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Rainwater Harvesting Cabin with Cross-Laminated Timber and Rock Wool Insulation

Author:
Martin Eggel
Rainwater Harvesting Cabin with Cross-Laminated Timber and Rock Wool Insulation
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Incorporating cross-laminated timber and rock wool insulation, the design facilitates rainwater harvesting while promoting a tranquil environment for meditation.
5 key facts about this project
01
The circular design eliminates traditional front-back orientation.
02
A central water tank supports rainwater harvesting.
03
Cross-laminated timber provides structural stability and sustainability.
04
Wooden slats offer sun protection and privacy.
05
The meditation cabin connects a conditioned interior with a covered terrace.

The design project focuses on the idea of circularity, which influences both its shape and function. Set in an environment that emphasizes natural surroundings, the building reflects concepts of unity and continuity. The circular form eliminates rigid distinctions like front or back, creating a space that encourages free movement and interaction among users.

Design Concept

This architecture integrates closely with its surroundings. The circular shape helps the building fit well into different geographical contexts, illustrating an essential principle of sustainable design. This adaptability allows it to blend in with the landscape while addressing the specific needs of the site.

Structural Features

The structure is elevated on pillars, adding to its versatility. This elevation helps the design respond well to various terrains and practical needs. It highlights a thoughtful approach to creating a space that balances innovation with functionality.

Interior Configuration

One notable aspect is the meditation cabin, crafted to provide a calm environment. This space features a controlled interior that flows into a covered terrace, linking indoors with the outdoors. A central storage area incorporates a water tank for collecting rainwater, which supports a sustainable approach to managing water resources.

Materials and Sustainability

Cross-laminated timber boards and steel supports form the main structure, combining durability with alignment to sustainability goals. Rock wool is used for insulation, improving energy efficiency, while clay plaster serves as an appealing finish. These material choices emphasize a commitment to minimizing environmental impact while maintaining both functionality and aesthetic value.

Natural light is carefully directed into the meditation cabin through well-placed openings, creating a peaceful interior that encourages moments of reflection and stillness.

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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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Competition organisers

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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