Abstract: Reinforced door skins, a door including one or more of the reinforced door skins, and methods of making the reinforced door skins and door are provided. The reinforced door skin as made by providing a reinforcement backing having a fibrous substrate layered with a solid-state thermoplastic hot melt adhesive, pressing the reinforcement backing and a preformed board having a door skin shape against one another at a temperature above a melt temperature of the thermoplastic hot melt adhesive and at sufficiently high pressure to conform the reinforcement backing to the door skin shape of the preformed board, and cooling the thermoplastic hot melt adhesive to form a reinforced door skin, the thermoplastic hot melt adhesive fusing the fibrous substrate to the preformed board of the reinforced door skin.