Cortizo COR 4900 Corredera represents the evolution of sliding windows. If you appreciate the aesthetics of the COR 70 Industrial series but need a sliding design to save space, the 4900 model is your choice. Cortizo engineers increased the frame installation depth to 70 mm (the standard for thermally broken casement windows), significantly improving thermal performance. This is no longer just a "cold aluminium slider" but a fully thermally broken system capable of maintaining comfortable room temperature year-round.
The system design follows the "Hi-Tech" style: sashes and glazing beads have a distinctly rectangular shape without old-fashioned curves. This gives the window a strict, architectural appearance. Thanks to the reinforced sash construction, the system accommodates glazing units up to 36 mm thick. This opens access to quality sound insulation, allowing street noise to be blocked out, something rarely available in more budget sliding series.
Technical Specifications
The benchmark for modern sliding systems (Hi-Tech). Increased installation depth of 70 mm, improved thermal insulation, and strict straight-line design for balcony and terrace glazing.
System Design Parameters:
Glazing Options:
Maximum Dimensions and Mechanics:
Certified Performance:
The benchmark for modern sliding systems (Hi-Tech). Increased installation depth of 70 mm, improved thermal insulation, and strict straight-line design for balcony and terrace glazing.
For a 2-panel sliding system (3000 × 2200 mm) with basic double-glazed unit.
Alternative solutions from other manufacturers
Side by side
How Cortizo 4900 Corredera stacks up against the closest matches from other brands.
| Specification | Cortizo 4900 CorrederaThis profile | Schüco ASE 60 | Rehau Panorama Swing | Kömmerling PremiLine |
|---|---|---|---|---|
| Brand | Cortizo | Schüco | REHAU | Kömmerling |
| Material | Aluminium | Aluminium | PVC | PVC |
| Profile depth | — | — | — | 80 mm (frame) |
| Chambers | — | — | — | — |
| Glass unit, max | up to 36 mm | up to 40mm | up to 40mm | up to 28 mm |
| Thermal (Uw) | ≤ 1.3 | 1,1 | 1.3 | ≤ 1.3 |
| Sound (Rw, dB) | ≈ 40 dB | ≈ 41 dB | — | ≈ 34 Rw(dB) |
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FAQs
The main differences are size and thermal performance. The COR 4900 frame has a depth of 70 mm (versus 60 mm for the 4200), making it warmer and more rigid. The 4900 also features a "square" sash design, whereas the 4200 is more commonly found in rounded or simpler versions.
Yes, thanks to the thermal break and the ability to install warm glazing units (36 mm), the COR 4900 is suitable for heated residential spaces in the Spanish climate. It does not freeze and retains heat well, although it is slightly less airtight than casement windows.
Yes, the system can be mounted on a frame with 3 tracks (tri-rail). This allows three sashes to stack into one group, opening 66% of the aperture width. This is an excellent solution for wide terrace exits.
Water tightness class 7A means the window withstands direct rain impact under wind pressure. This is a very good rating for a sliding construction, achieved through quality drainage and a double brush seal contour.
The mechanism is very reliable, but once a year it is recommended to clean the lower track (rail) of sand and dust with a vacuum cleaner. This will prevent premature roller wear and maintain smooth operation for decades.
Yes, like any classic slider, there is a bottom frame. The threshold height is approximately 45-50 mm. It can be partially recessed into the floor screed during installation to make stepping over more comfortable, but it cannot be completely flush (as in lift-and-slide systems).
