The wood is rightly considered the ecological material par excellence. It is living matter that contains the energy stored throughout life by the plants from which it is derived, which absorb carbon dioxide and solar energy. Some things, however, you need to know because they serve to dispel clichés and to choose well. In order not to dwell on it, we refer you to these articles: knowing wood to use it well; how to choose wood.
Another thing to know is that not all wood is the same. Among the various types of wood there are in fact woods suitable and recommended for outdoors even without maintenance, others that can be used outdoors which however require regular maintenance and others that are suitable for indoors and not recommended for outdoors. Choosing the essence according to use allows you to avoid or minimize treatments.
THE maintenance-free outdoor woods they maintain their physical-mechanical properties without any treatment. Even the original color resists well over time, and those who appreciate the natural 'silvering' process caused by atmospheric agents can do without any treatment. Woods of this type are: acacia, chestnut, afrormosia, cypress, larch, oak, olive, sequoia, iroko and teak.
THE woods suitable for outdoors requiring maintenance regular they maintain their physical-mechanical properties, but the original color undergoes strong alterations and is not recoverable. To avoid metamorphosis under the action of atmospheric agents, it is necessary to treat the surface with greasing agents (vegetable and non-aggressive) two or three times every five years. Woods of this type are: fir, douglas, ash, pine, sipo, sitka spruce.
THE woods suitable for interiors and not recommended for exteriors they are essences without self-defense such as to allow the maintenance of physical-mechanical characteristics and color under the action of atmospheric agents. Indoors, however, they can also be used without any protective treatment. The most common woods of this type are: maple, beech, cherry, walnut, alder, linden, strobe pine, pine, pear.