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Rainwater Harvesting and Straw Bale Insulation in a Biophilic Woodland Retreat

Authors:
Qingzhou Jiang, Sifei Mo
Rainwater Harvesting and Straw Bale Insulation in a Biophilic Woodland Retreat

Project in-detail

Combining straw bale insulation with engineered wood structures, the design emphasizes sustainability and ecological harmony, serving as a tranquil retreat for reflection and community engagement within a forested landscape.
5 key facts about this project
01
Features a rainwater harvesting system integrated into the design.
02
Utilizes straw bale insulation for enhanced thermal performance.
03
Incorporates biophilic design principles to connect occupants with nature.
04
Employs large glass panels to maximize natural light and forest views.
05
Includes flexible spaces that adapt to varied communal activities.

### Project Overview

The Forest Retreat is situated in a densely wooded area, designed as a sanctuary for meditation, reflection, and relaxation. The primary intent of the design is to foster a harmonious relationship between occupants and the surrounding environment while minimizing ecological disruption. The project strategically occupies the northern edge of the site, where an open area to the south allows for optimal natural light and visual connectivity to the forest.

### Spatial Organization and Functionality

The main floor plan consists of distinct functional areas, including a flexible common area that accommodates both communal gatherings and individual reflection. Private quarters are designed for comfort and tranquility, each providing direct access to nature. Utility spaces, such as a kitchen and bathrooms, are incorporated with a focus on simplicity and practicality. Curvilinear pathways extend from the building into the natural landscape, enhancing exploration and interaction between indoor and outdoor spaces.

### Materiality and Sustainability

The architectural form features interlinked volumes that create dynamic spatial transitions. A key element is the use of engineered wood products, including glulam beams and plywood, which reflect a commitment to sustainable construction practices. Insulating wall assemblies incorporate straw bales, promoting thermal efficiency and biogenic material use. The roof structure features reed and thatch, ensuring environmental compatibility while enhancing aesthetic appeal. Additionally, large windows provide expansive views of the forest and facilitate a transparent boundary between interior and exterior spaces. Rainwater harvesting, passive solar design, and strategically placed shading devices further underscore the project's environmental consciousness and energy efficiency.

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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
competition now

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