Patent ID: 8789338

Claim:
A method for insulating a structure, the method comprising: providing a frame that comprises a plurality of frame members coupled together; coupling a plurality of sheathing panels to the frame members such that each sheathing panel of the plurality of sheathing panels abuts an adjacent sheathing panel of the plurality of sheathing panels at an interface and such that the coupled sheathing panels form a wall having an interior surface that contacts the frame members and an exterior surface opposite the interior surface, wherein the interface comprises a gap or void of about ¼ inch; and applying a spray insulation material to the exterior surface of the wall such that the insulation material forms a substantially continuous insulation layer that extends continuously over and atop the exterior surface and such that the insulation material is sprayed directly atop and contacts the interface of adjacent sheathing panels of the plurality of panels to restrict passage of air between the adjacent panels to at or below 0.2 L/m 2 /s at a differential pressure across the wall of 75 Pa; wherein the insulation layer provides an R value of at least 5.