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Subterranean Shelter Crafted with Thermal Mass and Green Roofing Elements

Authors:
Roberto Menozzi, Lorenzo Trentuno, Francesco Chiacchiera
Subterranean Shelter Crafted with Thermal Mass and Green Roofing Elements
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Built into the earth, this residential retreat utilizes thermal mass and green roofing while incorporating warm wooden elements to create an energy-efficient space that harmonizes with the Icelandic landscape.
5 key facts about this project
01
Built primarily underground to enhance thermal performance and blend with the landscape.
02
Incorporates a green roof system, promoting biodiversity and improving insulation.
03
Large windows strategically placed to capture sweeping views and maximize natural light.
04
Utilizes charred wooden shingles for enhanced durability and fire resistance.
05
Features communal terraces that facilitate social interactions while offering elevated vistas.

### Overview
The Torf Skjöl project is situated in Iceland’s rugged terrain, where it reinterprets the traditional Icelandic "torf house" to address contemporary ecological and energy efficiency standards. The design integrates structural elements with the landscape, fostering a relationship between the built environment and its natural context.

### Spatial Strategy
The design philosophy emphasizes "negative space," with the main shelter primarily embedded underground. This approach minimizes visual disruption to the landscape while paying homage to Icelandic architectural traditions. The resulting spaces provide dual experiences: they serve as a refuge from the harsh weather and as vantage points for engagement with the surrounding scenery. Elevated communal areas encourage social interaction among users, enhancing the connection to the landscape.

### Materiality and Energy Efficiency
Materials have been selected to support energy efficiency while aligning with ecological principles. Architectural concrete walls offer structural stability and thermal mass, while wood elements reflect traditional craftsmanship and warmth. Metal panels are utilized for roofing to combine modern aesthetics with durability. Photovoltaic panels are incorporated into the facade for energy generation, and the use of fieldstone and paving stones enhances visual ties to the local geology. A green roof system aids insulation and supports local biodiversity, further integrating the structure within its environment.

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Buildner's Unbuilt Award 2025
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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
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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