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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

Project in-detail

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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MICROHOME 10: Celebrating Small-Scale Living with €100,000 Prize Fund and Kingspan’s Innovation

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Competition organisers

The MICROHOME 10 competition invites participants to submit visionary designs for off-grid, modular microhomes that push the limits of sustainable, small-scale living. Organised by Buildner in partnership with Kingspan and Hapi Homes, this tenth edition sets the challenge of designing a dwelling for two people within a maximum floor area of 25 m², encouraging bold solutions adaptable to any urban or rural location. The competition continues Buildner’s mission to foster innovative approaches to compact, energy-efficient housing that can address pressing global challenges.

This year’s edition offers a generous total prize fund of €100,000, including the Kingspan Award for designs that integrate high-performance Kingspan products and the Hapi Homes Award for a project selected for real-world construction. In addition to cash prizes, the winners gain international exposure through Buildner’s media partnerships, publications, and a dedicated MICROHOME magazine, further amplifying their ideas to the wider architectural community.

Key dates for MICROHOME 10 include the closing date for registration on 25 September 2025, the submission deadline on 29 October 2025 (11:59 p.m. London time), and the announcement of winners on 9 December 2025. These milestones ensure participants have clear timelines to develop and present their concepts, with early registration discounts available to support students and emerging designers worldwide.

MICROHOME

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

100,000 € Prize Fund / Kingpsan Edition #10 ideas COMPETITION
Prize 100,000 € + Potential realisation
Eligibility Open to all
Final registration deadline 25 September 2025

Enter an open architecture
competition now

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