Frame depthfrom 80 mm
Uw from0.8 W/m²K
Max sash weightup to 400 kg
Movementsliding / lift-and-slide

When a design leans heavily on large panes of glass and minimal visible frame, ASE 80 is the natural step up from the ASE 60. It is one of Schüco's flagship sliding doors, built around heavy, wide-format sashes and a considerably deeper thermal break.

Sash weight and opening size

Sashes of up to 400 kg allow openings of several metres in width without the movement becoming heavy or unreliable — provided the substructure and threshold detail are properly resolved. That last point is not a formality: cutting corners on the sub-sill or the track alignment shows up quickly.

Thermal figures worth the specification

A Uw from 0.8 W/m²K puts ASE 80 within reach of higher-performance new-build targets. It is a common choice on architect-led homes around Welwyn Garden City, where energy performance and slim sightlines are equally on the brief.

Alternatives worth putting on the shortlist

For projects where sightlines are the single most important requirement, the Cortizo Cor Vision is worth pricing alongside ASE 80 — the two systems occupy overlapping territory and the right answer depends on the specific opening.

Editor's note. 5EC configures ASE 80 to the opening rather than the other way round, and will advise where lift-and-slide operation makes more sense than a conventional slider.

For readers researching options locally, 5EC's sliding door range and 5EC's premium line are both worth reviewing — both are handled by 5EC, a Stevenage-based authorised supplier working across Hertfordshire.

Detailed technical documentation is available on the manufacturer's specification.

Schuco Doors Stevenage Team

The editorial team behind this journal — a small group covering aluminium windows and doors from the Hertfordshire angle. More on the team on the about page.