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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

Project in-detail

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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MICROHOME 10: Celebrating Small-Scale Living with €100,000 Prize Fund and Kingspan’s Innovation

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Competition organisers

The MICROHOME 10 competition invites participants to submit visionary designs for off-grid, modular microhomes that push the limits of sustainable, small-scale living. Organised by Buildner in partnership with Kingspan and Hapi Homes, this tenth edition sets the challenge of designing a dwelling for two people within a maximum floor area of 25 m², encouraging bold solutions adaptable to any urban or rural location. The competition continues Buildner’s mission to foster innovative approaches to compact, energy-efficient housing that can address pressing global challenges.

This year’s edition offers a generous total prize fund of €100,000, including the Kingspan Award for designs that integrate high-performance Kingspan products and the Hapi Homes Award for a project selected for real-world construction. In addition to cash prizes, the winners gain international exposure through Buildner’s media partnerships, publications, and a dedicated MICROHOME magazine, further amplifying their ideas to the wider architectural community.

Key dates for MICROHOME 10 include the closing date for registration on 25 September 2025, the submission deadline on 29 October 2025 (11:59 p.m. London time), and the announcement of winners on 9 December 2025. These milestones ensure participants have clear timelines to develop and present their concepts, with early registration discounts available to support students and emerging designers worldwide.

MICROHOME

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

100,000 € Prize Fund / Kingpsan Edition #10 ideas COMPETITION
Prize 100,000 € + Potential realisation
Eligibility Open to all
Final registration deadline 25 September 2025

Enter an open architecture
competition now

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