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Hempcrete Walls and Timber Trusses in a Geothermal Thermal Oasis

Authors:
Jimi Mckay, Ana Claver García
Hempcrete Walls and Timber Trusses in a Geothermal Thermal Oasis
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Constructed with hempcrete walls and timber trusses, the facility emerges as a sustainable oasis in Iceland’s geothermal landscape, offering visitors a unique thermal bathing experience enriched by its integration with nature.
5 key facts about this project
01
Hempcrete walls provide thermal insulation and environmental sustainability.
02
The facility incorporates cross-laminated timber for structural integrity and visual warmth.
03
Glass domes maximize natural light while offering panoramic views of the landscape.
04
Fixed planting beds are integrated into inner greenhouses to promote local flora.
05
Rammed earth foundations enhance durability and energy efficiency in geothermal conditions.

The Myvatn Nature Baths project is located in the geothermal area of Myvatn, Iceland. It aims to offer visitors a unique thermal experience while integrating with the surrounding landscape. The design fosters a connection between people and nature, highlighting sustainability and functionality. This carefully considered approach encourages exploration and interaction with the region's distinct geological features.

Design Concept
The layout consists of two phases that improve both user experience and construction management. Phase 01 includes a substantial portion of the necessary floor area built within a unified decking structure, providing guests with unobstructed views to the south. This strategy not only limits construction disruptions but also allows early access to key amenities, enriching the visitors' engagement with the landscape.

Structural Elements
The project features specific structural components that enhance its aesthetics and functionality. At the center, a glass dome allows natural light to illuminate the interior while creating a connection to the outside environment. The primary timber truss structure provides support and an organic feel, emphasizing the use of natural materials that resonate with the local context.

Sustainability Features
Incorporating inner greenhouses outfitted with fixed planting beds fosters sustainable practices that contribute to the therapeutic atmosphere of the baths. The choice of hempcrete for the outer support wall reflects modern ecological approaches, offering thermal mass and insulation. This material choice highlights a focus on energy efficiency while maintaining a design that is appropriate for the region.

Community Engagement
The main facility includes cross-laminated timber decking, which showcases contemporary construction techniques that balance structural strength with a lightweight atmosphere. Functional areas, such as kitchen units and perimeter seating, are positioned to encourage social interaction, inviting guests to gather and appreciate their surroundings. This thoughtful integration creates spaces that immerse users in the specific natural qualities of Myvatn.

With expansive views framed by the glass dome and the warmth of natural materials, visitors find themselves in an environment that emphasizes the relationship between architecture and nature. The overall design aims to enhance the experience of the landscape while providing comfort and functional space for all who visit.

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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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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.

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

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
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Final registration deadline 30 October 2025

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