You should be staggering the joints. Also not sure if you realized it or not but the insulation has "This side down" printed on it and you put it right side up. There is a reason for the wording.
They also have instructions for asphalt shingles where to drive the nails on the package specifically, and it appears as though many roofers don’t read that.
yea definitely need to stagger the insulation, and their is usually a heavy roller someone should be rolling the ISO down with. although the glue cans do work too, but it's alot more moves.
I was wondering the same thing. With a little freeze frame of the video and a Google search, found this - OlyBond500 Insulation Adhesive is a fast-acting, two-component, low-rise polyurethane foam adhesive designed to secure insulation to roof decks
