Cypress will rot like any wood. There is also a difference between old growth cypress and grow back new cypress. The tight grain old growth cypress is more weather resistant, grow back cypress is no more weather resistant that a 2x4 you buy a lowes. I see people selling these cypress gliders, rocking chairs ect made of new cypress all the time and they may LOOK nice but left unfinished , crap let finished they are not suitable to be left outside. Old growth cypress has very tight grain and looks awesome but is now a reclaimed wood , meaning there are no more old growth cypress trees that are harvested for lumber so you have to tear down a building to get it
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