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Biodigester-Enabled Spa Constructed With Locally Sourced Straw and Clay

Authors:
Xing Yue Ch'ng, Jean Kian
Biodigester-Enabled Spa Constructed With Locally Sourced Straw and Clay

Project in-detail

Constructed using locally sourced straw and clay, this spa integrates a biodigestion system to maximize sustainability while providing a tranquil environment for wellness and rejuvenation.
5 key facts about this project
01
Constructed with locally sourced straw, enhancing environmental sustainability.
02
Incorporates a biodigestion system to convert organic waste into energy.
03
Features therapy rooms designed for both individual and communal experiences.
04
Utilizes clay and lime for natural plastering, promoting a local aesthetic.
05
Includes outdoor hot tubs seamlessly integrated into the natural landscape.

## Proposed Architectural Spa Design in Latvia

The spa and guesthouse is situated in the central region of Latvia, designed to serve as a retreat that combines traditional Latvian wellness practices with modern architectural solutions. The intent is to create a rejuvenating environment that fosters a reconciliation between the built space and the natural landscape. This design emphasizes sustainability through the careful selection of materials and innovative environmental systems, offering a distinctive experience for guests.

### Spatial Journey

The design facilitates a carefully curated sequence of spaces that guide users through various wellness rituals. Guests begin with invigorating outdoor showers, transition to restorative therapy rooms, and enjoy the traditional experience of a sauna, followed by rejuvenation in a natural swimming pond. Communal outdoor hot tubs encourage social interaction, enriching the overall wellness experience. Each space is designed to promote relaxation while establishing a connection to the natural surroundings.

### Material and Environmental Strategies

The project prioritizes the use of local, sustainable materials. Earth serves as a primary structural element, helping the building harmonize with its environment. Timber, clay, lime, limestone, and straw are incorporated to create energy-efficient and environmentally friendly structures.

An energy loop system is implemented to manage organic waste, converting it into energy to support the spa’s operations. Integrated water management systems capture rainwater and recycle natural pond water, reducing reliance on freshwater resources. Advanced waste management techniques are employed throughout construction and daily operations to minimize environmental impact. Additionally, the use of earth and thermal mass aids in regulating internal temperatures, enhancing thermal performance while lowering energy consumption.

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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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