Abstract: A natural wood surface treatment for an insulated door, in a preferred embodiment, a periphery of wood boards surrounding a grouping of raised panel inserts separated by center rails so that the assembled boards, inserts and center rails define a front panel for the door. The peripheral boards have grooves in the interior edges for receiving the center rails and raised panel inserts. To secure the front panel to the door, the peripheral boards have exterior grooves for slidably receiving inwardly directed flanges on the door side walls and bottom wall. A channel-shaped top cap secures the front panel along the top of the door.In another embodiment, openings are cut into the metal or nonwood front panel of a conventional insulated door for receiving assemblies of one or more raised panel inserts with natural wood moulding strips around them.