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A slab door is a standalone door without a frame or hardware. A prehung door is a complete set that includes the door, frame, hinges, and sometimes the doorknob and lockset.

In most cases, a prehung door is the better and easier option to install, especially for DIY projects or exterior applications, as they often come pre-weatherproofed. They require fewer tools and less experience to install properly. Although prehung doors are heavier and have a higher upfront cost, the investment is often worthwhile for a complete upgrade that includes a new frame.

A slab door may be a better choice if you are on a tight budget, have a custom-sized wall opening, or only need to replace the door while keeping the existing frame. While the initial cost is lower, you will need to purchase all the hardware separately and do more DIY work to hang it, which may not result in significant time or money savings.

A prehung door is a door that comes ready to install, already mounted in its frame with hinges and stop molding included. Because everything is factory-aligned, installation is quicker, more precise, and convenient, as you don't need to drill or align the hinges yourself. This makes it a smart option if your current frame is damaged, uneven, or if you're working on a new build. Installation involves fitting the entire unit into the rough opening, shimming and leveling it, and then securing it. If you are replacing an existing prehung door, the process is even simpler, often just requiring you to swap the old unit for the new one and secure it with a few screws. Prehung doors typically cost only slightly more (around $20) than a door slab alone, making them an efficient choice.

Most bedroom doors are 30, 32, or 36 inches wide and about 80 inches tall, depending on the size of the room, the height of the ceiling, and any special accommodations that may be necessary for the bedroom’s occupant. The size of your bedroom door may be larger than average if it leads into a very large bedroom or a home with unique wall or ceiling features.

You will need to cut or break a boomstick so it is wider than the door and long enough to anchor outside the door frame. Extend the broomstick horizontally under the doorknob, ensuring it's snug. Now using long screws and a drill, anchor the broomstick to the wall outside the door frame. Remember that you won't be able to open the door afterward. Do not proceed with this hack if your home has no alternative exit.