Developed for the highest demands, this system combines robust engineering with advanced protective features - from bullet resistance to reliable flood protection.
Vertical Stacking - the system for ultimate protection

Flexibility, design, safety

Intelligently stacked.
Impressively opened.
The vertical stacking technology allows for space-saving integration, smooth operation, uncompromising strength and longevity. The solid, self-supporting steel structure includes pinch protection between the panels, while integrated light barriers ensure quiet operation.
Installation is fast and efficient thanks to prefabricated modules. Infinite design possibilities make the Vertical Stacking system as versatile as it is impressive. Any type of filling, different panel heights, flexible leaf thicknesses, toughened or laminated safety glass - framed or frameless. Design freedom: maximum.
The Top 6 Highlights of the Product
Flood Protection
Reliable flood protection even under extreme weather conditions. A precise sealing technology consistently keeps water out.
Ballistic Protection
Depending on the configuration, ballistic protection for the highest security requirements. Maximum resistance without compromising design and functionality.
Opening Speed
0.25 m/s opening speed for fast and efficient operation. Smooth movement with maximum comfort and high safety.
Burglar Protection
Maximum security through burglar-resistant construction. Reliable protection even for large openings.
No Load Transfer
No load transfer to the ceiling structure and only minimal static load on the stacked door panels!
Design
Installations up to 4 meters are possible without vertical mullions — creating breathtaking, operable panoramic façades!
Flood protection for sensitive areas

The esto Vertical Stacking System was developed to reliably protect buildings even under extreme weather conditions. Its integrated sealing technology prevents water ingress even across large-scale openings.
Security without visible boundaries
Thanks to its robust construction and the use of highly durable materials, the system remains permanently sealed even during heavy rainfall, surface water exposure or increased water pressure.
Depending on the configuration and project requirements, the system can be adapted to different flood protection classes and provides reliable security for sophisticated architecture, critical infrastructure and exclusive residential properties.
At the same time, the Vertical Stacking System combines high-end engineering with modern design, clean lines and maximum openness - without appearing like a conventional protection system.
Ballistic protection for modern architecture

Security requirements for exclusive residential buildings, commercial properties and sensitive infrastructure are continuously increasing, demanding solutions that go far beyond conventional door and façade systems.
The esto system was developed for maximum resistance against ballistic impact. Its extremely robust steel construction and selected panel infills provide reliable protection while ensuring exceptional stability even across large-scale openings.
Unlike traditional security systems, the protection remains almost invisible. Large glass surfaces, clean lines and modern architecture can be realized without compromising safety.
The result is a solution that combines certified protection, architectural freedom and uncompromising durability.
Precision at maximum speed

The esto Vertical Stacking System impresses with its fast and controlled opening movement. Intelligent drive technology enables efficient operation, reduces waiting times and ensures maximum user comfort even for large-scale installations.
Fast. Quiet. Controlled.
Despite its high opening speed, the movement remains exceptionally smooth and precise. The vertical stacking technology guarantees a consistent motion sequence with minimal space requirements and maximum reliability.
When security becomes part of the architecture

Maximum security through engineering
The extremely robust, self-supporting steel construction offers virtually no vulnerable access points and significantly increases resistance against forced entry using tools.
Its massive construction and the stable connection between the individual elements create a level of security that goes far beyond conventional door systems. Even large-scale openings remain uncompromisingly stable and highly resistant.
Depending on the panel and glazing configuration, the system can easily achieve RC4 resistance class standards, meeting the highest burglary protection requirements - without appearing like a traditional security system.
No load transfer to the building structure

The esto Vertical Stacking System is designed as a self-supporting construction and transfers no additional loads to the building structure. Forces generated by movement, weight and operation are fully absorbed and controlled within the system itself.
This makes the system ideal for sophisticated architecture, large-scale openings and sensitive façade constructions. Complex structural modifications to the building can be significantly reduced.
The independent construction also enables flexible integration into both new builds and existing buildings - efficient, secure and architecturally uncompromising.
Seamless glass surfaces. Maximum impact.

With this system, installations up to 4 meters wide are possible without vertical mullions. The result is expansive, uninterrupted glass surfaces with maximum transparency and a particularly clean architectural appearance.
The stable construction enables slim sightlines and unobstructed views, making it ideal for modern residences, exclusive showrooms and premium façade concepts where openness and design take center stage.


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