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Thermal Mass and Natural Ventilation in a Rammed Earth Home Design
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Constructed with rammed earth and complemented by natural ventilation strategies, this dwelling maximizes environmental synergy while providing a functional living space in a challenging desert climate.
5 key facts about this project
01
Utilizes rammed earth construction for thermal mass and durability.
02
Features a central courtyard designed for communal interaction and natural cooling.
03
Employs strategically placed overhangs to optimize sunlight and reduce heat gain.
04
Integrates water features that enhance cooling and connect residents to the environment.
05
Incorporates a bioclimatic design approach to maximize energy efficiency and comfort.

## Project Overview

**Project Name:** Terra Lumina
**Location:** Arizona, USA

Terra Lumina is designed to respond to the climatic and geographical conditions of Arizona, characterized by intense sunlight and fluctuating temperatures. The project integrates functional design elements with sustainable practices, aiming to enhance occupant comfort while reducing environmental impact. The layout thoughtfully aligns with the sun's trajectory, optimizing the use of natural light throughout the day.

### Spatial Strategy and Organization

The design features a central courtyard that serves as the core of the residence, surrounded by various functional spaces. This courtyard promotes communal interaction and facilitates natural ventilation, while expansive views from living and dining areas invite the landscape indoors. Private spaces, including bedrooms and bathrooms, are strategically positioned to ensure privacy without sacrificing access to natural light and airflow. The incorporation of cylindrical forms allows for fluid transitions between spaces, enhancing the overall spatial experience.

### Material Selection and Sustainability

Terra Lumina employs a range of materials that emphasize its connection to the local environment and its commitment to sustainability. Key materials include rammed earth, which provides thermal mass for temperature regulation, and wooden beams, which add structural integrity and warmth. Natural stone is utilized in seating and food preparation areas, reinforcing the relationship between occupants and the surrounding landscape. The project also incorporates innovative features such as reflecting pools that contribute to environmental comfort and a dynamic lighting system that adjusts to varying daylight conditions, enhancing energy efficiency and occupant well-being.

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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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