes. Schuco offers a wider overall product range and more smart-home integration options. Cortizo wins on price — typically 20-30% less for equivalent specifications. For a detailed comparison, read our Cortizo vs Schuco guide.

Cortizo vs Origin Sliding Doors

Origin is a UK-based brand with strong marketing presence but more limited engineering depth. Origin sliding doors use simpler thermal break designs and achieve higher (worse) U-values than COR-Vision. Sightlines are also wider. However, Origin offers a 20-year guarantee and fast lead times. COR-Vision is the better technical product; Origin may suit projects where speed and simplicity are priorities.

Cortizo vs Budget Aluminium

Budget aluminium sliding doors from brands like Smart Systems or Aluk are significantly cheaper but compromise on thermal performance (U-values above 2.0), sightlines (40mm+), and security (not always PAS 24 certified). For a standard extension where cost is the primary driver, they serve a purpose. For a premium project where the doors are a focal point, COR-Vision is worth the investment.

Installation and Aftercare

Cortizo sliding doors should be installed by fabricators with specific experience in the COR-Vision system. The precision engineering of slim-sightline sliding doors means installation tolerances are tight — even a 2-3mm error in the structural opening can affect panel alignment and smooth operation.

At Vitrum Solutions, we are approved Cortizo installers and have fitted hundreds of COR-Vision sliding doors across Buckinghamshire, Berkshire, and West London. Every installation includes:

• Free home survey with detailed measurements
• Structural advice (and referral to our partner structural engineers where needed)
• Full installation with FENSA certification
• 10-year insurance-backed guarantee
• Post-installation adjustment visit after 3 months

Frequently Asked Questions

Are Cortizo sliding doors as good as Schuco?

For most residential applications, yes. The COR-Vision Plus system matches the Schuco ASS 77 PD on thermal performance (U-values from 1.3 W/m²K), security (PAS 24), and sightlines. Schuco offers advantages in very large commercial projects and smart-home integration. For a typical UK home extension or renovation, COR-Vision delivers equivalent performance at 20-30% lower cost.

What is the maximum size for a Cortizo COR-Vision sliding door?

Individual panels can be up to 3.3m wide and 3m high in the COR-Vision Plus system, with a maximum weight of 500kg per panel. Multi-panel configurations on 3 or 4 rails can span openings of 8m or more. For openings beyond these limits, custom engineering solutions are available.

How much do Cortizo sliding doors cost in the UK?

Fully installed prices for Cortizo COR-Vision sliding doors typically range from £3,500 for a small 2-panel door to £14,000+ for a large 4-panel configuration with triple glazing. The COR-Vision Plus system (better thermal performance) costs approximately 15-20% more than the standard COR-Vision. All prices include supply, installation, and FENSA certification.

Do Cortizo sliding doors have a flush threshold?

Yes. COR-Vision doors are available with a flush threshold option that sits level with the interior and exterior floor surfaces, creating a seamless transition. This requires careful specification during the building phase to ensure drainage is correctly detailed. A flush threshold adds approximately £200-£400 to the cost.

What guarantee do Cortizo sliding doors come with?

Cortizo provides a 10-year manufacturer's guarantee on the aluminium profiles and powder-coated finish. At Vitrum Solutions, we add our own 10-year insurance-backed guarantee covering the fabrication, glazing, and installation. The moving hardware typically carries a 5-year guarantee, though quality components last significantly longer with basic maintenance (annual lubrication of tracks and rollers).