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Conical Structure Framed with Cardboard Tubes and Enhanced by Aluminum Foam Panels

Authors:
Judith Cukier, Miguel Acosta, Juan Ramirez
Conical Structure Framed with Cardboard Tubes and Enhanced by Aluminum Foam Panels
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Framed by cardboard tubes and clad in aluminum foam, the conical structure optimizes natural light while fostering community interaction in a residential setting.
5 key facts about this project
01
Conical shape promotes natural light and enhances connection with the landscape.
02
Cardboard tubes provide structural support while being lightweight and recyclable.
03
Aluminum foam panels create a reflective façade that balances light distribution.
04
Built-in library and flexible gathering spaces foster community interaction.
05
Indoor and outdoor areas seamlessly blend for a cohesive living environment.

The Spirala Community Home project is located in Northern Portugal and aims to enhance the connection between its residents and their natural surroundings. The design focuses on creating comfortable and functional spaces that encourage interaction and community living. Inspired by the Fibonacci sequence, the building's conical shape promotes a fluid relationship with the landscape, allowing it to harmonize with its setting while prioritizing ecological values.

Sustainable Design Approach

The design integrates various elements to support its ecological goals. Vertically projected paper piles and non-pile paper tubes form the structural framework of the building, with different heights that create a sense of organic growth. Natural light plays an essential role, as wide-open folding doors invite the outdoors in, fostering an inviting atmosphere that encourages use of the exterior spaces.

Materiality and Structure

The project emphasizes the choice of materials, using cardboard tubes that are lightweight and recyclable for structural support. This decision reflects a commitment to sustainability. The materials also allow for efficient integration of necessary electrical and plumbing systems, maintaining the building's functionality without adding unnecessary weight.

Interior Space Planning

Community-focused areas are a key feature, including a built-in library and collaborative seating arrangements equipped with pull-down whiteboards. These multifunctional spaces serve to enhance social interaction among residents, reinforcing the idea of shared living. The indoor environment is made warm and welcoming with light beige wood and cork surfaces, encouraging gatherings and conversation.

Aluminum foam panels on the exterior contribute to light distribution and climate control within the building. By allowing natural light to filter through, these panels create a comfortable interior environment while enriching the overall aesthetic of the design, demonstrating a thoughtful balance between practical needs and visual appeal.

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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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