Hey everyone, years ago in college I was watching a show on new construction materials and there was a guy erecting insulating sheathing. I seem to remember it being a solid bluish, but it was NOT foam. It was a kind of rigid fiberglass drywall. I remember he had a tool that you passed over a fresh cut to give it that factory tapered edge to make every seam perfect. You erected it as normal, tape and plaster with light sanding and a coat of paint to finish.
Does anyone know what I am talking about and who makes it?