Thermacork Boardstock Insulation

Credit: Amorim Isolamentos, S.A.

What makes this product green?

  • Reduces heating and cooling loads
  • Certified wood
  • Avoids hazardous ingredients
  • Durable or low-maintenance
  • Biobased and sustainably sourced
  • Information transparency


Thermacork is a 100% natural, rigid-insulation material produced from natural cork. The cork forests are FSCNonprofit organization that promotes forestry practices that are sustainable from environmental and social standpoints; FSC certification on a wood product is an indicator that the wood came from a well-managed forest.-certified, and the Amorim facilities are FSCForest Stewardship Council. An independent, nonprofit organization that promotes responsible forest management through the use of a third-party certification process. FSC certification includes a chain-of-custody requirement that tracks sustainability of wood products from growth to end use. chain of custody certified. To produce rigid boardstock insulation, cork granules are steam-heated in an autoclave, which expands the cork and activates a natural binderGlue used in manufactured wood products, such as medium-density fiberboard (MDF), particleboard, and engineered lumber. Some binders are made with formaldehyde. See urea-formaldehyde binder and methyl diisocyanate (MDI) binder. , suberin, that is in the cork; additional binders or other chemicals are not used in production. Large billets are then cut into slabs as insulation. The material insulates to R-3.6 per inch, offers excellent acoustic control, is highly durable, has high vapor permeability, and meets fire-safety requirements (Euro Class E, based on EN 13501) without flame retardants. It is labeled Red List Free for use in Living Building Challenge projects.

Additional Info


  • Forest Stewardship Council (FSC)


Manufacturer Information

Amorim Isolamentos, S.A.
Rua da Corticeira 66 4535-173
Mozelos VFR,
Phone: +351 22.7419100

Listed in: Board Insulation