a roof deck support structure having a substantially vertical edge intersecting an upper surface at a corner;

a roof deck having a corrugated sheet supported on said upper surface of said support structure, at least one sheet of insulation above said corrugated sheet, a first sheet of rigid material, a roof covering above said first sheet of rigid material, and at least one spacer for positioning said first rigid sheet above said at least one sheet of insulation to provide an air space therebetween for venting said roof deck; and

a vent assembly comprising a front member having an outer surface, an inner surface, an upper end, and a lower end; a back member having a forward surface, a rear surface, an upper end, and a lower end; at least one connecting member connecting said front member inner surface to said back member forward surface in spaced apart relationship to form a passage for air flow therebetween wherein said passage communicates with said air space of said roof deck; a mount member having a proximal end secured to said back member rear surface and a distal end secured to said support structure such that said back member extends generally parallel to said substantially vertical edge of said support structure; and a screen attached to said lower ends of said front member and said back member.