A dimensionally adjustable thermally broken door panel having a door thickness, a first and second thermally conductive metal door skins and a plurality of non-thermally conductive trimable edges. Each trimable edge having an edge flange, a door edge and an edge flange thickness. An insert flange can be integrally mounted each of the edge flanges projecting in a direction opposite the door edge, wherein each edge flange can support both the first and second thermally conductive metal door skins in a flush engagement. The dimensionally adjustable thermally broken door panel can prevent thermal transfer between the first and second metal door skins, while enabling dimensional adjustment of the plurality of trimable edges on location to ensure a perfect fit into an existing door frame.