I don’t do a lot of crown moulding, but when I do, there is inevitably a long piece that takes 2 people. Sometimes my customer helps me, and other times I muscle it up there. I had several 14 footers to put up recently so I made some helpers out of 2x4s. They worked quite well!
I also put some crown moulding over a shower…again…this time I pre-primed the pieces on the back, including the cuts. Hoping they stay nice and dry and don’t get wet!