Cortizo COR 4900 Corredera marks the next step in the evolution of sliding windows. If you love the look of the COR 70 Industrial series but need a sliding format to save space, the 4900 is your match. Cortizo's engineers raised the frame installation depth to 70 mm (the benchmark for thermally broken casement windows), markedly boosting thermal performance. This is no longer a mere "cold aluminium slider" but a fully thermally broken system able to hold a comfortable room temperature all year long.
The design embraces the "Hi-Tech" aesthetic: sashes and glazing beads take on a pronounced rectangular form with no dated curves. The result is a window with a strict, architectural character. Thanks to its reinforced sash construction, the system takes glazing units up to 36 mm thick. That opens the door to genuine sound insulation and the ability to keep street noise out, a feature seldom found in more budget-oriented sliding ranges.
Brand
Cortizo is the flagship of Spanish industry with headquarters in Galicia. The brand is famous for Cor Vision aluminum systems with virtually invisible profiles. If you need panoramic glazing for a villa or modern home — Cortizo is unrivaled.
More about CortizoTechnical Specifications
A yardstick for modern Hi-Tech sliders. A deeper 70 mm build, stronger thermal insulation and a strict, straight-edged design make it ideal for glazing balconies and terraces.
Engineering Specifications:
Glazing Choices:
Largest Sizes and Mechanics:
Tested Performance:
A yardstick for modern Hi-Tech sliders. A deeper 70 mm build, stronger thermal insulation and a strict, straight-edged design make it ideal for glazing balconies and terraces.
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) |
See all sliding profiles compared.
Open full comparisonLeave a Review
Find out what people are saying about it
No reviews yet. Be the first!
PVC and aluminium are the two frames you will be quoted for almost every window in Spain, and the right answer changes from Valencia to Vigo. This guide compares them head-to-head on insulation, price per m², coastal durability, sizes, colours and noise, then gives a clear verdict by scenario and region.
Aluminium is Spain's home-team window material — and the customs data shows why. Spain net-exports roughly $1.2 billion of aluminium extrusions and finished windows a year, shipping to France, the UK and Latin America, led by Galician giants like Cortizo. A full data report on the aluminium value chain, who makes it, the thermal-break problem, and where PVC is eating in.
Corredera, lift-and-slide, folding or minimalist — Spain's terrace doors come in very different forms, and the wrong choice means draughts, trip hazards or a door you can barely move. This guide walks through the types, thermal performance, thresholds, security and realistic 2026 prices so you can compare quotes with confidence.
Floor-to-ceiling glass and near-frameless sliding walls turn Spanish living rooms into light-filled spaces with uninterrupted views. But large-format glazing brings real questions about solar heat, structure, security and cost. Here's how panoramic systems work and how to specify them well in Spain's climate.
Frameless glass curtains, framed enclosures, sliding and folding glass, thermal vs non-thermal systems — this guide explains how to close a terrace in Spain, what it costs per m², and the community-of-owners rules that catch buyers out. Compare verified enclosure specialists on Estimia.
Triple glazing is the default in the Alps and Scandinavia, but in Spain it only pays off in the right climate. This guide explains what triple glazing actually does, where in Spain it makes sense (the cold interior and mountains), where it is a waste of money, and exactly what to specify — so you can compare like-for-like quotes from verified companies on Estimia.
FAQs
Each sliding sash runs up to 2200 mm wide and 2600 mm tall, carrying glass weights of up to 120 kg as standard or up to 140 kg with reinforced rollers. That headroom suits full-height balcony and terrace glazing, with effortless gliding on a replaceable stainless steel running track.
The 48 mm sash accepts units up to 36 mm, so triple glazing, acoustic laminated glass and multifunctional glass all fit. Combined with the 70 mm RPT frame and broad polyamide thermal breaks, it reaches a Uw of ≤ 1.3 W/m²K and acoustic damping of up to 40 dB, depending on the glass unit chosen.
Tested figures put it among the stronger inline sliders: watertightness Class 7A, air tightness Class 3 and wind load Class C5. Premium brush (pile) seals with a polypropylene "Fin-Seal" fin block draughts, while engineered drainage channels clear driven rain from the bottom track.
It is the heavier-duty, warmer choice. The 4900 has a 70 mm frame versus the 4200's 60 mm, takes 36 mm glazing against 26 mm, and hits Uw ≤ 1.3 versus the 4200's ≤ 1.6 W/m²K, with around 40 dB against 38 dB acoustic damping.
The 4900 is a classic inline slider with a bottom rail and visible sash frames, so it is not the pick for frameless sightlines or step-free thresholds. For ultra-slim profiles consider COR Vision or COR Vision PLUS (Uw down to 0.9 W/m²K); for very large, heavy lift-slide panels the E 170 is built for it.
Yes. The sash is offered in Hi-Tech (square corners) or Curva (rounded), with the straight-edged Hi-Tech look taken as standard. The system is built on aluminium alloy 6063 T5 and can be specified with multi-point mushroom-cam locking for added security on terrace and balcony openings.
