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Trombe Walls and Polycarbonate Panels in a Nature-Focused Visitor Center

Author:
Manuel Alejandro Martinez Guajardo
Trombe Walls and Polycarbonate Panels in a Nature-Focused Visitor Center
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Using trombe walls for passive heating and polycarbonate panels for durable, natural lighting, the visitor center provides an engaging space for exploration and education within the Kemeri Bog landscape.
5 key facts about this project
01
Use of trombe walls for efficient passive heating.
02
Incorporation of rainwater harvesting systems for sustainability.
03
Polycarbonate panels provide natural light while minimizing vandalism.
04
Visitor areas designed to blend seamlessly with the natural landscape.
05
Locally sourced wood enhances environmental responsibility and cultural connection.

The Kemeri Bog Visitor Center is located within the coniferous forest of Kemeri, Latvia. It serves as an important entry point to the Kemeri Bog Boardwalk. The design emphasizes a close relationship between the building and its natural surroundings, aiming to create a welcoming environment for visitors. The center is intended to provide essential facilities while respecting the ecological context in which it is placed.

Architectural Concept

The design of the visitor center is inspired by the surrounding landscape, with careful consideration of sunlight and wind patterns. The building features a modern take on traditional Latvian gable roofs, which adds cultural significance to its contemporary appearance. By positioning the center in relation to the towering pine trees on the site, the design not only respects the local environment but also enhances the visitor experience.

Functional Layout

Inside the center, a variety of spaces cater to different visitor needs. These include parking areas for visitors and buses, engaging recreational spaces like a football field and playground, as well as essential facilities such as restrooms and a café. This thoughtful arrangement makes the center a multifunctional space, encouraging people to interact with nature and with each other.

Environmental Integration

Sustainability is an important aspect of the design. A rainwater harvesting system helps reduce the building’s ecological footprint, while passive heating is achieved through the incorporation of a trombe wall in the lower section. By focusing on southern orientation for optimal solar exposure, the design aims to improve energy efficiency and promote a responsible approach to environmental care.

Materiality and Detailing

The materials chosen for the project reflect both practical needs and the local context. Locally sourced wood serves as the main construction material, connecting the building with its surroundings. Concrete flooring adds thermal mass, allowing for efficient passive heating. Polycarbonate panels create a lightweight facade that lets in natural light while offering protection from the elements. Together, these materials work to achieve a design that is functional and visually appealing.

Overhanging roofs at the entrance provide shelter and create inviting spaces for outdoor gatherings. This design detail draws visitors into the building while enhancing the connection between the interior and the wide-open spaces of nature beyond.

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The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

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