Unless its going out in the rain you dont need marine ply. I used 17mm for walls to 20 degrees overhung and 19mm for steeper, but in retrospect I think 17mm all round would be fine.
After 7 years of procrastination I finally built a 10 panel mega woodie last year, starting off with no carpentry experience (or tools) and in a fit of bloody mindedness did it all solo which required some interesting pulley systems, near loss of body parts, and not quite OH&S manouvers to get the roof panels in place. It was great fun, and its still standing. Go for it. I should just use it more.... |