Uw, W/(m²·K)
Same metric as a window, but sliders generally lose 0.2–0.4 W/m²K to the equivalent tilt-and-turn because of the larger glass area and the seal geometry. Sub-1.0 sliders are genuinely premium.
Compare 24 Sliding Systems Side by Side
Every patio door, lift-and-slide and panoramic sliding system in our catalogue — 16 PVC and 8 aluminium models from 6 brands. Sort by Uw, depth, glass unit or filter by material. For sliders, sash size and weight matter as much as U-value — check the detail page before you decide.
Get a quote in 3 brandsShowing all 24 systems
| Veka Vekamotion 82 MAX | VEKA | PVC | 0.73 | — | — | up to 54 mm | ≈ 45 dB | |
| Veka Vekamotion 82 | VEKA | PVC | 0.78 | — | — | up to 54 mm | ≈ 44 dB | |
| Rehau Geneo HST | REHAU | PVC | 0.80 | 86mm | — | up to 53mm | — | |
| Schüco ASE 80.HI | Schüco | Aluminium | 0,80 | — | — | up to 60mm | ≈ 43 dB | |
| Veka Vekamove 76 | VEKA | PVC | 0.83 | — | — | up to 48 mm | ≈ 43 dB | |
| Kömmerling PremiDoor 76 | Kömmerling | PVC | ≤ 0.9 | 76 mm (frame 179 mm) | — | up to 50 mm | ≈ 44 Rw(dB) | |
| Kömmerling PremiDoor 88 | Kömmerling | PVC | ≤ 0.9 | 88 mm (frame 207 mm) | — | up to 56 mm | ≈ 48 Rw(dB) | |
| Cortizo COR Vision PLUS | Cortizo | Aluminium | ≤ 0.9 | — | — | up to 54 mm | ≈ 43 dB | |
| Kömmerling PremiSlide 76 | Kömmerling | PVC | ≤ 0.95 | 76 mm (frame 158 mm) | — | up to 50 mm | ≈ 45 Rw(dB) | |
| Rehau Synego Slide | REHAU | PVC | 1.0 | 80mm | 7 chambers | up to 51mm | — | |
| Cortizo E 170 | Cortizo | PVC | ≤ 1.0 | — | — | up to 40 mm | ≈ 42 dB | |
| Schüco ASE 67 PD | Schüco | Aluminium | 1,0 | — | — | up to 49mm | ≈ 46 dB | |
| Cortizo Bi-Fold | Cortizo | Aluminium | ≤ 1.1 | — | — | up to 45 mm | ≈ 45 dB | |
| Schüco LivIngSlide | Schüco | PVC | 1.1 | — | — | up to 52mm | ≈ 45 dB | |
| Schüco ASE 60 | Schüco | Aluminium | 1,1 | — | — | up to 40mm | ≈ 41 dB | |
| Rehau Panorama Swing | REHAU | PVC | 1.3 | — | — | up to 40mm | — | |
| Kömmerling PremiLine | Kömmerling | PVC | ≤ 1.3 | 80 mm (frame) | — | up to 28 mm | ≈ 34 Rw(dB) | |
| Cortizo 4900 Corredera | Cortizo | Aluminium | ≤ 1.3 | — | — | up to 36 mm | ≈ 40 dB | |
| Cortizo C 70 | Cortizo | PVC | ≤ 1.3 | — | — | up to 28 mm | ≈ 34 dB | |
| Cortizo COR Vision | Cortizo | Aluminium | ≤ 1.3 | — | — | up to 30 mm | ≈ 41 dB | |
| WDS SL76 | WDS | PVC | 1.3 | 76 mm | 5 chambers | up to 48 mm | ≈45 dB | |
| Rehau High-Design Slide | REHAU | PVC | 1.5 | — | — | up to 24mm | — | |
| Cortizo COR 4200 | Cortizo | Aluminium | ≤ 1.6 | — | — | up to 26 mm | ≈ 38 dB | |
| WDS SL60 | WDS | PVC | 1.6 | 60 mm | 3 chambers | up to 18 mm | ≈30 dB | |
| No sliding systems match these filters. | ||||||||
Quick guide
What to Look at on a Slider
The numbers above are only half the story for sliding systems
Material
PVC sliders top out around 200 kg per sash. Aluminium handles 300–400 kg per sash easily. For openings wider than ~3 m or panoramic glazing, aluminium is usually the only option.
