Right now I am getting closer to needing to come up with the skin design for the roof. If I use aluminum and need something to go between the aluminum and marine plywood, how do I attach the aluminum to the plywood without using fasteners? It would be a shame to have a true one piece aluminum roof with zero holes, then mess it all up with leaky rivits.
You secure around the edges under the seam bead which is caulked or putty. The center is kept from flapping with the roof vents and anything else you secure on the roof. No need to use rivets or screws any place else.
Since you made the frame out of steel, you will need to predrill holes and then secure with the screw that also secure the seam trim.
Further, how hard is it going to be to obtain and manuever 8.5 feet by 22 feet of 0.050 aluminum...
My father and I did a 38' Park model trailer in one piece. Only issue was getting the roll up on the roof which we did with out farm tractor. After we got it rolled out, it was easy to slip here and there to get it in position.
After we were sure we had it in the right position, we temporarily secured a couple of roof vents (dry, no caulking) to hold the sheet in place. Then it was just a case of beating the edges of the sides and trimming as necessary.
Due to the curve in the front, you will need to decide how far to run the roof material. On the frat it is easy, but on edges, it will become a pain quickly trying to round the ends while keeping a good seal. That is why they use the corner bead for sealing the raidus front.
And remember, the siding goes on first, roof last.
