How to Hang Inset Doors Install butt hinges perfectly and establish consistent, slender margins. By Tim Johnson Nothing signals skillful craftsmanship like an inset door with elegant hinges and eye-pleasing margins. This challenging job leaves no room for error: Uneven surfaces and unsightly gaps will tell the tale if the hinges, door and frame don’t fit precisely. Like mastering handcut dovetails, successfully hanging inset doors on mortised butt hinges is …