I would go with the cypress. Up here it's not available, the standard for adirondack chairs is cedar. It lasts forever, but it is not very strong. Most plans call for 1/2", I use 3/4" to compensate. I have a pair still going strong that I built when I was 17 ...um let's see - 30 years ago. They have gone from natural(weathered grey), to oiled, to stained, to painted, white then yellow, and now back to cedar - opaque cedar color stain.Originally Posted by Dennis Peacock
Steve