I am building the roof on my camper right now. so far I have 1/8th inch screwed down and 3/4 inch strip perimeter around the top edges and spanning the joint of the ply sheets. I used titebond III to glue the strips to the joints of the plywood spanning the joint.
I have screws and titebond iii holding the 3/4 inch strip.
once I put the foamboard and the top skin of 1/8th inch the same way. will that be a good enough joint with plenty of titebond iii and screws?
or is it imperative to fiberglass the seams.