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Cave-Like Structure Enhanced by Downy Birch and Geothermal Heating

Author:
Bram Van klink
Cave-Like Structure Enhanced by Downy Birch and Geothermal Heating

Project in-detail

Constructed with local Downy Birch and utilizing geothermal heating, the building offers a cave-like environment that integrates sustainable practices to support a multifunctional space including a kitchen, bar, and work area.
5 key facts about this project
01
Constructed using locally sourced Downy Birch, enhancing local craftsmanship.
02
Incorporates geothermal heating for sustainable energy use.
03
Features a unique cave-like shape that integrates with the landscape.
04
Includes a sloped turf roof aligned with prevailing wind directions.
05
Designed to foster community interaction through multifunctional spaces.

The architectural design integrates its form with the landscape while focusing on a cave-like experience. Set against the backdrop of traditional Icelandic architecture, the building accommodates various functions such as a kitchen, bar, cafe, and work station. The design encourages a strong connection between the occupants and the natural environment through its careful layout and circulation.

Construction Methodology
The building employs a blend of stone and wood, reflecting methods seen in the Icelandic "turf house." This construction approach allows the structure to resonate with the local architectural tradition. The combination of stone and wood provides both durability and effective thermal performance, which is crucial for the climate. A layer of turf is added for insulation, supporting energy efficiency in the building’s design.

Materiality
A hand-built tower stands out as a significant architectural feature, made from locally sourced Downy Birch wood. This tower not only serves a practical purpose but also highlights local craftsmanship. The use of materials that are native to the area strengthens the connection to the environment and promotes sustainability by supporting local resources.

Climate Strategies
The design includes several strategies aimed at enhancing energy efficiency. Geothermal floor heating makes use of the Earth’s natural heat, maintaining comfortable indoor temperatures. A sloped turf roof is aligned with the main wind directions, further protecting the structure from harsh weather while promoting natural ventilation. Solar panels are integrated into the skylights, enabling the building to generate renewable energy and increase natural light within the interior spaces.

Attention to detail is evident in the way the design balances functionality with the character of the surrounding landscape. The careful choice of materials and climate-responsive strategies create a sense of harmony between the architecture and its natural setting. Elements work together to enrich the experience of the space, ultimately reflecting a thoughtful approach to design that respects both tradition and modern needs.

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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

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