Biological building is a building philosophy focusing on health, environment and ecology. It uses natural, non-toxic materials with emphasis on indoor climate and the interaction between a building and its natural surroundings. The approach considers not just the environmental impact of construction, but also the direct effect of building materials and design on the health and well-being of occupants.
Principles of biological building
Biological building is guided by a holistic view of construction that goes beyond structural performance and energy efficiency. Its core principles include:
- Non-toxic materials — Avoiding synthetic chemicals, formaldehyde-based adhesives, PVC, and other materials that release volatile organic compounds (VOCs) into the indoor air. Paints, finishes and adhesives are chosen for their low emissions.
- Natural materials — Preference for materials sourced from nature with minimal processing: clay plaster, lime mortar, untreated timber, natural stone, wool insulation and cork. These materials are often breathable, meaning they can absorb and release moisture, helping to regulate indoor humidity.
- Healthy indoor climate — Buildings are designed to maintain comfortable temperature, humidity and air quality. Natural ventilation, daylight and the moisture-buffering capacity of natural materials all contribute to a healthier living environment.
- Harmony with nature — Site orientation, landscaping and building design work with the natural environment rather than against it. This includes using passive solar design, rainwater collection, green roofs and integration with local ecosystems.
- Low environmental impact — Materials are selected for their low embodied energy, recyclability and minimal environmental footprint during extraction, production and disposal.
Biological building vs. bio-based construction
While the terms are related, they are not identical. Bio-based construction focuses specifically on using renewable biological materials in the building process. Biological building is a broader philosophy that encompasses material choice but also extends to design principles, indoor air quality, occupant health and ecological integration. A bio-based building is not necessarily a biological building if it does not address the full range of health and environmental considerations.
In practice
Biological building is applied in both new construction and renovation. Common applications include clay-plastered walls, lime-based renders, timber-frame structures with natural insulation, and carefully designed ventilation strategies that prioritise fresh air without energy waste.
Related terms
- Bio-based construction
- Sustainable building
- Indoor climate
- Ecological building
- Natural ventilation
Learn more about building terms in our knowledge base at fredsdiyplans.com.