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Green Roofs and Cork Insulation in a Community Center Design

Author:
Robert Hannweber
Green Roofs and Cork Insulation in a Community Center Design
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The use of wood cladding and an extensive green roof creates a connection to the landscape, while integrated rainwater management enhances sustainability in a community center designed for social engagement.
5 key facts about this project
01
Wood cladding is designed to weather over time, enhancing its aesthetic distinctiveness.
02
The roof incorporates extensive planting to improve thermal performance and support local biodiversity.
03
Rainwater harvested through the planting design is stored for reuse, promoting sustainability.
04
Ventilation flaps allow passive cooling by circulating fresh air at night.
05
Cork insulation is utilized as a locally sourced material for improved energy efficiency.

The "heart of spirala" is located in Portugal and serves as a community center designed to blend with its natural surroundings while meeting the needs of local residents. The vision is to minimize environmental impact through thoughtful architecture that encourages social interaction. The design integrates outdoor spaces and functionality, creating an inviting atmosphere for various community activities.

Materials and Aesthetic

An important aspect of the design is the exterior wood cladding. This material is chosen not only for its visual appeal but also for its ability to change over time. As it weathers, it develops a unique character that reflects the surrounding environment. This approach highlights a strong connection between the building and its setting, enhancing the overall experience for visitors. The choice of locally sourced materials supports sustainability and creates a sense of belonging within the community.



Roof Integration

The roof features an extensive planting strategy, allowing it to connect with the landscape around it. This green roof serves multiple purposes. It improves the building's thermal performance while promoting local plant life. The planted areas contribute to biodiversity and create a natural buffer that enhances the environment. This thoughtful integration helps the community center feel like a part of the landscape rather than an imposition upon it.



Community-Centric Spaces

The layout of the community center focuses on outdoor areas, especially the terrace. This space is designed for various activities, providing a shaded area that encourages social gatherings. Whether for events or casual meetups, the terrace promotes interaction among users. The arrangement of spaces reflects the goal of fostering a sense of community and belonging, making it accessible and inviting for all.



Sustainable Technologies

Sustainability is a core principle in the design. The building includes systems for rainwater harvesting, capturing water to be stored and reused. Potential installation of photovoltaic panels on the roof supports energy efficiency, allowing for solar energy capture. Ventilation flaps in the outer walls enhance cooling by letting fresh air in at night. This design keeps the indoor spaces comfortable and reduces energy consumption.

The insulation material used is cork, which is locally sourced and known for its thermal properties. This choice emphasizes environmental responsibility while ensuring comfort for occupants. Overall, the "heart of spirala" reflects a commitment to creating a meaningful space that is responsive to both community and environment.

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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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