A material formulated from natural cork particles agglomerated with resins, it is applied by projection on various substrates. It is a material that adapts to works with demanding energy efficiency criteria, both refurbishments and new constructions.
Its main virtue lies in the cellular structure of cork, which gives it a remarkable insulating capacity. Although it does not match the thermal performance of materials such as mineral wool or polystyrene, its versatility makes it an ideal complement for improving the building enclosure. Acoustically, it excels at attenuating reverberation in interior spaces, although more complex sound transmission problems often require more specialised soundproofing systems.
Cork’s natural resistance to moisture and micro-organisms makes it particularly suitable for exteriors or damp areas, whilst its flexibility prevents fissures common in rigid coverings. However, its longevity is critically dependent on professional application to ensure uniform thicknesses and good adhesion to the substrate.
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From an ecological point of view, its production is intrinsically sustainable: the extraction of the cork oak bark does not harm the tree, which regenerates in a decade-long cycle. However, the final environmental footprint of the product is conditioned by the chemical additives used in its industrial formulation.
Its application has been extended to multiple uses: from the coating of façades that seek to improve thermal insulation without sacrificing aesthetics, to the protection of roofs and metal structures against corrosion. In interiors, it provides decorative warmth and acoustic cleanliness, while in basements and wet areas it acts as a barrier against leaks.
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Although its application requires skilled labour and regular maintenance in extreme conditions, sprayed cork represents a unique balance between technical performance and environmental responsibility. Its growing adoption reflects a reinterpretation of traditional materials using modern techniques, and the trend towards responsible and sustainable construction.
By Eduardo Hernández GarcÃa, Senior Structural Modeller in Amusement Logic’s Architectural Dept.
Header image: THERMOCORK
