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Coral Concrete Watchtower with Thermal Regulation and Timber Structure

Authors:
Tobias Tytgat, Fatos Berisha, Jan De Graeve
Coral Concrete Watchtower with Thermal Regulation and Timber Structure
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Constructed from coral concrete and cross-laminated timber, the watchtower integrates thermal regulation features to create a functional space for visitors to explore the surrounding landscape.
5 key facts about this project
01
Constructed with coral concrete to enhance durability and minimize maintenance.
02
Features an innovative cross-laminated timber structure for improved thermal performance.
03
Incorporates a charred wooden façade for natural weather resistance and aesthetic appeal.
04
Designed to optimize visitor interaction through a semi-tempered hallway.
05
Utilizes Dabiri wind turbines to support renewable energy needs.

The project is a multifunctional watchtower located in a distinctive geographical area that emphasizes minimal interference with the natural environment. It aims to engage visitors and offer practical functionality. The design is compact, reflecting the intimate atmosphere of the nearby caves. The overall concept combines simple construction techniques with both passive and modern technologies, allowing for an effective blend of usability and aesthetics.

Design Concept and Spatial Organization

Careful planning outlines the watchtower's spatial organization to promote interaction among visitors. Inside, a semi-tempered hallway and a tourist information center guide guests throughout the building. Heating is limited to key areas, including the office and café, ensuring comfort while providing protection from the elements. This layout invites individuals to connect with one another and the surrounding landscape.

Material Selection and Performance

Several materials have been chosen strategically for construction, aiming for strength and energy efficiency. Cross-Laminated Timber (CLT) panels serve as the main structural framework, lending necessary support. Wood fiber insulation enhances thermal performance, while the ventilated façade made of fired wooden slats improves air circulation and serves an aesthetic purpose.

Sustainable Energy Integration

The design emphasizes sustainability by integrating renewable energy sources. Solar panels on the roof capture sunlight, while Dabiri wind turbines along the access path contribute to the building’s energy demands. This combination helps to reduce the ecological impact and supports self-sufficiency, highlighting the commitment to environmentally friendly practices.

Building Longevity and Maintenance

Durability is a core focus of the watchtower, with coral-based concrete used for the foundation, providing a stable base for essential systems. The choice of a burned façade not only enhances visual appeal but also minimizes maintenance efforts over time, making the building suitable for its environment.

Large windows frame views of the landscape, inviting natural light into the space. This feature deepens visitors’ connection to their surroundings, fostering an appreciation for the natural beauty while providing a comfortable space for exploration and gathering.

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The Next House: USA — A Global Call to Reimagine the American Suburb

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Competition organisers

Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

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