WDS 6S — a step up in comfort that anyone can afford. Where the 5S series is the entry-level option, 6S is an investment in your home's indoor climate. Its 70 mm installation width and 6 air chambers deliver thermal insulation that goes beyond Spanish building codes (CTE) across most climate zones.
Why spend 15-20% more than on basic windows?
This is what level-headed homeowners choose when they want premium-tier features (on par with German brands) without paying a premium for a well-known name.
Brand
WDS — modern window systems combining European quality and affordable prices. The manufacturer uses German technology and strict quality control, offering a wide range of profiles: from economical 5S to flagship 8S at Passivhaus level.
More about WDSTechnical Specifications
The benchmark in glazing. A 6-chamber 70mm system with enhanced sound insulation.
Engineering Specifications:
Glass Filling Choices:
Largest Build Sizes:
Tested Performance:
Documentation
The benchmark in glazing. A 6-chamber 70mm system with enhanced sound insulation.
For a standard 2-sash tilt-and-turn window (1200 × 1400 mm) with basic double-glazed unit.
Alternative solutions from other manufacturers
Side by side
How WDS 6S (70 mm) stacks up against the closest matches from other brands.
| Specification | WDS 6S (70 mm)This profile | Rehau Euro-design 70 | Veka Softline 70 | Schüco Corona CT 70 |
|---|---|---|---|---|
| Brand | WDS | REHAU | VEKA | Schüco |
| Material | PVC | PVC | PVC | PVC |
| Profile depth | 70mm | 70mm | 70mm | 70mm |
| Chambers | 6 chambers | 5 chambers | 5 chambers | 5 chambers |
| Glass unit, max | up to 40mm | up to 40mm | up to 42mm | up to 52mm |
| Thermal (Uw) | 1.3 | 1.3 | 1.3 | 1.3 |
| Sound (Rw, dB) | ≈40 Rw(dB) | ≈43 Rw(dB) | ≈45 Rw(dB) | ≈48 Rw(dB) |
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FAQs
WDS 6S is a 70 mm, 6-chamber PVC system with a 113 mm profile height. Key figures:
The 70 mm depth allows glazing up to 40 mm thick. In practice that means energy-saving double-chamber units (standard 32 mm or 40 mm) filled with argon and low-E glass. The extra width of the cavities and the second glass chamber are what push the assembly to Uw ≤ 1.3 W/(m²·K) and improve sound damping over a thinner unit.
It is a 70 mm class, not a panoramic system. The maximum single sash is 1000 mm wide for a window (900 mm for a balcony door) and 2300 mm high, and the full height only with heavier steel reinforcement. For larger openings or very heavy panes you should step up to a deeper profile such as WDS 76 MD or WDS 8S rather than oversize a 6S sash.
WDS 6S sits in the mid-tier. Moving up the range narrows the U-value:
Yes. The steel reinforcement profile inside the frame is designed to accept anti-burglary hardware and strike plates fixed directly into the steel. This lets the window be upgraded beyond standard fittings for ground-floor or accessible openings, using the same reinforcement that already carries the wind load and the heavier sash sizes.
Yes. Tested performance gives a heat resistance value (Ro) of up to 0.89 m²°C/W, which surpasses state norms for the first climate zone, and the profile heat retention is Uf ≈ 1.2 W/m²K. Combined with energy-saving argon and low-E glazing the window is rated energy class A with Uw ≤ 1.3 W/(m²·K).
