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Rainwater Harvesting and Passive Cooling in a Space Optimized with Thermal Mass and Natural Wood Finishes

Author:
Maitė Bignardi Cervantes
Rainwater Harvesting and Passive Cooling in a Space Optimized with Thermal Mass and Natural Wood Finishes

Project in-detail

Combining a rainwater harvesting system with passive cooling strategies, this residence utilizes thermal mass and natural wood finishes to create an environmentally responsive living space.
5 key facts about this project
01
Impluvium design integrates a rainwater catchment system for improved water management.
02
Orientation maximizes daylight while minimizing heat exposure throughout living spaces.
03
Use of charred wooden shingles enhances durability and reduces maintenance needs.
04
Thermal mass from concrete contributes to energy efficiency and temperature stabilization.
05
Passive cooling strategies are implemented with strategically placed shading devices.
The “Home of Shadows” is an architectural project designed for a residential context in Itu, São Paulo. The project focuses on creating a sustainable living environment that harmonizes with the local climate. Its design emphasizes the use of natural resources, efficient spatial organization, and innovative climate-responsive strategies. The building’s layout and materiality are carefully selected to enhance energy efficiency and occupant comfort.

The architectural design employs a unique orientation with the structure primarily facing north, enabling optimal daylight penetration. This orientation allows for adaptable living spaces, with distinct functions assigned to specific areas based on sun exposure. Wet areas are positioned to the south to manage humidity, while bedrooms situated to the east capture morning light. The kitchen, central to daily activity, is strategically placed to foster warmth and accessibility.

Sustainable features are integral to the project, with a rainwater catchment system designed to enhance resource management and create an engaging experience of water within the living environment. This element not only serves a practical function but also contributes to the overall aesthetic of the home, blurring the line between indoor and outdoor spaces.

Innovative Design Approaches

A notable aspect of the “Home of Shadows” is its emphasis on balancing light and shadow within the architectural framework, achieved through the deliberate placement and composition of windows and shading devices. The integration of window blinds throughout the structure allows for controlled light entry and contributes to passive cooling, reducing reliance on artificial heating and cooling systems.

The design also breaks away from conventional cubic forms to create an organic layout that responds to the unique topography and environmental conditions of the site. This approach fosters a sense of tranquility and connection to nature, promoting well-being among residents. The choice of materials, likely including reinforced concrete, glass, wood, and metal, supports not only the aesthetic but also the functionality and durability of the building.

Climate-Responsive Design Features

The architecture of the “Home of Shadows” is a direct response to the hot climate of Itu, featuring elements that promote energy efficiency while maintaining comfort. The careful orientation of spaces, combined with the use of passive strategies like daylighting and ventilation, provides a comfortable indoor environment throughout the year.

In addition, the project’s integration of sustainable building practices reflects a growing trend in residential architecture, focusing on eco-friendly materials and systems that minimize environmental impact.

For further insights into the architectural plans, sections, and overall design approach, explore the project presentation to understand how the elements work together to create a cohesive and functional residential environment.
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100,000 € Prize Fund / Kingpsan Edition #10
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100,000€ Prize / 2025

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

Competition organisers

The 10th edition of the MICROHOME architecture competition invites architects and designers from around the world to explore the possibilities of compact, sustainable living. Hosted by Buildner in collaboration with Kingspan and Hapi Homes, this special edition challenges participants to design an off-grid, modular microhome for a young professional couple, with a maximum floor area of 25 m². Designs should prioritize innovation, efficiency, and real-world feasibility. 

A total prize fund of 100,000 € will be awarded, including three main prizes, the Kingspan Award, and the Hapi Homes Award, which will grant 15,000 € and lead to the construction of the selected design. The final registration deadline is September 25, 2025, and winners will be announced on Decebmer 9, 2025. For full competition details and submission guidelines, visit microhome.info.

Microhome

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

100,000 € PRIZE FUND / KINGPSAN EDITION #10 IDEAS COMPETITION
Prize 100,000 € + Potential realisation
Eligibility Open to all
Early bird registration deadline 22 May 2025
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