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Geothermal Community Hub Featuring Volcanic Stone and Double-Skin Facade

Geothermal Community Hub Featuring Volcanic Stone and Double-Skin Facade
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Constructed with volcanic stone and a double-skin facade, the community hub leverages geothermal energy to create a sustainable gathering space that fosters social interaction and environmental sensitivity.
5 key facts about this project
01
Constructed with locally sourced volcanic stone to enhance durability and aesthetic integration.
02
Incorporates a double-skin facade to optimize insulation and natural ventilation.
03
Utilizes a geothermal energy system for efficient heating and sustainability.
04
Features charred wooden shingles for added fire resistance and a unique texture.
05
Designed with tiered levels to promote social interaction and diverse user experiences.

### Overview
Located in the unique geological setting of Myvatn, Iceland, the design of "Cráter" investigates the interplay between natural ecosystems and human habitation. The project references volcanic craters to symbolize social dynamics and human interactions, translating these themes into an architectural form that encourages communal engagement. Emphasizing a commitment to sustainable design, "Cráter" seeks to create spaces that reflect both local culture and the surrounding environment.

### Materiality and Sustainability
The material selections for "Cráter" are intentionally designed to harmonize with the local geology and promote sustainability. Concrete is utilized for its structural capabilities while mimicking the textures of Iceland's volcanic landscape. Wood is strategically incorporated in the interiors to create a warm atmosphere, enhancing users' sensory experiences. Glass façade elements are included to maximize natural light and visually connect occupants with the stunning exterior environment. Local vegetation, including native species such as Nordic gallium and white birch, is integrated to support biodiversity and aesthetic appeal. Green roof systems further augment energy efficiency and foster ecological health, contributing to the project's overall sustainability goals.

### Spatial Organization
The tiered structure of "Cráter" is organized into distinct levels, each serving varied functions that enhance user experience. The first level features a double-skin façade that acts as an environmental buffer, promoting natural ventilation while maintaining thermal comfort. A dedicated vegetation layer not only enhances aesthetics but also aids in stormwater management. The ground floor leverages geothermal technology for radiant heating, substantially reducing energy reliance on fossil fuels. Meanwhile, the underground level connects to the earth’s geothermal systems, providing a direct link to local natural resources. The thoughtful layout, including diverse communal spaces such as breweries and relaxation areas, fosters social interaction and enhances the user experience within a cohesive environment.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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Competition organisers

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.

Buildner's Unbuilt Award 2025

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
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Eligibility Open to all
Final registration deadline 30 October 2025

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