ECO SKY · Lift & Slide Doors
Where walls open.
Siegenia ECO PASS threshold.
Eco Sky lift and slide doors in any cladding — timber, aluminium, glass, or bronze — with a 54 mm slim interlock and a 0 mm ECO PASS threshold. Two threshold options below: choose the one that suits your floor detail.
Siegenia PORTAL HS · ECO PASS thresholdLift & slide door — floor-level transition from interior to exterior
Lift & Slide Door System
Eco Sky · Lift & Slide
Crafted in any material. Built to disappear.
Timber · Aluminium clad · Glass clad · Bronze clad
Eco Sky lift and slide doors are available in pure timber or cladded with aluminium, glass, or bronze — each bringing a distinct character to the facade. The system is engineered around a slim 54 mm interlocking profile where panels meet, keeping the visual weight of the door to an absolute minimum and maximising the glazed area. Whether the intent is warm Scandinavian timber grain or a frameless glass wall, the structure and performance remain the same.
54 mm
Slim interlocking widthWhere two sliding panels meet, the combined sightline is only 54 mm — keeping the view unbroken and the glazed area as large as architecturally possible.
Cladding options
All timber
Oak, Walnut, Sapele, Baltic pine
Aluminium clad
Any RAL — warm timber inside
Glass clad
Frameless panels — bold transparency
Bronze clad
Living patina or lacquered finish
Spans up to 12 mUp to 400 kg per sash54 mm interlockSoft close standardRC2 burglar resistanceSmart drive compatible
ECO PASS Threshold — choose your option
Option 1 of 2
ECO PASS · Level 0 mm
Level door sill
Running rail fully recessed · flush floor passage
The running rail is completely recessed within the threshold profile so the floor reads as one continuous plane from inside to outside. There is no step, no ramp, no visible sill edge — just an uninterrupted transition. The fixed glazing beside the door sits in a conventional frame above floor level. Ideal for projects requiring full DIN 18040-2 barrier-free compliance without altering the glazing detail.
0 mm — no stepno inclineRail fully recessedTimber & timber-aluminiumDIN 18040-2 certifiedift MO-01/1 compression
Siegenia product film — ECO PASS level 0 mm threshold
or
Option 2 of 2
ECO PASS SKY axxent
Fixed glazing extends to the floor
Glass drops into the threshold · no base frame on fixed panel
★ Red Dot Award — Best of Best 2020
The fixed glazing panel beside the sliding door continues down through the threshold and into the floor plane — there is no bottom frame to the fixed glass. The boundary between inside and outside disappears entirely. The threshold finish can be specified to match the floor or frame material, and an identical grille design for the drainage channel creates a perfectly seamless exterior junction. Developed for slim timber-aluminium profiles where minimal sightlines are the design intent.
0 mm — glazing into floorNo base frame on fixed glassTimber-aluminium onlyFinish matches floor or frameMatching drainage grilleRed Dot Award winner
Siegenia product film — ECO PASS SKY axxent
Both options include
10-chamber thermal insulation
Two-level watertight drainage
DIN 18040-2 barrier-free
Pre-assembled COMFORT UNIT
Ready to specify AluClad Slim?
Talk to Monika about your project — ETA 20–24 weeks from order confirmation.