Re: replacing plywood roof

How are the beams? In excellent shape I hope. Personally I find modern torx head construction screws hard to beat. I would glue it with construction glue too. But ring shank glue coated nails (nail gun) are very good as well and much faster.

Personally I need to mark the beam locations on the plywood with chalk lines to keep the fasteners in the beam.

I'd use foam sheets as insulation maybe with reflectrix.