Patent ID: 8789329

Claim:
An exterior insulation and finishing system (EIFS) for application to a frame or sheathing of a building, comprising: an optional liquid applied vapor barrier layer applied to either the frame or the sheathing to reduce vapor permeance from inside of the building to the EIFS; a vapor impermeable insulation assembly placed on an exterior surface of the sheathing or vapor barrier layer by sticking and back sealing over the sheathing or liquid applied membranes to substantially prevent vapor diffusion through the insulation, wherein the impermeable insulation assembly comprises a plurality of vapor impermeable insulation boards and the joints between the boards are sealed with an expandable polyurethane spray foam and a separate polymer based material such that warm vapor from inside or outside of the building does not contact with zones with significant differences of temperatures, to prevent moisture to be created within the wall or insulation; a reinforcing layer embedded in a basecoat of cement and polymer, the reinforcing layer being applied to the exterior of the impermeable insulation assembly; and an exterior finish applied to the reinforcing layer.