From door to panorama

Lift-slide doors that eliminate the boundary between inside and outside

The sliding door is no longer just a passageway, but an architectural element that brings light, space and experience together in a room. With the latest lift-slide solutions, such as the PORTAL HS slim from SIEGENIA, the boundary between interior and exterior blurs and creates a panorama that connects architecture and nature.

Lift-slide principle in architecture

Anyone who works with large areas of glass knows that technology is key. How do you make a door sash weighing hundreds of pounds effortless to operate? And how do you guarantee comfort and energy performance at the same time? The lift-slide principle offers the solution here. By lifting the door leaf when opening, it rolls lightly and smoothly over the rails while closing securely and airtight when closed. For architects, this means plenty of design freedom: from slender 150 kg elements to imposing 400 kg sliding panels. For residents, it also means ease of operation and assurance that the door is not only beautiful, but also performs safely and durably.

The new slim: PORTAL HS slim

Within the wide range of sliding door solutions, the PORTAL HS slim from SIEGENIA stands out. This lift-and-slide solution was specially developed for architectures in which the boundary between inside and outside should be as transparent as possible. With a center post of only 60 mm, a panorama that is barely interrupted by profiles opens up. The result: maximum light, visibility and experience.

But slimness here does not mean sacrificing performance. The PORTAL HS slim convinces with high airtightness and driving rain tightness up to Class 9A. Moreover, burglar resistance up to RC2 is possible even with a sill height of just 5 mm. This makes the PORTAL HS slim a unique solution that combines aesthetic ambition with technical reliability.

Beyond aesthetics: efficiency and comfort

A design is only truly successful if its realization is also efficient. For processors, the PORTAL HS smart is therefore based on the proven HS Holz 4.0 construction, allowing existing know-how and components to be utilized. This simplifies assembly and avoids unnecessary inventory. In addition, the sliding door is available as a COMFORT UNIT: a fully prefabricated package including mounted ECO PASS sill, which can be integrated directly into the building element. For architects and clients, this means certainty about quality and execution, for occupants a door that functions smoothly and reliably for years.

Sustainable and future-proof

The development of lift-slide door systems such as the PORTAL HS slim fits within the wider trend of circular and sustainable construction. Less use of materials through slimmer profiles, more efficient processes in processing and a long service life contribute to the sustainability of the final product. In addition, the PORTAL HS slim offers the option of motorized operation and integration into smart home systems, bringing the sliding door in line with the living standards of the future.

Architecture in motion

The rise of these sliding door solutions shows that our architecture is not standing still. Where doors used to be primarily functional openings, they are now architectural links. They connect interiors to outdoor spaces, strengthen the relationship with the environment and create a sense of freedom that is increasingly demanded in contemporary designs.

With solutions like the PORTAL HS smart, the boundary between inside and outside not only narrows, it almost disappears completely.

The core benefits at a glance

For architects:

- Slim profiles (60 mm center post) for maximum light penetration;

- High air tightness and impact rain tightness (Class 9A);

- Burglar resistance up to RC2, even at low sill height;

- Optionally motorized and suitable for smart homes.

For processors:

- Based on HS Holz 4.0: efficient use of existing components;

- No material alien stabilizers required;

- Also available as an assembly-ready COMFORT UNIT;

- Streamlined processing and smart inventory management.