Indoors and outdoors are not the same problem
Indoors, wood works in relatively stable conditions. Outdoors — and even more so near the sea — you add direct sun, rain, constantly high humidity and salt air, which attacks both the wood and the hardware.
An exterior piece isn't an interior piece moved outside: the species changes, the finish changes, and the maintenance schedule changes.
Species we recommend for exterior use
For outdoor exposure we mainly work with cumaru, tzalam and parota, always with the right treatment. Cumaru is among the hardest we handle and is a common choice for entrance doors, decking and exposed beams; tzalam and parota work well when treated and offer different tones and formats.
Softer or lighter species we keep for interiors, where their behaviour is right.
Treatment is part of the design, not an add-on
Beyond the aesthetic finish, outdoors we apply protection against moisture and pests. The system is chosen by species, use and exposure, and approved on a physical sample before any material is bought.
Hardware is part of this conversation too: on the coast the selection criteria change, because hardware that's perfect in a bedroom can corrode quickly on an open terrace.
The maintenance you have to accept
No exterior wood is maintenance-free. Over time sun and humidity wear down the protective layer, and renewing it on schedule is far cheaper than recovering a damaged piece.
We say this before building, not after: if a client doesn't want that maintenance, we'd rather propose another solution or rethink the piece's location. See our terraces and doors work to gauge what each case involves.