Mechanically or adhesively attach new 1 1/2" expanded polystyrene (EPS) insulation board between the metal flutes on the existing metal decking; Mechanically or adhesively attach new 2" polyisocyanurate insulation board; Mechanically or adhesively attach new 1/2" fiberboard; Install new 1 1/2" SPF roof system over new 1/2" fiberboard in accordance with manufacturer's specifications