Reed Hollow reed stalks are bundled into mats that act like tiny insulating tubes. Perfect for natural wall or roof insulation with great climate comfort. Supply chain in Ireland: Intermediate Characteristics Advantages Excellent acoustic insulation Excellent thermal insulation Vapour-permeable and moisture-regulating Biodegradable Disadvantages Sensitive to moisture if unprotected Bulky to transport and store Require skilled installation Limited availability Possible Building Elements Internal Wall Insulation Facade External Wall Insulation Facade