To fully understand why spray cork is an excellent resource for sustainable construction, it is essential to know the material’s origin and understand its chemical-physical characteristics.

Cork is obtained from the pruning of the bark of the cork oak. After a twelve-month drying process, the bark is ground, and the cork granules are separated from the woody parts and impurities.

Cork is therefore an organic product that naturally possesses insulating, elastic, breathable, and sound-absorbing qualities: all positive characteristics for building envelopes. In particular, its breathability prevents, unlike synthetic insulating materials, moisture accumulation in the walls. Its very low water absorption prevents any liquid flow from outside to inside and vice versa. These properties, along with the rot-proof nature of cork even in constant humidity, ensure the extraordinary durability of the compound. SANACORK thus offers extensive guarantees in terms of longevity without requiring special maintenance activities.

Physical properties of spray cork SANACORK:

  • Thermal conductivity (EN 12667): 0.058 W/mK
  • Water vapor permeability (EN ISO 7783): Class I, Sd < 5m
  • Capillary absorption (EN 1062-3): < 0,1 kg/m2×h0,5

But what are the advantages of spray cork SANACORK in the field of thermal insulation?

  • Significant energy savings, as heat and cold dispersion – depending on the season – inside the living environment is limited, resulting in reduced consumption.
  • Reduction in CO2 emissions and volatile organic compounds, harmful to the environment.
  • Comfort and better living conditions.
  • Good fire resistance and sound insulation.
  • By limiting the phenomenon of condensation, thermal insulation prevents mold growth and other unpleasant effects related to humidity.

The occurrence of condensation moisture can be considered, simply put, a primarily thermal phenomenon, connected to the physical law that states that the amount of water contained in the air in vapor form decreases as the temperature decreases.

In practice, surface condensation occurs when relatively warm air cools rapidly upon contact with a colder surface (such as a window glass, a north-facing wall, a concrete beam, or a pillar flush with plaster, etc.).

In short, to counteract the humidity generated on thermal bridges, the essential characteristics that the insulating coating must possess are two:

  1. A low value of thermal conductivity.
  2. Good water vapor permeability.

Spray cork SANACORK presents both characteristics, making it, once again, an excellent bio-building solution.