Have I goofed?

I confess I am building without a set of prints. I have made the bottom of the cabin a full 48X96 size with 1/2 ply outer skin. I think I maybe should have made it 47 wide to let the aluminum skin cover completely. Will using L channel 1 inch by 1/2 provide enough coverage to stay weather proof? Not to late to build a new base, cutting this one down by 1 inch is out of the question. Question and Doubts!!


