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Rooftop Greenhouse with Rammed Earth and Wooden Fiber Insulation

Authors:
Nicholas Diddi, Riccardo Cosco
Rooftop Greenhouse with Rammed Earth and Wooden Fiber Insulation

Project in-detail

A rooftop greenhouse enhances a compact two-storey living space constructed with rammed earth and wooden fiber insulation, promoting sustainable urban living through adaptable design and community engagement.
5 key facts about this project
01
Double-height living area enhances spatial dynamics and connectivity.
02
Rooftop greenhouse facilitates urban agriculture and green interaction.
03
Service areas are integrated within a unique "box in the box" design.
04
80% of the materials used are bio-based, promoting sustainability.
05
Mezzanine level offers versatile use as a workspace or storage.

Microhome 2020: H-EART-H CYCLE presents a thoughtful approach to sustainable living in urban settings. The design features a compact two-storey structure, focused on creating a functional space that interacts positively with nature. The project embodies a concept that connects the rhythms of human life with the cycles of the environment.

Design Concept

The layout of the structure highlights a double-height living area, which brings a sense of openness and light into the home. This central space encourages social interaction and makes the home feel larger than its physical footprint. Surrounding the living area, service spaces such as the kitchen, bathroom, and entrance are integrated within a "box in the box" design. This strategy efficiently organizes space while maintaining the comfort needed for everyday living.

Spatial Flexibility

Above the living area, a mezzanine provides additional flexibility within the home. This space can serve multiple functions, working as an open bedroom, storage area, or workspace. Residents can easily adapt it to fit their routines. A small balcony extends from this level, leading to an outdoor staircase that connects to the greenhouse on the roof. This connection reinforces the relationship between indoor and outdoor living.

Material Use and Sustainability

The design prioritizes sustainable practices through careful material selection. A wooden framework supports the structure, while wooden fiber insulation helps to regulate temperature. The exterior is finished with prefabricated panels made of rammed earth, connecting the structure to natural materials. This choice reflects a commitment to reducing environmental impact while also offering durability.

Technical Features

Visible on the exterior are various technical installations, such as pumps, tanks, and solar panels. This placement not only improves efficiency but also allows for easy access for maintenance. The project uses bio-based materials for 80% of its construction, showcasing an effort to promote eco-friendly building practices. This approach offers residents the potential for a self-building experience, engaging them more closely with their living space.

At the top, the greenhouse stands as a functional garden area, enabling residents to grow plants and engage with nature. It serves as a small urban farm, fostering a deeper connection to the environment. This space exemplifies the integration of living with green practices, emphasizing the importance of nature in contemporary urban life.

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MICROHOME 10: Celebrating Small-Scale Living with €100,000 Prize Fund and Kingspan’s Innovation

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Competition organisers

The MICROHOME 10 competition invites participants to submit visionary designs for off-grid, modular microhomes that push the limits of sustainable, small-scale living. Organised by Buildner in partnership with Kingspan and Hapi Homes, this tenth edition sets the challenge of designing a dwelling for two people within a maximum floor area of 25 m², encouraging bold solutions adaptable to any urban or rural location. The competition continues Buildner’s mission to foster innovative approaches to compact, energy-efficient housing that can address pressing global challenges.

This year’s edition offers a generous total prize fund of €100,000, including the Kingspan Award for designs that integrate high-performance Kingspan products and the Hapi Homes Award for a project selected for real-world construction. In addition to cash prizes, the winners gain international exposure through Buildner’s media partnerships, publications, and a dedicated MICROHOME magazine, further amplifying their ideas to the wider architectural community.

Key dates for MICROHOME 10 include the closing date for registration on 25 September 2025, the submission deadline on 29 October 2025 (11:59 p.m. London time), and the announcement of winners on 9 December 2025. These milestones ensure participants have clear timelines to develop and present their concepts, with early registration discounts available to support students and emerging designers worldwide.

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
Final registration deadline 25 September 2025

Enter an open architecture
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