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Sky-Frame
Frameless sliding glass from Switzerland. Four systems, two tracks, three glazing levels — and a set of options on top.
Systems
Start with how the opening moves.
Straight, curved, inclined, or a door. That one question picks the system; everything else on this page is a choice within it.
Classic
The original Sky-Frame system. Straight runs, ceiling-height glass, frames flush with floor and ceiling.
Panes to 2.3 × 4 m
Arc
Curved glass on a curved track, for radiused elevations.
Radius from 2.5 m
Slope
Sliding glass set at an angle — leaning into the room or out from the facade.
Up to 20°
Pivot
A glass door that turns on an offset axis. One leaf, up to 2.5 × 4.5 m.
Leaf to 2.5 × 4.5 mTrack
Decide the floor before the floor is poured.
The track is the one Sky-Frame decision that reaches into the structure. Original and Plain need different floor depths, so the choice belongs at concept stage, not at order.
| Track | Minimum floor depth | Note |
|---|---|---|
| Original | ≥ 140 mm · ≥ 145 mm | Sky-Frame 2 · 3. Visible transition at the threshold. |
| Original, small sill | ≥ 75 mm | For low floor build-ups, where common and compliant. |
| Plain | ≥ 100 mm · ≥ 173 mm | Sky-Frame 2 · 3. Track in a 10 / 13 mm floor gap, flooring continuous between. |
Depths read from Sky-Frame's published floor sections in Working with Sky-Frame. Confirm against the current technical documentation for your detail.
One thing to know for Ireland: Sky-Frame publishes Sky-Frame 2 with Plain only for sites with a minimum annual temperature of 5 °C or above. For most Irish sites that points to Sky-Frame 3 with Plain — we'll confirm for yours.
Glazing
Three levels of glass.
| Technology | Glass | Performance |
|---|---|---|
| Sky-Frame 1 | 12 mm single | For applications with no thermal insulation requirement. Panels to 3.2 × 4 m. |
| Sky-Frame 2 | 30 mm double | Uw 1.36 W/m²K (EN 10077). Watertightness E750, wind C3, Rw,P 37 dB. The most specified. |
| Sky-Frame 3 | 54 mm triple | Uw 0.87 W/m²K (EN 10077), 0.78 with Ug 0.5. Watertightness E900, wind C5, Rw,P 44 dB. MINERGIE certified. |
Values for Classic with Original track, Uw on a 4.6 × 3 m element. Source: Working with Sky-Frame.
Options
What can be added.
Not every option works with every system and track. Ask before you draw one in.
For architects
Send us the drawings.
We'll tell you what's specifiable, what isn't, and what it changes — early, while it's still cheap to move things.