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Clay Walls and Greywater Recycling in a Sustainable Yoga Retreat

Authors:
Diana Schcolnik Goren, Ganit Kauffmann
Clay Walls and Greywater Recycling in a Sustainable Yoga Retreat
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With insulated clay walls and a greywater recycling system, the design promotes ecological sustainability while serving as a dedicated space for yoga practice within its serene natural setting.
5 key facts about this project
01
Unique passive heating strategies enhance energy efficiency.
02
The design includes a dedicated outdoor terrace for social interaction.
03
Rainwater and dew harvesting systems optimize water use.
04
Insulated clay walls provide excellent thermal mass.
05
The project minimizes site disturbance by reusing excavated soil.

The Yoga Solar House is located in Vale de Moses Yoga Retreat in Portugal. It serves as a space for yoga practice while blending with the surrounding nature. The design focuses on sustainability and energy efficiency, with a concept centered around maximizing sunlight and reducing energy use. The structure provides an environment that encourages relaxation and mindfulness.

Orientation and Form

The building is strategically oriented to take advantage of the sun’s path. The main façade faces west, allowing significant winter sun exposure while offering shade from the hot summer sun. This thoughtful orientation enhances the comfort of users and employs passive heating strategies essential for maintaining energy performance.

Functional Zoning

The Yoga Solar House consists of two main volumes. The practice area is located to the west, while the service area, which includes the kitchen, showers, and toilets, is on the east. This clear division of functions helps organize the space effectively. Between these two volumes lies an outdoor terrace that serves as a social area, encouraging interaction among users and creating a sense of community.

Material Considerations

The project incorporates insulated clay block walls and a concrete ceiling. These materials are chosen for their structural strength and thermal mass. By selecting these options, the design supports durability and energy efficiency, optimizing the building’s performance. The material choices reflect a commitment to thoughtful and sustainable design.

Water Management Strategies

An important feature of the Yoga Solar House is its water management system. It uses a combination of rainwater and dew harvesting alongside a greywater recycling process. This design promotes resource use efficiency and aligns with ecological sustainability. Through these strategies, the building minimizes its environmental impact and utilizes local climatic conditions effectively.

The sloped roof of the Yoga Solar House follows the natural contours of the cliff. This design element not only integrates the building with its landscape but also harnesses solar energy for effective energy generation.

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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.

Buildner's Unbuilt Award 2025

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

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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