Two doors look alike in the catalogue, but one price includes a frame and the other does not. Comparing them as if they were the same replacement can make a renovation budget misleading before installation begins.
Masonite’s interior-door measuring guide distinguishes a slab, which is the door panel, from a prehung door supplied with the slab already hinged into its frame. Exact inclusions still depend on the product, so check the listing rather than assuming every handle or trim piece is supplied.
Decide what is staying
If the existing frame is sound and suitable, a slab replacement may be considered. If the frame is being replaced too, the job involves the whole opening. Neither choice removes the need for accurate measurement and appropriate installation.
Ask the installer to assess the frame, clearances, hinge arrangement and intended operation before ordering. An existing door that rubs may reflect more than the panel itself. Copying its nominal size without checking the opening can preserve the problem.
Put the measurements beside the product
Record the required width, height and thickness, and clarify how the supplier describes handing and swing. For a framed unit, confirm the relevant opening and jamb dimensions. Use the manufacturer’s measuring instructions; a panel measurement and a rough-opening measurement are not interchangeable.
A practical comparison sheet can list the door panel, frame, hinges, latch preparation, handle set, trim, finishing and installation. Mark each item as included, retained or separately required. This makes a lower headline price easier to evaluate fairly.
Consider nearby furniture, switches and floor finishes when checking the swing. For a door with fire, smoke, acoustic or other performance requirements, have the complete specified assembly assessed rather than assuming an ordinary panel substitution preserves its rating.
The better purchase is the one that matches the actual work. Once you know whether you are replacing a panel or a framed unit, quotes become clearer and the installer can address fit before the new door is waiting in the hallway.