Earth Construction: A Comprehensive Guide
About this book
Earth Construction: A Comprehensive Guide Hugo Houben and Hubert Guillaud (CRATerre-EAG) | Practical Action Publishing (Intermediate Technology Publications), London, 1994 | ISBN: 978-1-85339-193-4 Published by Intermediate Technology Publications (now Practical Action Publishing) in 1994, "Earth Construction: A Comprehensive Guide" by Hugo Houben and Hubert Guillaud of the CRATerre research center represents what many specialists consider the definitive technical reference on earthen construction. Originally composed in French as "Traité de Construction en Terre" and first published in 1989, the English edition brought the accumulated expertise of the International Centre for Earthen Construction at the École Nationale Supérieure d'Architecture de Grenoble (ENSAG) to a global professional audience. Over subsequent decades the text has been cited in thousands of academic papers and building standards documents across six continents, a measure of its enduring authority.
The book's ambition is encyclopedic: it aims to equip a wide range of practitioners—from policymakers and development planners to structural engineers, architects, technicians, and skilled tradespeople—with everything they need to understand, evaluate, and implement earthen construction responsibly. This deliberately broad intended audience shapes the book's organization, which moves from foundational science to practical application in a logical and accessible progression. The opening sections establish the context and rationale for earthen construction.
Approximately one third of the world's population lives in earthen dwellings, and in many developing regions raw earth remains the most abundant and economically accessible construction material available. The authors frame earthen construction not as a poverty technology to be replaced, but as a sophisticated building tradition worthy of scientific analysis and contemporary application. They situate the reader within a global historical continuum of earthen architecture, from the ancient cities of the Middle East and North Africa to contemporary sustainable building projects in Europe and the Americas.
The technical heart of the book begins with an extensive treatment of soil science as it applies to construction. Houben and Guillaud explain the mineralogical and granulometric characteristics that determine a soil's behavior: the role of clay minerals in binding, the plasticity index, particle size distribution, and organic content. A full chapter is devoted to soil identification—both field methods (jar tests, ribbon tests, odor tests, visual examination) and laboratory procedures (sieve analysis, hydrometer tests, Atterberg limits).
This foundation ensures that practitioners can evaluate raw material quality before committing to a construction method, a critical step that is often neglected in informal earth construction. Soil stabilization—the addition of materials to improve or modify earth's natural properties—is covered comprehensively. The authors evaluate stabilizers including lime, cement, pozzolans, bitumen, natural fibers, and various industrial by-products, explaining the chemical mechanisms by which each functions, the proportions typically required, and the performance gains and trade-offs each entails.
Importantly, the authors also address the economic and environmental implications of different stabilization strategies, recognizing that an additive appropriate in one context may be unavailable or economically prohibitive in another. The survey of construction methods constitutes the most expansive portion of the book. Houben and Guillaud catalogue approximately twelve primary techniques for building with earth, providing for each a description of the method, its historical distribution, the soil types best suited to it, the tools and equipment required, and the typical structural and thermal performance achievable.
Techniques covered include: rammed earth (pisé de terre), adobe block masonry, cob (bauge), wattle and daub (torchis), compressed earth blocks (CEB), daub, extruded earth, poured earth (terre coulée), and several hybrid or regional variants. For each technique, the authors provide schematic construction drawings and performance data, allowing direct comparison. The production methods chapter addresses the manufacturing of compressed earth blocks in particular depth, reflecting CRATerre's substantial research investment in this area.
The authors cover manual, semi-mechanized, and fully mechanized press designs, block quality criteria, production rates, and quality control procedures. The economic analysis of CEB production—including labor costs, equipment amortization, and comparison with fired brick or concrete block—makes this section valuable for feasibility assessments in development contexts. Design guidelines occupy a substantial portion of the book's second half.
Houben and Guillaud address wall dimensions and structural calculations, foundation requirements (with particular attention to protecting earthen walls from rising damp), lintel and opening design, roof systems compatible with earthen walls, and floor construction. A dedicated chapter addresses disaster-resistant construction, covering seismic and flood risks and the design features—reinforced ring beams, horizontal and vertical ties, controlled wall heights—that substantially improve earthen buildings' survival under extreme loading. The chapter on earth wall finishes addresses an often-overlooked but practically critical subject: how to protect and maintain earthen surfaces.
The authors cover earth plasters, lime plasters, silicate and acrylic coatings, and various traditional surface treatments, evaluating each for durability, vapor permeability, ease of application, and compatibility with the base material. The book concludes with an extensive bibliography and a glossary of technical terms. Its 362 pages are densely illustrated with construction photographs, technical drawings, performance charts, and comparative data tables.
The combination of soil science, construction technology, structural guidance, and economic analysis in a single volume makes it a resource without equivalent in the earthen construction literature. Sources consulted: Practical Action Publishing book page (practicalactionpublishing.com); Amazon product descriptions (amazon.com); Semantic Scholar entry (semanticscholar.org); Sustainable Sources Books review (books.sustainablesources.com); Getty Conservation Institute teaching resource (getty.edu); WorldCat entry (worldcat.org); UNESCO World Heritage Centre in memoriam for Hugo Houben (whc.unesco.org); CRATerre website history (craterre.org); ICCROM obituary for Hugo Houben (iccrom.org).