Abstract: An insulated, water impermeable roofing system and a method for installing said system for insulating the interior of a building from ambient thermal cycling and for insuring water impermeable integrity of a roof portion of the building.The roof system includes an array of factory assembled, laminar roofing panels self bonded to a roof deck. Each panel includes a water and vapor impermeable membrane and an insulation course coextensively overlying said membrane. The laminar roofing panels are mutually juxtaposed but laterally spaced from one another to provide a peripheral expansion zone which is filled with a water and vapor impermeable compound. The compound is plastic and self-adherent under normal ambient temperatures and therefore operably bonds to the roof deck between adjacent laminar roofing panels as well as to the water and vapor impermeable membrane. The expansion zone compound in combination with the panel membrane forms a monolithic water and vapor impermeable barrier across the entire roof deck.

Abstract: An insulated, water impermeable roofing system includes an array of factory assembled, laminar roofing panels self bonded to a roof deck. Each panel includes a water and vapor impermeable membrane and an insulation course coextensively overlying said membrane. The laminar roofing panels are mutually juxtaposed but laterally spaced from one another to provide a peripheral expansion zone which is filled with a water and vapor impermeable compound. The compound is plastic and self-adherent under normal ambient temperatures and therefore operably bonds to the roof deck between adjacent laminar roofing panels as well as to the water and vapor impermeable membrane. The expansion zone compound in combination with the panel membrane forms a monolithic water and vapor impermeable barrier across the entire roof deck. Concomitantly the compound forms a plastic expansion joint about the peripheral edges of each of said laminar roofing panels.