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Cork-Insulated Retreat with Green Roofs Emphasizing Modular Design

Authors:
M Lema Barros, C Castelo Branco
Cork-Insulated Retreat with Green Roofs Emphasizing Modular Design
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Constructed using natural cork and chestnut wood, this eco/yoga retreat features a modular design with a green roof and advanced rainwater management systems, promoting sustainability within its serene setting.
5 key facts about this project
01
Cork cladding provides natural insulation and fire resistance.
02
Modular design allows flexible spatial arrangements.
03
Integrated blue-roof system facilitates rainwater management.
04
Radiant floor heating ensures energy-efficient climate control.
05
Natural materials minimize environmental impact and enhance aesthetics.

The design presents a contemporary interpretation of the primitive hut in Vale de Moses, functioning as an eco/yoga retreat. It aims to create a strong connection between human senses and the fundamental energies of nature. Inspired by local beehives known as "cortiços," the structure takes on a quadrangular form that fits naturally into the landscape while maintaining a minimalist design.

Functionality and Modularity
The design focuses on prefabrication, featuring a sturdy seismic structure that allows for easy assembly and disassembly. This modular setup makes it possible to adjust the layout, enabling units to be grouped or rearranged as needed. This flexibility accommodates changing requirements, ensuring that the space remains practical for its users.

Sustainable Design Strategies
Sustainability is a significant aspect, evident in the inclusion of a green roof that enhances insulation and supports biodiversity. Additionally, a Blue-roof System is integrated to capture and store rainwater, which aids in irrigation and fire safety. These strategies highlight the commitment to environmental responsibility and efficient use of resources.

Material Usage
Selected materials play an important role in the overall design. The exterior facade is made from Natural Expanded Cork Agglomerate, which provides thermal insulation and structural support. Inside, Natural Sweet Chestnut Wood (Castanea Sativa) is used for flooring, connecting the interior spaces with nature. Large areas of clear glass in the windows allow for natural light and open views of the surrounding environment.

Energy Efficiency
Energy efficiency is also a priority. A dry radiant floor system helps maintain comfortable temperatures throughout the year. Additionally, orientable photovoltaic and thermal solar hybrid panels are utilized to generate energy for lighting and water circulation. This approach emphasizes effective energy management, aligning with sustainable principles.

The design thoughtfully balances built spaces with nature, inviting interaction with the landscape through its functional and simple forms. Each element works together to create a serene environment, fostering a deeper connection between occupants and their natural surroundings.

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

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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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