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Rammed Earth Walls and Evaporative Cooling in a Community-Focused Residence

Author:
Vita Attrill
Rammed Earth Walls and Evaporative Cooling in a Community-Focused Residence
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Rammed earth walls and a butterfly-shaped roof optimize natural ventilation while reducing heat gain, creating a sustainable residence that fosters community interaction in rural Queensland.
5 key facts about this project
01
Rammed earth construction maximizes thermal mass for energy efficiency.
02
A butterfly-shaped roof enhances natural ventilation and solar harvesting.
03
The sunken floor design integrates seating and promotes social interaction.
04
Rainwater harvesting systems support sustainable water management.
05
Strategic openings facilitate cooling breezes, reducing reliance on mechanical systems.

The design located in Charters Towers, Queensland, responds to the challenges posed by the local climate and the need for community connection in a rural setting. It aims to create a living space that balances comfort and sustainability. By focusing on heat mitigation and promoting social interaction, the design taps into the essence of rural life while addressing contemporary needs.

Heat Mitigation Strategies

A key feature is the butterfly-shaped roof, which plays an essential role in keeping the interior cool. This design allows hot air to escape through clerestory openings, improving natural ventilation. Additionally, the 2.5-meter overhang protects the exterior walls from direct sunlight, effectively reducing heat gain during the summer months. This focus on thermal comfort is particularly important in an area known for its high temperatures and humidity.

Thermal Performance

The sunken floor enhances the building's thermal performance by maximizing the advantages of thermal mass. Using rammed earth as a primary material allows the structure to maintain stable temperatures throughout the year. This choice not only helps in energy efficiency but also contributes to a comfortable living environment. When combined with local clay tiles, the design further improves thermal properties while maintaining an earthy aesthetic.

Natural Ventilation and Social Spaces

Natural ventilation is another important aspect of the design. The arrangement of openings invites prevailing breezes to flow through the space. By incorporating a wind funnel, the design effectively directs airflow over water features, promoting evaporative cooling. The layout emphasizes social spaces, with the sunken floor serving as functional seating that encourages interaction among residents, addressing the isolation often felt in rural communities.

Water Management and Sustainability

Efficient water management is integrated into the design, which includes rainwater harvesting and grey water recycling systems. These practices significantly decrease water use and enhance sustainability. By focusing on responsible resource management, the design supports the needs of its occupants while minimizing its environmental impact.

The overall result is a blend of practical living space and environmental awareness. The rammed earth walls not only provide thermal mass but also create areas for seating, promoting community and connection within the home.

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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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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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