Abstract: The present invention provides an apparatus and method for fabricating structural building panels. The apparatus may be used for fabricating panels directly on the foundation for a building. The apparatus may include a support frame, a flattening frame, a press frame, drive members such as pneumatic cylinders supported by the press frame, and posts attached to the support frame and used for aligning and coupling the apparatus and panel components. In order to fabricate a structural panel using the inventive apparatus, drywall sheets having bores sized for receiving the posts therethrough are prepared and drywall ribs or spacers are cut from drywall sheets. The support frame may be located on the foundation where the structural panel is to be positioned and a first sheet and a second sheet placed onto the posts, the sheets having adhesive and drywall spacers positioned perpendicularly therebetween.