Mythic - Mycelium Materials for Thermal Insulation in Construction

The Mythic project addressed the increasing demand for sustainable construction materials by developing innovative insulation products using mycelium bio-composites (MBCs). Centred on circularity and environmental sustainability, the project advanced research across four themes: growth optimization, material properties, prototyping and design, and feasibility and upscaling. In growth optimization, the project enhanced MBC production efficiency while minimizing energy use. Steam pasteurization emerged as a scalable, energy-efficient alternative to sterilization, and reclaimed cellulose as an inoculant improved growth speed and substrate colonization, aligning with industrial production needs. Material properties focused on determining thermal conductivity, fire resistance, water repellence, and moisture behaviour. Thermal and fire performance matched industry standards, while coatings improved durability in humid conditions. Compression and conductivity tests confirmed MBCs’ suitability for insulation applications. Prototyping demonstrated MBCs’ versatility through modular room dividers, insulation panels, and architectural components. User acceptance studies highlighted positive responses to MBCs’ sustainability and biophilic qualities, though challenges like loose fibres and scalability required further refinement. The economic valuation analyses showed potential for cost reductions through process optimization. While lab-scale production costs are higher than conventional materials, scalability and the use of green energy and waste feedstocks could make MBCs cost-competitive. True pricing analysis emphasized their long-term market viability. The Mythic project established MBCs as a viable, sustainable alternative to traditional insulation materials, addressing challenges in scalability, performance, and market acceptance, and paving the way for future research and broader industry adoption.