The system
The first Sky-Frame system, and still the one most openings call for.
Classic is where Sky-Frame started. Insulating glass units run in slim aluminium frames fitted flush with the floor and the ceiling, so a closed elevation reads as glass from slab to soffit rather than as a run of doors.
Drainage for the flush assembly runs either in a recessed channel or beneath a raised outdoor floor. That choice, and the floor build-up it needs, is worth settling before the slab is designed — see track options.
Specify Classic when
- The elevation is straight and the view is the reason for the opening.
- You need large panes — up to 2.3 × 4 m double or triple glazed, larger on request.
- Thermal performance matters: Sky-Frame 3 reaches Uw 0.87 W/m²K (EN 10077).
Technical
Key figures
Values for Sky-Frame 2 and 3 with the Original track, from Working with Sky-Frame. Uw calculated on a 4.6 × 3 m element.
| Property | Value | Note |
|---|---|---|
| Panel size | 2.3 × 4 m | Sky-Frame 2 and 3. Single-glazed 3.2 × 4 m. Larger on request. |
| Glazing | 12 / 30 / 54 mm | Sky-Frame 1 single · 2 double · 3 triple |
| Thermal, EN 10077 | Uw 1.36 / 0.87 | W/m²K — Sky-Frame 2 (Ug 1.1) / Sky-Frame 3 (Ug 0.6) |
| Thermal, SIA 331 | Uw 1.25 / 0.75 | W/m²K — same assemblies, Swiss method |
| Watertightness | E750 / E900 | EN 12208 — Sky-Frame 2 / 3 |
| Air permeability | Class 4 | EN 12207 |
| Wind load | C3 / C5 | EN 12210 — Sky-Frame 2 / 3 |
| Sound insulation | Rw,P 37 / 44 dB | Sky-Frame 2 / 3 |
| Security | RC 2 | EN 1627, with Sky-Frame Guard |
| Daylight to glass | 98% |
Brochures are hosted by Sky-Frame. CAD drawings and technical documentation need a free Sky-Frame registration.
Classic in use
For architects
Not sure Classic is the right call?
Send the elevation and we'll say so either way. We'd rather talk you into a simpler system than sell you one you don't need.