Insulation: The Cork That Doesn’t Go Into Wine Bottles
Cork has uses ranging from place mats to flooring and has been harvested sustainably since
. Because cork bark can be harvested every 20 years from long-lived cork oak trees, Europe has cork forests which support wildlife species found nowhere else.Insulation is increasingly important to reducing energy demand. After punching out corks for wine stoppers, the leftover cork can be ground, placed into molds, and injected with steam to form blocks of insulation. Cork binds to itself, so no additional binding agents are required. Most of the processing energy is obtained by firing a boiler using cork dust, so the embodied energy — the energy required to produce cork insulation —Cork, being tree bark, is largely carbon.
An energy-efficient house means fewer solar panels are needed to get to net-zero energy. I was fortunate to be able to build to the
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