As far as the privacy panels go, I am going with cedar, which I haven't worked with all that much, at least not exterior wise. How much does it move with the changing weather? I'm assuming not near as bad as PT lumber?
I'm asking because I don't want the louvers to move and twist after I get them put together. Would 4' lengths be too long or do you think that length would be fine to avoid distortion? I understand some movement, but my PT shadowbox fence has some nasty looking pickets, and they're nailed in 3 places.