Cordwood | EcoBuildz

Cordwood wall made of log ends protrude from the mortar by a small amount and used as a bu

Cordwood construction is a building technique that involves stacking short pieces of wood, typically firewood-sized logs, to create walls in a structure. These walls are often filled with an insulating material such as mortar or cob. Cordwood construction is known for its rustic and environmentally friendly characteristics and has been used for centuries in various parts of the world. Here's an overview of cordwood construction:

Materials:

The primary material used in cordwood construction is cordwood, which consists of short logs or wood pieces, often 12 to 24 inches long. Other essential materials include mortar or cob for filling the gaps between the logs and providing stability.

Construction Process:

Log Stacking: The cordwood logs are stacked horizontally or vertically to form the walls of the building. The orientation of the logs can vary depending on the desired design and structural requirements.
Mortar or Cob: The gaps between the logs are filled with mortar (a mixture of sand, cement, and water) or cob (a combination of clay, sand, straw, and water). This mortar or cob provides stability to the walls and acts as insulation.

Design Flexibility:

Cordwood construction allows for various design possibilities. Builders can incorporate different log colours, patterns, and orientations to create aesthetically pleasing and unique structures.

Energy Efficiency:

One of the significant advantages of cordwood construction is its energy efficiency. The thick walls with insulating mortar or cob provide excellent thermal mass, helping to regulate indoor temperatures and reduce heating and cooling costs.

Sustainability:

Cordwood construction is considered eco-friendly because it typically uses locally sourced, renewable materials (wood) and minimizes the need for more energy-intensive building materials like concrete or steel.

Modern Adaptations:

While cordwood construction has traditional roots, modern builders have adapted the technique to incorporate contemporary building standards and materials. For example, some builders use insulated cores within the walls to enhance energy efficiency.

Resurgence:

Cordwood construction has experienced a resurgence in popularity, particularly among those interested in sustainable and natural building methods. It is often used for homes, cabins, workshops, and other small structures.

Challenges:

Cordwood construction may require specialized skills and knowledge, especially when selecting appropriate wood, mixing mortar or cob, and ensuring structural integrity. It may also require careful planning to prevent moisture infiltration.

Cordwood construction is a niche building method that appeals to individuals seeking a unique and environmentally friendly way to create structures. Its blend of historical tradition and modern sustainability principles makes it a fascinating and attractive option for those interested in natural building techniques.

Cordwood construction, also known as cordwood masonry or stackwall construction, is a building technique that involves using short logs or pieces of firewood (cordwood) to build walls. This method has been used for centuries in various parts of the world and has a rich history. Here's an overview of the history of cordwood construction:

Early Origins:

Cordwood construction has ancient roots and is believed to have been used by various cultures throughout history. Some of the earliest known examples date back to the Neolithic period when people used stacked logs or stones and filled the gaps with mud or clay to create simple, sturdy structures.

European Influence:

In Europe, particularly in Northern and Eastern Europe, cordwood construction techniques were used to build houses, barns, and other structures. The method involved stacking cordwood horizontally or vertically and using a mortar or clay mixture to fill the gaps between the logs.

North American Settlement:

Cordwood construction gained popularity in North America during the 19th century as European settlers brought their building traditions with them. They used the available wood to construct homes, cabins, and outbuildings.

Immigrant Influence:

Certain immigrant groups, such as the Finns and the Ukrainians, were known for using cordwood construction in North America. These groups brought their knowledge of cordwood building techniques and incorporated them into their new homes.

Rise of Mortar-Encased Cordwood:

In the late 19th and early 20th centuries, a variation of cordwood construction emerged that involved encasing the cordwood walls in mortar. This technique improved the structural integrity of the walls and enhanced insulation properties.

Rediscovery and Resurgence:

Cordwood construction largely fell out of favour with the advent of more conventional building materials and techniques in the mid-20th century. However, it experienced a resurgence in the late 20th century and early 21st century as people sought sustainable and energy-efficient building methods.

Modern Applications:

Cordwood construction is often used for eco-friendly and energy-efficient homes and structures. The method is prized for its thermal mass properties, which help regulate indoor temperatures and use renewable and locally sourced materials.

Innovations:

Modern cordwood construction has seen innovations, including insulated cores, different mortar mixes, and advanced construction techniques. These innovations have made cordwood building more efficient and environmentally friendly.

Cordwood construction continues to be a niche but growing field in the construction industry. It offers a unique and aesthetically pleasing way to build sustainable and energy-efficient structures while paying homage to ancient building traditions.

Cordwood Building A Comprehensive Guide to the State of the Art Fully revised Second Edit

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"Cordwood Building: A Comprehensive Guide to the State of the Art" by Rob Roy offers an in-depth exploration of the cordwood construction method, providing readers with a thorough understanding of this unique and sustainable building technique. Published in its fully revised second edition in 2016, this book serves as a comprehensive resource for individuals interested in building their own cordwood structures. The book begins by introducing readers to the history and origins of cordwood construction, tracing its roots back to ancient times. It then delves into the modern practice of cordwood building, covering essential topics such as material selection, building techniques, and design considerations. Rob Roy provides detailed instructions and step-by-step guidance for every stage of the building process, from preparing materials and laying the foundation to constructing walls and finishing touches. He explores various aspects of cordwood building, including mortar mixes, insulation methods, and roof options, offering insights and tips based on his extensive experience in the field. In addition to practical advice, the book features inspiring case studies and examples of cordwood buildings from around the world, showcasing the versatility and beauty of this construction method. Readers will also find information on troubleshooting common issues and maintaining cordwood structures for long-term durability. Overall, "Cordwood Building: A Comprehensive Guide to the State of the Art" equips readers with the knowledge and skills needed to embark on their own cordwood building projects. Whether they are novices or experienced builders, this book serves as an invaluable resource for anyone interested in sustainable, natural building methods.

Cordwood Construction Best Practices A log home building method using renewable resources

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"Cordwood Construction: Best Practices" by Richard Flatau provides a comprehensive guide to cordwood building, a unique construction method that utilizes renewable resources and time-honored techniques. Published in 2012, this book serves as a valuable resource for individuals interested in sustainable and natural building practices. The book begins by introducing readers to the concept of cordwood construction, explaining its history, benefits, and ecological advantages. Flatau then delves into the best practices for cordwood building, offering detailed instructions and step-by-step guidance for every stage of the construction process. Readers will learn about selecting and preparing materials, including the types of wood suitable for cordwood walls and appropriate mortar mixes. Flatau covers essential techniques for laying cordwood walls, ensuring structural integrity and energy efficiency while maintaining aesthetic appeal. In addition to practical advice, the book features insights into design considerations, such as incorporating windows, doors, and other architectural features into cordwood structures. Flatau also addresses common challenges and provides solutions for troubleshooting issues that may arise during the building process. Throughout the book, Flatau emphasizes the importance of sustainability and environmental stewardship, highlighting the renewable nature of cordwood as a building material. He also showcases inspiring examples of cordwood homes and structures, demonstrating the versatility and beauty of this construction method. Overall, "Cordwood Construction: Best Practices" equips readers with the knowledge and expertise needed to successfully undertake their own cordwood building projects. With its comprehensive coverage and practical guidance, this book serves as an essential resource for anyone interested in exploring alternative, eco-friendly building techniques.

Essential Tools and Equipment for Building Cordwood Cottages: Your Guide to Successful Construction