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Banana Fiber Roofing in Sustainable Community Housing

Authors:
Beatriz Coelho, Mariana Paoliello, José Ricardo Paoliello
Banana Fiber Roofing in Sustainable Community Housing
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Utilizing banana fiber roofing and a gray water biofilter system, the design integrates sustainable practices into community-oriented housing that addresses urban homelessness in São Paulo.
5 key facts about this project
01
Utilizes a gray water biofilter system integrated with community vegetable gardens.
02
Incorporates banana fiber roofing to enhance sustainability.
03
Constructed with cross-laminated timber for reduced carbon footprint.
04
Includes a wet tower that houses solar heating infrastructure.
05
Designed to address homelessness in urban São Paulo through communal spaces.

Bananeira's House is located in São Paulo, Brazil, and focuses on addressing the pressing issue of homelessness in the area. The design consists of three blocks that serve different functions: social interaction, private living, and infrastructure. This thoughtful arrangement promotes sustainable living and community involvement, aiming to provide practical housing while being mindful of environmental impacts.

Design Concept

The social block includes spaces for cooking and gathering, encouraging connections among residents. The design emphasizes openness, with high ceilings that allow natural light to fill the spaces. In contrast, the private block is dedicated to sleeping and working areas, ensuring that residents have a peaceful and private environment. The careful angles and layout enhance both comfort and efficiency.

Infrastructure and Sustainability

The wet tower incorporates essential facilities, such as a bathroom and solar heating systems. This integration of necessary utilities supports the overall design, making daily living more convenient. A key feature is the "Bananeira Circle," a biofilter system that treats gray water and directs it to an area with banana trees. This design element not only manages waste but also promotes food production, linking practical solutions to environmental stewardship.

Materiality and Innovation

Material choices are a crucial part of the design. Cross-laminated timber (CLT) is used for its durability and carbon-negative properties. Wooden panels, coated with projected cork, serve to waterproof the structure. Translucent tiles made from recycled PET bottles contribute to natural lighting and energy efficiency. Braided banana tree leaves are also included in the roofing, enhancing air circulation and the overall ecological footprint.

Design Detail

Another important aspect of Bananeira's House is the inclusion of community vegetable gardens. These gardens address food security and provide fresh produce for residents. They also create opportunities for collaboration among inhabitants, fostering a sense of community as they work together in cultivating their food.

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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 €
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