Most sustainable woods are eco-certified species from environmentally-friendly forestry operations (PEFC). These weather-resistant species include larch, western red cedar and sapwood-free Douglas fir. These species are easy to maintain, allowing the wood to develop naturally. Western red cedar, which is PEFC-certified, has very few knots and is particularly well suited to contemporary architecture. Larch, a species that lasts up to 50 years, comes from forests in the Alps and is PEFC certified. It has a more rustic finish for authentic architecture. French Douglas fir, PEFC and Bois de France certified, is characterised by its long-lasting durability.
Authentic and natural, wood is a living material. Durable wood species have natural properties that make them unique and distinctive: strength, shape, colour tones, robustness, grain - all characteristics that encourage a degree of architectural freedom. Humidity, heat and climatic conditions modify the characteristics of these natural woods, which tend to become greyer as they age. Those who are absolutely committed to respecting the environment will prefer unfinished wood. For those who want to preserve the original colour, there are various types of wood cladding with a finish, which help to preserve the design and aesthetics of the project.