UW- value 1.3

WDS SL 76 — Erases the boundary between home and garden. This is an innovative Smart Slide class system (Airtight sliding) that combines the advantages of two worlds: the convenience of sliding doors and the complete airtightness of classic casement windows.

What's revolutionary?

In regular sliders, brushes are used that let air through. WDS SL 76 uses a continuous rubber sealing circuit. When the handle turns, the sash shifts perpendicular to the frame and presses tightly against the gasket on all 4 sides.

Result:

  • You can install such doors in heated living rooms, bedrooms, and children's rooms — there will be no drafts.
  • Perfect protection from driving rain and storm winds (DANA), common on Spain's coast.
  • Ability to create huge panoramic sashes (up to 3 meters wide) that open with one finger.

Technical Specifications

Details

Slider-window hybrid. 100% airtightness thanks to smart sash pressing around the entire perimeter.

Energy rating
A
System type
Airtight (Smart)
Profile depth
76 mm
Chambers
5 chambers
Glass unit
up to 48 mm
Thermal protection
Uw ≤ 1.3 W/(m²·K)
Sound insulation
≈45 dB

System Design Parameters:

  • Installation depth: 150 mm (frame) / 76 mm (sash).
  • Opening type: Parallel-sliding (sash exits the plane and smoothly slides behind the fixed part).
  • Profile construction: 5-chamber frame and 5-chamber sash, providing high thermal performance.
  • Airtightness: Unlike classic sliders, high-quality perimeter sealing (not brushes) is used here, eliminating drafts.
  • Threshold: Specialized aluminum track with thermal break for floor freeze protection.

Glazing Options:

  • Maximum filling thickness: up to 48 mm.
  • Recommended solution: Double-chamber energy-saving glass units with argon and multifunctional glass for panoramic zones.

Maximum Structure Dimensions:

  • Maximum structure width: up to 4000 mm.
  • Maximum sash height: up to 2500 mm.
  • Maximum sash width: up to 2000 mm.
  • Sash weight: up to 160-200 kg (depending on hardware type used).

Certified Characteristics:

  • Thermal resistance coefficient (Ro): up to 0.90 m²°C/W (exceeds residential requirements).
  • Sound insulation: up to 42 dB.
  • Air permeability: Class 4 (highest airtightness level).
  • Water tightness: Class 9A (reliable rain protection).

Documentation

WDS SL 76 Technical Catalog
WDS SL 76 Technical Catalog
PDF. 2.8Mb

WDS SL76

Slider-window hybrid. 100% airtightness thanks to smart sash pressing around the entire perimeter.

Average market price:

For a 2-panel sliding system (3000 × 2200 mm) with basic double-glazed unit.

Calculate your window
Comfort Index
Heat insulation
6/10
Noise insulation
7/10

Compare with Similar Profiles

Alternative solutions from other manufacturers

UW- value 1.6
WDS SL 60

WDS SL60

Space savings. Sliding PVC system that's warmer and quieter than old aluminum.
Energy rating
B
System type
Classic (Sliding)
Profile depth
60 mm
Chambers
3 chambers
Glass unit
up to 18 mm
Thermal protection
Uw ≤ 1.6 W/(m²·K)
Sound insulation
≈30 dB
More details
UW- value 1.5
Rehau High-Design Slide

Rehau High-Design Slide

Elegant sliding system for balconies, loggias and terraces. Space-saving PVC profiles with smooth gliding operation and warmer than aluminum.
Energy rating
B
System type
Sliding
Track options
2/3/4 tracks
Sealing
Brush seals
Glass unit
up to 24mm
Surface
HDF finish
Thermal protection
Uw ≤ 1.5 W/(m²·K)
More details
UW- value 1.0
Rehau Synego Slide

Rehau Synego Slide

Sealed sliding system with press-to-close mechanism. Silence and ease in one motion.
Energy rating
A+
System type
Sealed sliding
Profile depth
80mm
Profile chambers
7 chambers
Glass unit
up to 51mm
Max panel weight
200kg
Thermal protection
Uw ≤ 1.0 W/(m²·K)
More details
UW- value 1.3
Rehau Panorama Swing

Rehau Panorama Swing

A unique system where panels slide and pivot, fully opening the aperture.
Energy rating
A
System type
Slide-and-turn
Panel movement
Independent
Opening
Up to 100%
Panels
3-7 panels
Glass unit
up to 40mm
Thermal protection
Uw ≤ 1.3 W/(m²·K)
More details

Side by side

Head to Head: Closest Competitors

How WDS SL76 stacks up against the closest matches from other brands.

SpecificationWDS SL76This profileKömmerling PremiLineRehau Panorama SwingCortizo C 70
BrandWDSKömmerlingREHAUCortizo
MaterialPVCPVCPVCPVC
Profile depth76 mm80 mm (frame)——
Chambers5 chambers———
Glass unit, maxup to 48 mmup to 28 mmup to 40mmup to 28 mm
Thermal (Uw)1.3≤ 1.31.3≤ 1.3
Sound (Rw, dB)≈45 dB≈ 34 Rw(dB)—≈ 34 dB

See all sliding profiles compared.

Open full comparison

Leave a Review

Customer Reviews

Find out what people are saying about it

0.0
Average rating
0 reviews
5 ★
0
4 ★
0
3 ★
0
2 ★
0
1 ★
0

No reviews yet. Be the first!

FAQs

Frequently Asked Questions about WDS SL76

What's the difference from lift-and-slide (HST) doors?

Smart Slide system (WDS SL 76) is lighter, more airtight due to pressing (not lowering), and importantly, significantly more affordable than heavy aluminum HST portals.

Does this door have a threshold?

The frame design requires a small threshold (about 6 cm), as it's necessary for airtight sash pressing from below. This is the price for perfect thermal insulation.

How secure is this window?

Very secure. Thanks to numerous locking points around the perimeter (activated when turning the handle), forcing such a sash with a crowbar is virtually impossible. Protection class up to RC2.

Can it be laminated?

Yes, large sliding doors look stunning in "Anthracite" or "Ultra-matte Black" lamination, imitating expensive aluminum while retaining PVC warmth.