Transportable modular system for covered isolation of assets

A human portable, modular double roof assembly comprising (i) (n+1) modular double joist assemblies arranged successively, at a depth distance D from one another, along and on top of substantially parallel walls, and said double joist assemblies being substantially perpendicular to one another, wherein said double joist assemblies are configured at both an upper joist assembly and a lower joist assembly to receive upper panel pieces and lower panel pieces (ii) upper roof panel pieces to completely fill an upper space between said (n+1) successive double joist assemblies, (iii) lower roof panel pieces to completely fill a lower space between said (n+1) successive double joist assemblies, wherein n=1 to 20 and wherein an enclosed cavity is therein defined, wherein the lower roof panel pieces have skin materials which are selected from the group consisting of spun para-aramid fiber, ballistic-grade E-glass, commercial E-glass, S2-glass, polypropylene thermoplastic sheet, polyurethane/polyurea-blended sheet, polyurethane films (with or without reinforcement), fiberglass, carbon fiber, metal mesh/grid fiber reinforced plastic (FRP) and combinations thereof.