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Vertical Rainwater Wall and Hempcrete Construction in a Self-Sufficient Microhome

Authors:
Sheena Gary, Surani Gunawardana, Carlos Montes
Vertical Rainwater Wall and Hempcrete Construction in a Self-Sufficient Microhome

Project in-detail

Harnessing rainwater through a vertical capture wall and constructed from sustainable hempcrete, this microhome exemplifies a self-sufficient living solution designed for modern environmental sensibilities.
5 key facts about this project
01
The home utilizes a vertical rainwater capture wall that also houses a wind turbine for energy generation.
02
Hempcrete is employed for its insulation properties, enhancing the building's sustainability.
03
Cross-laminated timber panels provide structural strength while minimizing environmental impact.
04
The design features a liquid desiccant waterfall for natural humidity control in the living spaces.
05
Integrated landscaping supports local biodiversity, creating a seamless connection between the home and its environment.
Vida Verde is an architectural project situated in the picturesque surroundings of Marbella, Spain. This microhome exemplifies a modern approach to sustainable living, proudly highlighting environmental responsibility in its design. The project represents a shift toward self-sufficient, eco-friendly architecture that not only serves as a residence but also aligns harmoniously with the natural landscape.

The primary function of Vida Verde is to provide a compact yet comfortable living space that operates independently from conventional utilities. This is accomplished through the integration of renewable energy sources and innovative building materials that significantly reduce the ecological footprint of the home. By focusing on off-grid capabilities, Vida Verde illustrates the potential for small-footprint living that does not compromise on quality or comfort.

At the heart of the design is a thoughtful arrangement of spaces that fosters an inclusive and functional environment. The layout skillfully delineates public and private areas, enhancing the sense of openness while also ensuring privacy where needed. Vertical concrete elements serve as structural supports and functional dividers, creating a seamless transition between different zones. The incorporation of significant features, such as a vertical rainwater capture wall, not only adds to the aesthetic value but also underscores the project’s commitment to sustainability. This wall is multifunctional, designed not only to collect rainwater but also to house a wind turbine and adjustable louvers that optimize indoor airflow, thus contributing to natural ventilation.

Material selection plays a crucial role in the architectural integrity of Vida Verde. The project prominently uses standing seam metal for the roof, which offers durability and helps regulate internal temperatures by reflecting sunlight. Lime plaster is employed for wall finishes, enhancing breathability and improving thermal insulation—a key consideration in the warmer climate of southern Spain. Cross-laminated timber forms the structural backbone of the home, noted for its strength and sustainability. The use of hempcrete, a composite of hemp and concrete, furthers the project's green initiatives, providing excellent insulation while promoting the use of renewable resources.

Unique design approaches are evident throughout Vida Verde, demonstrating a commitment to innovative architectural solutions. The layout incorporates a liquid desiccant waterfall within the private living area, which works effectively to dehumidify the air, a significant advantage in the humid coastal environment. This system functions as an integral part of the home's climate control strategy, reducing reliance on mechanical systems and promoting a healthier indoor air quality.

The architectural design prioritizes adaptability, highlighting efficient use of space. Multifunctional elements are a cornerstone of the project; for example, the kitchen features a pull-out counter that maximizes usability within a confined area. This flexibility in design is indicative of the potential for micro-living spaces to fulfill the diverse needs of contemporary lifestyles without excessive space.

In addition, Vida Verde is thoughtfully integrated with its surrounding ecosystem. The landscaped areas are designed to support local biodiversity, maintaining a balance between the built environment and nature. By choosing native plants, the project emphasizes sustainability and creates a seamless transition from indoor to outdoor spaces, enhancing the overall living experience.

Through its compelling architectural solutions, Vida Verde stands as a testament to the convergence of practicality and sustainability within modern architectural practices. It invites a dialogue about the evolution of residential design in response to environmental challenges and shifts in lifestyle preferences. Readers interested in architectural plans, sections, and innovative design ideas are encouraged to explore the project further to gain deeper insights into this effective model of contemporary micro-living. The thoughtful integration of architecture, design, and ecological consciousness in Vida Verde makes it a noteworthy reference in sustainable residential architecture.
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MICROHOME
MICROHOME
100,000 € Prize Fund / Kingpsan Edition #10
Kinderspace
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Architecture for Children’s Development #3
Buildner's Unbuilt Award 2025
Buildner's Unbuilt Award 2025
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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