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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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MICROHOME 2026
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The Next House: USA — A Global Call to Reimagine the American Suburb

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Competition organisers

Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

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