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Rooftop Rainwater Collection and Photovoltaic Integration in Compact Timber Living Spaces

Authors:
Micah Lund, Amy Wu
Rooftop Rainwater Collection and Photovoltaic Integration in Compact Timber Living Spaces

Project in-detail

Incorporating a rooftop garden with rainwater harvesting and photovoltaic panels, this compact living space efficiently utilizes two parking stalls to create a sustainable residential environment.
5 key facts about this project
01
Utilizes two adjacent parking stalls as a functional residential footprint.
02
Incorporates a rooftop garden to enhance biodiversity and sustainability.
03
Features a rainwater collection system for resource-efficient living.
04
Employs cross-laminated timber panels for structural integrity and insulation.
05
Integrates low e-glazed sliding doors for optimized natural light and ventilation.
DoubleSpace is an architectural design project that transforms two standard parking stalls into a compact, multifunctional living space. Located in a commercial context, such as near Walmart locations, this project represents a practical response to urban housing challenges. By utilizing underused parking areas, DoubleSpace addresses the pressing need for affordable housing in urban and suburban settings. The spatial footprint of approximately 25 square meters is efficiently used, highlighting the architecture's focus on functionality and sustainability.

The primary function of DoubleSpace is to provide a livable environment that includes essential amenities such as a bedroom, kitchen, dining area, and bathroom facilities. The design prioritizes natural light and ventilation through the strategic placement of skylights and sliding doors, which minimize reliance on artificial lighting and promote energy efficiency. The interior layout is marked by flexible furniture solutions that adapt to the residents' varying needs, showcasing an innovative approach to compact living.

Innovative Design Approaches

DoubleSpace sets itself apart from typical residential designs through its unique spatial efficiency and multifunctionality. The project's architecture embraces adaptability, with movable partitions and smart storage solutions that optimize the limited space. This design focuses on minimizing clutter and maximizing usability, aligning with modern urban living's necessities.

The integration of sustainable practices further distinguishes DoubleSpace. The rooftop garden not only enhances the aesthetic appeal but also includes a rainwater collection system and photovoltaic panels for energy generation. This eco-conscious approach reflects a commitment to sustainability in urban architecture, highlighting materials like insulated wood finishes, rigid insulation, and low e-glazed glass that contribute to energy efficiency without compromising aesthetics.

Material and Structure

The architectural materials selected for DoubleSpace are both functional and sustainable. The roof assembly features components such as metal mesh sheathing, waterproofing layers, and polycarbonate cladding, ensuring durability while providing thermal insulation. The wall assembly incorporates insulated finishes and steel framing, creating a robust structure capable of withstanding urban environmental conditions.

Inside, the project employs environmentally friendly finishes that promote indoor air quality. The use of porcelain tile flooring in wet areas ensures ease of maintenance, which is crucial for compact living spaces. DoubleSpace ultimately illustrates a thoughtful balance between form and function, making it an exemplary model for modern urban infill housing.

For a comprehensive understanding of the architectural elements behind DoubleSpace, consider exploring the architectural plans, architectural sections, and architectural designs associated with the project. These documents provide deeper insights into the innovative architectural ideas that define this unique living space.
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MICROHOME
MICROHOME
100,000 € Prize Fund / Kingpsan Edition #10
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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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