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Bamboo Walls and Greywater Systems in a Mountain Retreat

Author:
Broby Leeds
Bamboo Walls and Greywater Systems in a Mountain Retreat
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Incorporating bamboo walls and a greywater recycling system, the structure harmonizes with its mountainous environment while serving as a retreat for guests seeking tranquility.
5 key facts about this project
01
Bamboo and cork materials used for exterior wall panels enhance sustainability.
02
The greywater recycling system repurposes water for toilet flushing.
03
Stilt foundation design minimizes landscape disruption on uneven terrain.
04
Multiple threshold options allow for adaptable use in various weather conditions.
05
Strategically placed windows maximize natural light and scenic views.

Twoferlar is located in the mountainous region of Portugal, overlooking the Rio Zêzere. It serves as a space for guests visiting Val Des Moses, focusing on the balance between communal and private experiences. The design involves two mirrored guest areas separated by a shared bathroom that also collects rainwater and grey water. This setup fosters social interaction while maintaining individual privacy, allowing guests to enjoy their surroundings in a serene environment.

Design Integration with the Landscape

The layout encourages movement around the building, promoting natural circulation. The placement of windows and openings enhances the connection between the interior and the exterior, ensuring that light filters into the space while providing views of the landscape. This thoughtful integration allows the structure to coexist with the natural features, reinforcing the overall concept of balance.

Adaptive Architectural Features

Twoferlar incorporates adaptable design elements. The use of different thresholds, such as shutters and awnings, allows the space to adjust to varying climatic conditions. The main entrance can be fully closed for security during storms, half-closed for privacy while allowing fresh air, or completely open for unobstructed views. This versatility supports different needs and enhances the comfort of the guests.

Sustainable Material Choices

The building employs a stilt foundation to address the challenges posed by the uneven terrain while preserving the surrounding ecosystem. Timber framing, lumber trusses, and concrete piles provide structural support while keeping the construction lightweight. Materials like earth thigh roofing tiles, bamboo, and cork for the exterior walls reflect a commitment to sustainability. Solid oak flooring adds warmth to the indoor spaces, creating a welcoming environment.

Water Management Strategies

An important feature of the design is its approach to water management. The roofs are set up to capture rainwater, directing it for use in showers and filtering it into a grey water system. This allows water to be reused for flushing toilets, showing a practical method of resource management. The design effectively combines functionality with an environmental awareness, ensuring that everyday actions support sustainability.

The arrangement of spaces and the choice of materials in Twoferlar come together to create a harmonious connection with nature. Each element is carefully considered to enhance the experience for guests, inviting them to immerse themselves in a tranquil setting that respects both the landscape and their personal needs.

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Kingspan MICROHOME 2026: Building Less to Create More

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Competition organisers

The Kingspan MICROHOME 2026 competition invites architects and designers worldwide to rethink small-scale living by creating an off-grid, modular micro dwelling under 25 m². Now in its 11th edition, the contest emphasizes sustainable, innovative, and human-centered design that demonstrates how compact living can have a big impact.

With a €100,000 prize fund, entries will be evaluated for originality, efficiency, and their response to contemporary environmental and social challenges. The competition is open to everyone, with submissions allowed individually or in teams of up to four. Registration closes on 30 September 2026, and winners will be announced on 15 December 2026.

By celebrating creativity within strict limits, MICROHOME 2026 continues to push the boundaries of compact architecture and sustainable living.

MICROHOME 2026

Design a new concept of small-scale home and share a prize fund of 100,000€

100,000 € Prize Fund / Kingpsan Edition #11 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 September 2026

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