Product · Materials Science
Product · InnDex 8 · Claimed, not yet evidenced · 1 refuted · High specification risk
Mycelium-colonized agro-waste panels with thermal properties matching expanded polystyrene.
Ganoderma lucidum mycelium is grown on agricultural residues (arboloco pith, kikuyu grass), heat-killed, and pressed into rigid panels. It targets thermal insulation demand in building envelopes with low embodied carbon and waste valorization. The material achieves 0.047 W/m·K thermal conductivity but exhibits severe dimensional instability and moisture vulnerability in unmodified form.
Ganoderma lucidum mycelium colonises arboloco pith and kikuyu grass, then is heat-killed and pressed into boards achieving 0.047 W/m·K thermal conductivity — matching expanded polystyrene performance with bio-based, waste-valorising inputs and a compostable end-of-life pathway. The thermal performance number is the strongest card in the record. What the research also reports, and what makes this product unsuitable for building specification in its current form, are the equally measured critical deficiencies: 53.6% volumetric shrinkage on drying, 556% water absorption, and 0.17 MPa compressive strength, which is far below any building code minimum. The record carries a refuted flag, adding caution beyond the data gaps. Severe water absorption is not a surface-coating problem — it affects the whole insulation assembly and eliminates use in any wall or roof construction where moisture can reach the board without comprehensive waterproof encapsulation. Shrinkage at that magnitude makes dimensional stability in an installed panel assembly unmanageable. No deployment exists, no durability data beyond laboratory characterisation, and no regulatory pathway for this class of material has been established. The mycelium insulation category has more developed commercial entries — Ecovative's work, for instance — that have addressed some of these fundamentals; this specific variant remains early-stage research with known structural deficiencies that would need resolving before any building application.
Source is peer-reviewed research (PMC12194127), not commercial deployment. The paper is transparent about barriers: authors explicitly flag shrinkage and water absorption as obstacles to construction use without further treatment. No evidence that these barriers have been solved post-publication. The brief's 'load-bearing' claim is not supported by this paper (compressive strength 0.17 MPa; structural minimum ~1–5 MPa for non-load-bearing panels, 10+ MPa for bearing walls) or by commercial deployment of any mycelium composite in structural roles. Thermal conductivity claim is accurate but insufficient: insulation must also survive moisture, dimensional change, and regulatory testing. Ecovative (disbanded 2023) and Mogu commercialized only packaging and acoustic products, never structural or moisture-exposed components.
#mycelium_composite #bio_based_insulation #agro_waste_reuse #low_embodied_carbon #thermal_insulation