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Stellar Pavilion, Stein (CH)

Designed with excellence

Since 2026, the central square of Stein, Switzerland, has been home to a pavilion that is hard to forget. Four striking columns support a filigree wooden roof, with beams that converge in a funnel shape, much like branches growing toward a trunk. The design and computational planning were created by Edyta Augustynowicz, commissioned by the Municipality of Stein.

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Overview photo of the Stein pavilion canopy

The base structure consists of approximately 3,000 independent, unique wooden parts, no two of which are the same. Each component was derived from a 3D model and robotically fabricated. The craftsmen at ERNE AG Holzbau assembled the parts into larger sections and joined them together during on-site installation. With hundreds of cumulative tolerances, success depends on precision, experience, and craftsmanship.

That is where Polyned’s work began. The top of the wooden structure features a series of high and low points. Using our proprietary membrane engineering software, we translated that geometry into a fully custom-fitted, tensioned membrane: a coated technical fabric that lies over the branch structure like a skin.

The unique aspect was the sequence of operations. Only after the membrane was under tension did we install the cable bracing over it. The cables are anchored through the membrane to the wooden structure, stabilizing the entire assembly. Every penetration through the membrane was made watertight. We tested this detail extensively before the first cable was placed on the roof. In this way, the membrane, cables, and wood form a single, integrated system.

Rainwater also follows the logic of a tree. The membrane directs water to the four columns, which channel it downward like trunks and connect directly to the drainage system. There are no visible gutters or loose downspouts to disrupt the aesthetic.

The result is a permanent canopy of approximately 400 m² with generous clearance. It provides protection from rain, offers shade, and is engineered to withstand local snow loads. The lighting was installed according to the municipality's specifications. As a result, the square in Stein can now host events all year round. A tree provides shade, but it won't keep the rain off in November. This canopy does.

Detail photo of the Stein pavilion canopy
our approach

Full in-house capabilities from start to finish

Conceptual design

Our designer creates an initial sketch and provides an artistic rendering to deliver a clear visual solution for a realistic image. We also provide a cost estimate.

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Conceptueel ontwerp - Polyned
Preliminary design

If you're pleased with the sketch and budget, we'll move on to the preliminary design phase, complete with final calculations, including design specifications, costs, and structural requirements.

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Voorlopig ontwerp - Polyned
Final design

Before we proceed with production, we finalize the construction details in a binding timetable.

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Definitief ontwerp - Polyned
Project realization

Our next step is to execute the production and installation plan. Materials will be packed and delivered to the site, where our VCA-certified technicians will manage the installation.

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Realisatie - Polyned
Service and maintenance

Once the installation is complete, a handover with the project leader will take place, during which everything will be thoroughly checked. We also provide maintenance and service, customized to the project and in agreement with the client.

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Service en onderhoud - Polyned

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Our masterpieces. Pure craftsmanship of exceptional quality. Where functionality, creativity and complexity come together.

Designed with excellence
ons team

A team of experts

From sketch to realization. Our experts handle everything with detailed precision.

careers at Polyned
Albert Jan Holman - Polyned

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Albert Jan

Albert Jan, our logistics and planning specialist, guarantees that every project is supported by precise logistical planning. His role is crucial, as every on-site project relies on his effective coordination.

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Albert Jan

Albert Jan Holman

Logistics Planner and Warehouse Supervisor

Bastiaan Duinisveld - Polyned

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Bastiaan

With an eye for detail, Bastiaan makes sure every project detail is flawless. He provides the technical drawings for production and assembly, ensuring a smooth and efficient process.

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Bastiaan

Bastiaan Duinisveld

Senior Mechanical Engineer

Diana Bonthuis - Polyned

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Diana

Without Diana, there would be no Polyned. As the first point of contact for every customer, Diana has been welcoming everyone with open arms for over 20 years.

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Diana

Diana Bonthuis

Office Manager

Frank van der Ven - Polyned

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Frank

As our production specialist, Frank uses his years of sailmaking experience to excel in technical textiles. He ensures that the material is welded with precision, creating a perfect shape down to the finest details.

