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Geothermal Structure Embraces Greenery with Concrete and Timber Elements

Authors:
Ho wing Tam, Nicole Law, Troy Vimalasatya rahardja, Adel Wahab
Geothermal Structure Embraces Greenery with Concrete and Timber Elements

Project in-detail

A walkable roof and an integrated greenhouse enhance a geothermal structure in Iceland, utilizing concrete and timber elements to create a sustainable space for visitors to experience the natural landscape.
5 key facts about this project
01
A walkable roof allows direct interaction with the surrounding landscape.
02
The greenhouse serves to integrate local vegetation within the design.
03
Geothermal heating utilizes the unique volcanic landscape for energy efficiency.
04
Concrete and timber elements create a distinctive organic aesthetic.
05
Drip irrigation systems effectively manage water resources for planting.

The design in the Myvatn region of Iceland highlights a thoughtful connection between the built environment and its natural surroundings. Drawing inspiration from the beauty of the Myvatn Nature Baths and the Hverfjall volcano, the overall concept blends the architecture with the landscape. The building features functional spaces for visitors, including a restaurant and a greenhouse that helps incorporate greenery into the stark environment.

Design Concept

At the heart of the design is a walkable roof that allows visitors to move across the structure and enjoy expansive views of the area. This feature enhances the experience of being in nature while connecting people to the landscape. Inside, gentle ramps navigate the sloped terrain and lead to the restaurant area. This layout fosters accessibility and promotes easy movement throughout the building, creating a comfortable environment for patrons.

Sustainability Features

The project prioritizes sustainability by utilizing geothermal heating. This system takes advantage of ground heat from the volcanic surroundings, providing efficient heating and hot water. The design also incorporates thermal mass in the concrete floor slab for passive warming, which helps reduce energy use. These systems demonstrate a commitment to responsible use of resources while maintaining comfort inside the building.

Material Selection

Materials play an important role in the overall design. The structure consists of a concrete shell supported by tree-like timber columns, contributing to the natural appearance while ensuring stability. Icelandic stone wool is used as insulation, making use of local materials and enhancing the building’s performance.

Water Management

Water resource management is another key aspect of the design. The building employs strategies for reusing wastewater, which helps conserve water. Drip irrigation for plants reduces water usage overall. Greywater collected from kitchens and bathrooms is treated through ozone purification, reflecting a practical approach to ecological considerations.

The greenhouse adds an essential element to the design, bringing greenery into the building. This not only enhances the visual appeal but also reinforces a connection to the natural environment. The result is a space that thoughtfully engages with its surroundings while providing a functional experience for visitors.

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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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