Prefabricated watertight structural system

Claim 1

A prefabricated roofing system comprising: a group of panels contiguously arrayed in side-by-side and end-to-end abutting, junction-defining relationship on a supporting substructure, each panel including a first sheet metal member; a second sheet metal member spaced from the first sheet metal member and disposed substantially parallel thereto; a body of foam insulation substantially filling the space between and bonded to the first and second sheet metal members; a thin, flexible, elastomer membrane extending over and being substantially continuously bonded to the first sheet metal members for forming a fluid-tight covering over the array of panels; an extruded elastomer fastener connecting each edge of each of said membranes, said fasteners having end portions coverging towards each other defining an interstitial region at the junction of a plurality of said membranes; and, apparatus forming a sealed connection between said converging end portions, said apparatus including a first plate disposed below said fasteners, a second plate disposed above said fasteners, said first and second plates each having an interior side surface which overlaps said converging end portions, a viscous, adhesive sealing material the constituent particles of which flow in response to pressure applied to the interior side surface of at least one of said plates, and means clamping said plates together to cause the sealing material to flow between the plates into the interstitial region.