Bamboo is one of the hardest and dimensionally the most stable types of wood. It does not shrink, stretch, cleave, and expand like most other wood. The boards that are 140 mm wide do not come off, which is why it is classified as real teak. Its broken fiber structure is crushed with resin, pressed under 2300 kg of pressure and then heat-treated at 200 °C, to give a further 50% of increased resistance and hardness, which destroys the sugars hemicellulose that are foods for fungicide. This prevents decay and decomposition of the wood; however, unfortunately, that cannot be said for other types of wood that have their own natural resin and lose their binder – resin, which is important for wood persistence when they undergo thermal treatment. Such wood decays on the inside, which can be seen through time (contraction, expansion, cracking).