Raw material

Un alcornocal, fuente del corcho natural

The raw material of our product
  • Cork is a noble material.
  • Cork is a natural material.
  • Cork is ecological coating.
  • Cork is a solution for construction.
  • Cork is the main material for coverings
A renewable resource

Cork is the bark that covers the wood of the cork oak and protects it against the extreme conditions of the Mediterranean climate, such as drought, high summer temperatures and fires.

As the tree develops, the bark, made up of annual layers, increases in thickness in proportion to the growth of the trunk or branch from which it originates.

Cork comes from the bark of the cork oak. It is a renewable and constant resource, making it ideal in terms of the ever-increasing demand for the conservation of natural resources, since it is obtained by debarking the cork oak, without cutting any trees and that "harvest" is carried out every 9 to 12 years.

What makes cork so special?

The cork is formed by polyhedral gaps similar to the cells of a honeycomb. The cells of cork tissue are dead, air-filled units.

The walls of these cells, which are like tiny watertight compartments, are basically made up of suberin and cerin, substances that make it quite fireproof, very flexible and practically rot-proof.

The walls of these cells, which are like tiny watertight compartments, are basically made up of suberin and cerin, substances that make it quite fireproof, very flexible and practically rot-proof.

The existing pores in the cork are called lenticels, necessary for its respiration, since it is through these that the cork receives oxygen.

Regarding the chemical composition, it must be said that the first notable discovery in research on the nature or chemical composition of cork, identified the "suberin", fundamental substance, undoubtedly the most important of those that make up the cork tissue. Suberin is now known to be a mixture of fatty acids.

Cork properties
  1. Lightness: this is due to the fact that 88% of its volume is air, which translates into a low density, between 0.12 and 0.24 Kg/litre.
  2. Elasticity: elasticity is the ability to recover the initial volume after suffering a deformation, which justifies, among other things, its use in covering.
  3. High friction coefficient: the surface of the cork is upholstered by micro-suction cups that allow it great adherence and make it difficult to slide.
  4. High impermeability: the diffusion of liquids and gases through the cork is very difficult, it is carried out quickly through the lenticelar pores and extremely slowly through the plasmodesmata.
  5. Aeroelasticity and shock absorber: aeroelasticity means that the area affected by the deformation is not only the one in which it is in contact, without extending the effect to neighboring areas, which allows good shock absorption.
  6. Low water content: the equilibrium humidity of the cork with the environment, once the rasp has been removed, does not exceed 9% of its weight, normally being 6%. This low humidity makes the proliferation of microorganisms impossible, which gives it unlimited durability.
  7. Thermal insulation: the natural function of cork is to protect the living parts of the tree that generates it. Its alveolar structure (preventing air from circulating), the low water content and the lack of conductivity of its compounds allow it to fulfill its insulating function effectively. It has a resistance to the passage of heat thirty times higher than that of concrete.