Insulation and Weather Resistant Barrier Systems

A first IWS panel used for construction purposes, comprising the following layers:

• an optional insulation facer layer having an outer surface and an inner surface;
• a first insulation layer having an outer surface and an inner surface;
• wherein, when the insulation facer layer is present, the inner surface of the insulation facer is planarly and contactably attached to the outer surface of the insulation layer;
• a first structurally stable panel having an outer surface and an inner surface, and at least one edge extending between its outer surface and the inner surface;
• wherein the inner surface of the first insulation layer is planarly and contactably attached to the outer surface of the first structurally stable panel;
• and
• a first WRB layer having an outer surface and an inner surface, wherein the inner surface of the WRB layer is secured to the outer surface of the first structurally stable panel through an adhesive layer, or through a fastener-gasketing layer, or through an adhesive layer and a fastener-gasketing layer;
• wherein the WRB layer exceeds the dimension of the first structurally stable panel from at least one of its edges to create an extension flap;
• and
• wherein the extension flap of the WRB layer further comprises a removably attached release-liner attached to the WRB layer's inner surface.