Grow-In-Place Mushroom Insulation

Credit: Ecovative Design LLC

What makes this product green?

  • Reduces heating and cooling loads
  • Avoids hazardous ingredients
  • Low-emitting
  • Biobased and sustainably sourced


Ecovative offers Grow-In-Place Mushroom Insulation for pre-fabricated, controlled conditions. The foam, which consists of mycelium (mushroom “roots”) bonded to agricultural byproducts, takes about a month to grow in a factory setting, according to the company. Then it is allowed to dry out, producing a solidified, airtight, structural wall assembly. The insulation is Class A fire rated without any added flame retardants, has an R-vale of 3.6 per inch, and a compressive strength of 0.3–6.7 psi at 10% (ASTMAmerican Society for Testing and Materials. Not-for-profit international standards organization that provides a forum for the development and publication of voluntary technical standards for materials, products, systems, and services. Originally the American Society for Testing and Materials. D695). Growing the insulation allows it to be self-sealing and reduces thermal bridgingHeat flow that occurs across more conductive components in an otherwise well-insulated material, resulting in disproportionately significant heat loss. For example, steel studs in an insulated wall dramatically reduce the overall energy performance of the wall, because of thermal bridging through the steel. .

Additional Info


  • Cradle to Cradle Gold


Manufacturer Information

Ecovative Design LLC
60 Cohoes Ave.
Green Island, NY 12183
Phone: 518-273-3753

Listed in: Spray Foam Insulation