Crafted by
Frank

Frank van der Ven

Chief Production Officer

Frens Tromop - Polyned

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Frens

Our main engineer, Frens, leverages his product design background to transform every concept into a technically achievable product. His precision and attention to detail are unmatched, and his deep understanding of membrane technologies, paired with technical prowess, makes him unbeatable.

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Frens

Frens Tromop

Lead Engineer

Gerard van de Berg - Polyned

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Gerard

Gerard is a jack of all trades; there are no issues with him on the job. For more than 20 years, he’s been handling every task with a joke and his two skilled hands.

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Gerard

Gerard van de Berg

Warehouse Employee

Hans Arends - Polyned

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Hans

Finance guru Hans keeps a sharp eye on all financial matters, spotting discrepancies and deviations with ease. Hans presents numbers with a smile and a healthy dose of Dutch down-to-earthness.

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Hans

Hans Arends

Finance Manager

Hans Schoemaker - Polyned

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Hans

Having been part of Polyned for many years and now leading the installation efforts, Hans is an expert in custom craftsmanship. His extensive experience across numerous projects ensures he can tackle any technical challenge.

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Hans

Hans Schoemaker

Chief Executor

Henk Kolthof - Polyned

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Henk

Henk is the expert when it comes to air domes, recognized and familiar with everyone. If you’ve had an air dome installed, you’ve met him. Henk’s capabilities go beyond air domes; he can install nearly anything. Fantastic!

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Henk

Henk Kolthof

Mechanic

Hink de Haan - Polyned

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Hink

Hink brings engineering expertise down to the smallest details and knows (almost) everything. His pragmatic method allows him to convert his broad theoretical expertise into a functional product quickly. For genuine engineering humor, Hink is the go-to person.

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Hink

Hink de Haan

Project Engineer

Irma van Doorn - Polyned

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Irma

Irma geeft een vrolijk karakter aan Polyned. Ze houdt toezicht op de operationele planning en is het aanspreekpunt voor iedereen. De vriendelijke stem aan de telefoon voor al uw service- en onderhoudsvragen.

Crafted by
Irma

Irma van Doorn

Operationeel Planner & Bedrijfsadministratie

Laurens Oppers - Polyned

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Laurens

With a strategic and planned approach and expertise in business operations and market execution, Laurens remains calm and is always supportive to everyone inside and outside of the organization.

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Laurens

Laurens Oppers

CEO

Wilko Stuiver - Polyned

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Wilko

Attention to detail is Wilko’s hallmark. His craftsmanship with his hands ensures every result is achieved. No air dome, facade, or canopy would be completed without Wilko.

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Wilko

Wilko Stuiver

Production Staff Member

Renko Driesen - Polyned

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Renko

Decisive and client-focused, Renko is your contact for the best air domes. With his in-depth knowledge of financing processes, he can make any air dome practical for any party. He’s also available for other sales-related questions.

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Renko

Renko Driesen

Commercial Manager

Sven Benerink - Polyned

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Sven

With a focus on both creativity and process, Sven will assist and guide you through the entire sales process to make your boldest plans come to life. With expertise in canopies, facades, coverings, and acoustics, he is your key contact for all your needs.

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Sven

Sven Benerink

Sales Consultant

Charlotte Mosterman - Polyned

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Charlotte

With energy and a willingness to assist, Charlotte is your go-to person for all inquiries about air domes. Whether you want to schedule an appointment or find the best air dome, she’s your first point of contact and is always there to support you.

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Charlotte

Charlotte Mosterman

Sales

Simon Visser - Polyned

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Simon

As a pioneer in technical textiles, Simon is at the forefront of the latest innovations and makes challenging solutions a reality. He is the leading specialist in membrane technologies and materials.

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Simon

Simon Visser

CTO

Rob ten Wolde - Polyned

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Rob

A specialist in managing processes with an emphasis on planning and scope. His technical skills and determination ensure each project achieves success.

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Rob

Rob ten Wolde

Sr. Project Manager

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Simon Visser
CTO
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