· a prehung door arrives as a complete assembly, already mounted within a new frame, whereas a slab door is simply the panel that you can install in a current frame. Compare costs, installation time, and skill needs. This guide compares the two based on essential factors in the decision-making process. Prehung interior doors and slab doors. Slab doors and their pros and cons. · pre - hung doors and slab doors are the two choices you have when buying doors. Learn which fits your project best. Both have their advantages and disadvantages, and the choice largely depends on your specific needs, budget, and design preferences. · compare prehung entrance doors and interior doors to slab entry doors and interior doors to find the best door for your project. · when it comes to choosing interior doors for your home or project, the decision often boils down to two popular options: · slab and pre - hung doors are both excellent interior door choices. · discover the key differences between pre - hung and slab doors and how to decide which is right for your new build or remodel. · prehung door vs slab door : Learn about pre - hung doors vs.