Method and panel with increased strength. The panel includes a base layer configured to have plural first protuberances; a core layer located on the base layer and configured to have plural second protuberances and to accommodate the plural first protuberances of the base layer; and a top layer in direct contact with the plural first protuberances and the plural second protuberances.

A laminated board is secured to the inner wall of a cavity wall construction to establish a defined spacing between the inner and outer walls and prevent excess mortar from bridging to the inner wall. The laminated board has a series of spaced sockets into which fasteners may project into the face of the inner wall or framing thereof to secure the outer wall. The board is installed prior to the construction of the outer wall and establishes a minimum spacing or gap between the walls based upon the thickness of the board. The outer wall is constructed immediately adjacent to the outer face of the laminated board. The board is impervious and eliminates bridging by the mortar, eliminates transfer of bulk water from the exterior finish to the inner wall and provides an air conduit to exhaust even the minimal amounts of vapor that will occur in the cavity.

A panel includes a base layer configured to have plural first protuberances; a core layer disposed on the base layer and configured to have plural second protuberances, wherein one or more of the plural second protuberances have first slots in a top portion; inserts provided on the base layer and inside the one or more of the plural second protuberances of the core layer; and a top layer in direct contact with the plural first protuberances and the plural second protuberances and configured to have second slots that correspond to the first slots. The inserts are exposed to ambient through the first slots and the second slots.

A laminated board is secured to the inner wall of a cavity wall construction to establish a defined spacing between the inner and outer walls and prevent excess mortar from bridging to the inner wall. The laminated board has a series of spaced sockets into which fasteners may project into the face of the inner wall or framing thereof to secure the outer wall. The board is installed prior to the construction of the outer wall and establishes a minimum spacing or gap between the walls based upon the thickness of the board. The outer wall is constructed immediately adjacent to the outer face of the laminated board. The board is impervious and eliminates bridging by the mortar, eliminates transfer of bulk water from the exterior finish to the inner wall and provides an air conduit to exhaust even the minimal amounts of vapor that will occur in the cavity.