Abstract: An adjustable panel locking mechanism is disposed in a slot of a structural member of the panel. A cam-strike or latch is disposed through the slot, over a lock plate, and both are covered by a cover plate. When the panel is assembled, and expanding foam is injected into a volume created by a plurality of structural members and exterior sheathing, the foam expands to the cover plate, which exerts a pressure or force on the cam-strike or latch disposed through the slot. The cam-strike or latch is then adjustable based on the friction between the lock plate and the cover plate with the base of the cam-strike or latch there between.