Hi all,
I am working on my first build and am almost done. Question for you: what is your opinion about the roof substrate. I had originally planned to use 3 mm birch ply as the sub roof (glued and screwed to sidewall edge and spars) with aluminum over. But now I am thinking about just installing the aluminum. Note: I have 30 inch high front and rear bulk head walls at the front and rear exterior that are 3/4 ply, roof spars that are spaced every 7 inches up the side and over the front and rear curve, and then spars spaced every 11 inches ( except at the fan where the two 2x2s are 14 apart). The aluminum is .040 and bendy but firm I think it is 5052. there is hard foam insulation between spars up to the roof line.
I'd like to save the weight and extra step of installing the ply sub roof, what do you think?
Many thanks in advance,
Mariann