Insulation and ventilation systems for building structures

An insulation and ventilation system for a building envelope, the system comprising:

• one or more interior building envelope layers;
• an insulation panel having an interior side abutting against at least one of the one or more interior building envelope layers and an exterior side having a plurality of transversely spaced and continuously vertically extending grooves interspaced between a plurality of transversely spaced and continuously vertically extending projections, the continual vertical extension of the grooves and the projections orthogonal to the transverse spacing of the grooves and the projections;
• and
• one or more exterior building envelope layers located exterior to the insulation panel to provide a plurality of longitudinally extending and transversely localized venting channels defined at least in part by an interior surface of the one or more exterior building envelope layers and the grooves of the exterior side of the insulation panel;
• wherein the insulation panel comprises a transversely and outwardly extending protrusion located at one of upper and lower, transversely extending, faces of the insulation panel and contiguously formed with a corresponding one of upper faces and lower faces of the transversely spaced and continuously vertically extending projections to thereby form a plurality of blocking surfaces having normal vectors parallel to the continual vertical extension of the grooves and the projections, the blocking surfaces at least partially blocking the channels at the transversely extending face;
• wherein the insulation panel is fabricated from a fluid-impermeable material;
• and
• wherein the insulation panel is mounted in a manner that does not permit fluid flow through the panel from an exterior side of the panel to an interior side of the panel.