The term hygroscopic refers to a material’s ability to interact with moisture—specifically, its capacity to absorb and release water vapour. Hygroscopic materials are vapour-permeable, meaning they do not form barriers to moisture but instead allow it to pass through, stabilizing humidity levels within a space.

Many hygroscopic materials are natural fibres with a low environmental impact. These materials offer several significant benefits:

• Low Embodied Energy: Unlike petrochemical-based alternatives, hygroscopic materials typically have lower embodied energy, meaning their production and use require fewer resources and result in less carbon emission.
• Recyclability and Compostability: At the end of their life cycle, these materials are easily recyclable or compostable, contributing to a circular economy and reducing waste.
• Indoor Air Quality: Hygroscopic materials help regulate indoor air humidity, creating a healthier environment by reducing surface condensation and preventing the formation of harmful moulds caused by trapped moisture.

By choosing hygroscopic materials, we can create buildings that are more resilient to environmental factors while also supporting better health, comfort, and sustainability.