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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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Kingspan MICROHOME 2026: Building Less to Create More

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Competition organisers

The Kingspan MICROHOME 2026 competition invites architects and designers worldwide to rethink small-scale living by creating an off-grid, modular micro dwelling under 25 m². Now in its 11th edition, the contest emphasizes sustainable, innovative, and human-centered design that demonstrates how compact living can have a big impact.

With a €100,000 prize fund, entries will be evaluated for originality, efficiency, and their response to contemporary environmental and social challenges. The competition is open to everyone, with submissions allowed individually or in teams of up to four. Registration closes on 30 September 2026, and winners will be announced on 15 December 2026.

By celebrating creativity within strict limits, MICROHOME 2026 continues to push the boundaries of compact architecture and sustainable living.

MICROHOME 2026

Design a new concept of small-scale home and share a prize fund of 100,000€

100,000 € Prize Fund / Kingpsan Edition #11 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 September 2026

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