UW- value ≤ 1.3
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.
Article number
300.400.002
Technical Specifications
Details
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.
Energy Efficiency
A / A+
System Type
Sliding (Hi-Tech)
Material
Aluminium RPT
Frame Depth
70 mm
Max. Glazing
up to 36 mm
Thermal Protection (Uw)
≤ 1.3 W/(m2K)
Sound Insulation
≈ 40 dB
System Design Parameters:
- Installation Depth: Frame - 70 mm (2 tracks), 126 mm (3 tracks). Sash - 48 mm.
- Opening Type: Classic sliding (Inline).
- Sash Design: Hi-Tech (square corners) or Curva (rounded) - by choice, but straight design is considered standard.
- Thermal Insulation: RPT technology. Wide polyamide inserts (thermal bridges) in frame and sash for cold isolation.
- Material: Aluminium alloy 6063 T5.
- Tracks: Replaceable stainless steel track for smooth operation and durability.
- Sealing: High-quality brush seals (pile) with polypropylene "Fin-Seal" fin for draught protection.
Glazing Options:
- Maximum Glazing Thickness: up to 36 mm.
- Glazing Types: Triple glazing units, acoustic laminated glass, multifunctional glass.
Maximum Dimensions and Mechanics:
- Maximum Sash Dimensions: Width up to 2200 mm, Height up to 2600 mm.
- Sash Weight: up to 120 kg (standard), up to 140 kg (reinforced rollers).
- Security: Option for multi-point locking (mushroom cams).
Certified Performance:
- Window Thermal Insulation (Uw): up to 1.3 W/m2K (depending on glazing unit).
- Water Tightness: Class 7A (excellent rating for sliding systems).
- Air Permeability: Class 3.
- Wind Resistance: Class C5.
- Sound Insulation: up to 40 dB.
Silence
Enhanced Acoustics
Aesthetics
Hi-Tech Design
Mechanics
Smooth Operation
Cortizo 4900 Corredera
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.
Estimated manufacturing time 3-6 weeks.
Available Services
Free measurement and design More details
Delivery to installation site More details
Installation by our specialists More details
Buy by Phone
Call us Monday to Saturday, except holidays, from 8:00 AM to 10:00 PM. Sundays and holidays from 10:00 AM to 8:00 PM. Call
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Financing Options
Enjoy your purchase now and pay for it in installments using our financing services.
More detailsDon't Forget to Add
Additional elements and accessories that will make your home even more comfortable
Mosquito Nets
Protect your home from insects, dust, and pollen, allowing you to enjoy fresh air even in the middle of summer.
Handles and Locking Elements
Quality hardware ensures ease of use and security for your windows and doors.
Lamination
Colorful home facades and the desire to decorate your home leads to growing demand for laminated windows every year.
Decorative Elements
Decorative strips and bars allow you to give your windows an individual style, emphasizing the architectural features of your home.
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UW- value ≤ 1.3
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Energy Efficiency
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Material
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Profile Depth
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Insulation
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Glazing
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Thermal Protection (Uw)
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Energy Efficiency
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Material
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Profile Depth
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Insulation
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Thermal Protection (Uw)
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Sound Insulation
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Energy efficiency
A / A+
Material
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Profile depth
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Insulation
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Glazing unit
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Thermal protection (Uw)
≤ 1.0 W/(m²·K)
Sound insulation
≈ 44 Rw(dB)
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Energy Efficiency
A
System Type
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Material
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Frame Depth
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Max. Glazing
up to 40mm
Thermal Protection (Uw)
≤ 1.1 W/(m²·K)
Sound Insulation
≈ 41 dB
UW- value 0,80
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Passive house aesthetics. Highly insulated sliding system with 80 mm sash depth for maximum energy efficiency.
Energy Efficiency
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System Type
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Material
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Frame Depth
180mm
Max. Glazing
up to 60mm
Thermal Protection (Uw)
≤ 0.80 W/(m²·K)
Sound Insulation
≈ 43 dB
UW- value 1,0
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Energy Efficiency
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System Type
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Material
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Frame Depth
180mm
Max. Glazing
up to 49mm
Thermal Protection (Uw)
≤ 1.0 W/(m²·K)
Sound Insulation
≈ 46 dB
Available in Your Region
We work throughout Spain
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FAQs
Frequently Asked Questions about Cortizo 4900 Corredera
What is the main difference between COR 4900 and COR 4200?
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.
Is this system sufficient for a living room?
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.
Can all sashes be made to slide apart?
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.
How watertight is this system in heavy rain?
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.
Do the rollers need maintenance?
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.
Does this system have a threshold?
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).
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