(pronounced PREE-huhng dohr)
A pre-hung door is really a one-stop shop. Instead of having to buy all of the components separately, one can purchase a complete door unit comprised of a door(s), hinges, jambs, trim, and, if applicable, a threshold, T-Astragal, and a sidelight(s). It sounds like it would be a breeze to install one, huh? Not so fast. If you search on YouTube, you’ll find several videos instructing you step-by-step on how to hang a pre-hung door in a rough opening with accuracy.
See also: astragal, rough opening