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Asymmetrical Roof Structure Enhances Community Space for the Mentawai Tribe

Authors:
Bryan Zachrie, Orry Junior, Stephanus Christo Probojati
Asymmetrical Roof Structure Enhances Community Space for the Mentawai Tribe
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An asymmetrical roof structure defines a community space that fosters cultural connection and sustainability for the Mentawai tribe while incorporating eco-conscious practices and traditional living methods.
5 key facts about this project
01
Asymmetrical roof design reflects cultural evolution.
02
Utilizes local wood resources to minimize carbon footprint.
03
Incorporates a circular water system for sustainable practices.
04
Amphitheater space enhances communal gatherings and rituals.
05
Biodegradable soap used to recycle greywater for irrigation.

The project focused on the Mentawai tribe in the Mentawai Islands of West Sumatra, Indonesia, combines traditional cultural elements with modern design. It aims to create a living space that meets the needs of the younger generation while addressing the challenges posed by modernization. The design reconsiders the traditional Uma, promoting an idea of coexistence between architecture and nature while fostering community interaction.

Design Concept

The design introduces a contemporary take on the Uma, moving away from the traditional symmetrical roof to an asymmetrical form. This change helps the new dwelling stand apart from older models and reflects the values of the present day. By doing so, it honors the tribe’s heritage while supporting modern living needs.

Spatial Organization

The arrangement of spaces balances private areas for daily life with communal spaces for social interaction. Two residents can live comfortably alongside their guests, while special areas for community rituals and ceremonies are also included. A proposed amphitheater serves as a venue for gatherings, reinforcing the community's social cohesion. This layout maintains functionality without losing cultural importance.

Sustainability Features

Sustainability is a core aspect of the design. A circular water system utilizes rainwater as the primary source, with well water available when needed. The use of biodegradable soap made from local plants enables greywater recycling for irrigation. These practices reduce water waste and align with the sustainable living approach of the Mentawai people.

Energy Strategy

The energy plan includes photovoltaic panels and a radiant floor cooling system. The solar panels generate electricity to meet the dwelling's needs, promoting energy independence. Passive cooling is achieved through roof ventilation, which reduces the need for mechanical cooling. This approach creates a more comfortable indoor climate while minimizing energy consumption.

The design features an asymmetrical roof that signifies a shift toward a new period for the Mentawai tribe, maintaining a connection to their cultural identity while embracing the present.

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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.

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

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
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