Hello,
Thanx for the comments, I traced a pattern out on 3/4 ply for the roof ribs, taperd the ends to match the 2x4 side rails.The 1/4 luan was then put on top with 1-1/4 screws and PL 400 Had some slight crackling going on but I don't think it will be a problem.Going to put the rubber on it tonight, and let it cure till sat when I believe I'll put it up onto frame. I thought it would be neat to have a vaulted pine ceiling, so far so good thanx for looking! Dale