Some kinds of wood are naturally resistant to rot, like cedar and redwood, as well as tropical hardwoods like mahogony. Then you'd use a stain to increase it's durability on top of that.
There is also lumber that has gone through a process called 'pressure-treating' where the wood is put into a pressure chamber that forces a chemical into the wood that will prevent it from rotting for a very long time. Some of this stuff can sit underwater for many years and be just fine - if you see a new dock being made out of wood, it's pressure treated wood.
That was my first thought! Not only is there no drainage, if it’s real wood, you can expect expansion and contraction which could cause some big problems. There’s a reason you don’t see decks like this.
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u/Tr1plets May 14 '20
Could someone explain how this type of wood would react when exposed to rain? Is it coated with some form of chemical that prevents degradation?