I see a lot of roofing companies claiming that hand nailing is better than a nail gun for roofing. I watched a video on htis but the guy doing the video was comparing a shingle he just hammered down with nails an inch apart to old shingles that were being torn off that had been done with a nail gun. The old shingles were brittle and the nails spaced the normal distance apart.
I see the contractors on TOH use nail guns and the show always tries to use best practices. Is hand nailing shingles really better?