System type
"Parallel-slide" sits flat in the wall and rolls; cheap. "Lift-and-slide" (HST) lifts off the seal before sliding; warmer and air-tight. "Tilt-slide" gives ventilation. Names matter — check the detail page.
Threshold
A "flush threshold" (≤ 20 mm) is accessible and elegant but harder to make watertight. Standard sills (60–90 mm) are foolproof. If you want barrier-free, ask about it before signing.
Choose by use case
Which Sliding System Is Right for You?
Use case decides material — start there, then optimise inside that constraint.
Panoramic glazing, wide opening
Filter material = Aluminium. Look for ultra-slim sightlines (around 20–35 mm) and lift-and-slide hardware. PVC simply can't carry the sash weight at this scale.
Look at: COR Vision, COR Vision PLUS, ASE 80 HI.
Living room → terrace patio door
A 2–3 m opening, indoor-outdoor flow. Lift-and-slide PVC is the sweet spot — warmer than aluminium, much cheaper, sash weight well within PVC limits. Sort by Uw.
Look at: PremiDoor 88, Geneo HST, Synego Slide.
Balcony slider in an old apartment
Existing opening is fixed, the build-up is shallow. Parallel-slide in PVC is the standard solution. Don't pay for lift-and-slide here — diminishing returns. Filter brand first to match the rest of your windows.
Look at: PremiLine, High-Design Slide, Vekamotion 76.
Folding/bi-fold for a kitchen-garden link
Different mechanism altogether — multiple narrow sashes that fold up against a wall. Always aluminium. The U-value is mid-pack but the wall opens completely, which is often the point.
Look at: Cortizo Bi-Fold.
FAQ
Sliding System Comparison FAQ
Why are sliders worse on Uw than regular windows?
Two reasons. First, the sash-to-frame seal on a slider has to allow movement, so it never compresses as tightly as a turn-and-tilt gasket — except on lift-and-slide systems, which physically lift the sash onto a compressed seal. Second, sliders are typically much larger, meaning a higher glass-to-frame ratio. A 2.4×2.2 m slider with U-value 1.0 is doing well.
When do I have to go aluminium?
When any single sash exceeds about 200 kg, or when sightlines below ~50 mm matter for the look. Roughly: glass area above 2.8 m² per sash, or panel widths above 1.6 m. Below that, PVC lift-and-slide systems (PremiDoor 88, Geneo HST) are warmer and cheaper for the same Uw.
Parallel-slide vs lift-and-slide — what's the real difference?
Parallel-slide (HS) keeps the sash in contact with the seals while sliding — easier to operate but the seals wear and you compromise on air-tightness. Lift-and-slide (HST) raises the sash 6–8 mm off the seal before sliding, then lowers it back onto a compressed seal. Result: airtight, watertight, much better Uw. Costs 20–40% more.
Can I get a flush threshold for accessibility?
Yes, most premium sliders (COR Vision PLUS, PremiDoor 88, Geneo HST) offer a flush or near-flush sill option. Below 20 mm. Comes at a small Uw penalty and demands very careful installation to stay watertight — make sure your installer has done it before.
How do sliders compare for sound?
Generally weaker than a turn-and-tilt at the same glass spec, by 2–5 dB. Lift-and-slide systems close the gap. If acoustic insulation is the priority, a fixed glazed unit + a small opening sash beats a big slider every time.
How should I use this table?
Filter by material first — PVC or aluminium, dictated by sash size. Then sort by Uw and look at the top 4–5 options that match your budget bracket. Open each detail page for max sash dimensions and threshold options before deciding.
Still weighing your options?
Tell us the opening size, the wall thickness and what's on the other side (terrace, balcony, garden), and we'll send three matched quotes for the right type of slider within 24 hours.
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