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Compressed Earth Blocks and Rainwater Harvesting in a Sustainable Community Shelter

Author:
Nabil Shabir Randeree
Compressed Earth Blocks and Rainwater Harvesting in a Sustainable Community Shelter

Project in-detail

Utilizing compressed earth blocks and a rainwater harvesting system, this sustainable community shelter offers an adaptable living environment designed to address the housing needs of low-income families.
5 key facts about this project
01
Utilizes locally sourced compressed earth blocks for structural integrity and insulation.
02
Incorporates a dual water management system for efficient rainwater harvesting and greywater reuse.
03
Features a flexible interior layout that adapts to various family sizes and living arrangements.
04
Includes integrated community gardens to promote food security and social interaction.
05
Design enhances natural ventilation and temperature regulation through strategic orientation and openings.

### Overview

Located in South Africa, the Mud House project addresses critical issues of resource scarcity and housing accessibility, developed between 2015 and 2020 during a significant water crisis. This initiative presents a prototype for sustainable living, utilizing local materials to construct affordable housing that minimizes environmental impact. The design focuses on promoting community resilience and fostering a collaborative environment among residents.

### Spatial Efficiency

The architectural layout emphasizes compactness and functionality, enhancing spatial efficiency throughout the home. Open living spaces are created to adapt to the diverse needs of residents, with designated areas for communal activities, relaxation, and private living. This strategic arrangement facilitates an optimal flow within the household, encouraging interaction while maintaining private zones.

### Sustainable Material Use

The Mud House employs a variety of sustainable materials that underscore its commitment to environmental responsibility. Compressed earth blocks, sourced from local soil, form the primary walls, offering excellent insulation and temperature regulation. Timber frames, obtained through sustainable practices, provide structural support, while sandbags serve as durable insulation elements. The design also incorporates a green roof system to promote biodiversity and effectively manage water runoff. Each material choice is intentional, aligning with both budgetary considerations and environmental sustainability.

### Water and Energy Management

Effective water management is integral to the Mud House, featuring systems that capture, filter, and recycle resources. A rainwater harvesting system collects runoff from sloped roofs into storage tanks, complemented by greywater recycling for household activities, which reduces waste. The architectural design incorporates natural ventilation through high ceilings and strategically placed openings to enhance airflow, decreasing dependence on mechanical cooling. Orientation and thermal mass principles optimize natural light and passive heating, further reducing 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

Buildner's Unbuilt Award 2025
Buildner's Unbuilt Award 2025
100,000€ Prize / 2025
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Denver Affordable Housing Challenge
Affordable Housing Series 19th Edition
The Architect's 
Chair
The Architect's Chair
Take a seat and make a statement! Edition #4
MICROHOME
MICROHOME
100,000 € Prize Fund / Kingpsan Edition #10
Kinderspace
Kinderspace
Architecture for Children’s Development #3
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