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Geothermal Thermal Mass with Local Stone and Straw Insulation in Mountain Retreat

Authors:
Dil Phagami Magar, Abhishek Rai, Bikrant Pakhrin, Kalpana Rai
Geothermal Thermal Mass with Local Stone and Straw Insulation in Mountain Retreat
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Emphasizing geothermal thermal mass and utilizing locally sourced stone and straw insulation, the structure provides a resilient haven for trekkers amidst the mountainous landscape.
5 key facts about this project
01
Utilizes geothermal thermal mass for energy efficiency and climate resilience.
02
Features locally sourced stone for structural integrity and thermal properties.
03
Incorporates straw insulation to enhance sustainability and comfort.
04
Designed with a bent A-frame to optimize space and views.
05
Encourages community interaction through strategically placed communal areas.

## Project Overview

The functional structure is situated in a mountainous region of the higher Himalayan belt, where it engages with both the unique climatic conditions and the cultural characteristics of the area. The design is informed by the architectural traditions of local ethnic groups, including Tibetan and Indian influences, and aims to accommodate the needs of hikers and trekkers while ensuring the resilience of the building against extreme weather conditions.

## Site Strategy

The architectural strategy delineates the site according to altitude and cultural specifics. Three geographic regions have been identified to inform design choices: the Tamangs, residing above 3000 meters with traditional Tibetan architecture; and the Sherpas and Thakalis, located in the Himalayan foothills, who reflect their unique cultural practices in a design that is adaptive to environmental demands. Local materials are effectively integrated, promoting both structural durability and cultural relevance.

## Design Development

Key design features include the orientation that maximizes natural light and warmth, and a layout that follows the natural topography of the land. The building’s lower section is partially embedded into the earth, utilizing geothermal benefits for improved thermal efficiency. A clear separation between communal spaces and private quarters enhances usability and privacy. The design also incorporates large glass panels in the upper levels, ensuring unobstructed views of the landscape and deepening the connection with the natural surroundings.

## Materiality

Sustainable practices are evident in the choice of locally sourced materials. Timber forms the structural framework and finishing elements, while lime render and straw bale insulation enhance the building's thermal performance. The use of local stone contributes to the structure’s strength and thermal mass, allowing it to meld seamlessly into its environment. This material selection reinforces the project's commitment to environmental sustainability and cultural authenticity.

## Spatial Configuration

The spatial organization consists of multiple levels designed for efficiency. The ground level features communal spaces like the dining area and a shared hearth, fostering social interaction among users. Upper levels provide sleeping quarters with scenic views, while the lower levels accommodate utility and storage needs. Each area is intentionally structured to promote functionality and enhance the experience for visitors.

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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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