A slab door is the door panel without a complete frame. Depending on how it is ordered, it may be blank or prepared for hinges, a latch, a lockset, or sliding-door hardware.

A prehung door is already attached to a new jamb with hinges. The complete unit is installed into the framed wall opening.

Usually not. Many prehung doors are bored for a standard lockset, but the knob, lever, latch, strike, and other decorative hardware are commonly purchased separately.

Not necessarily. Some slabs are sold completely blank, while others can be ordered with hinge mortises or other preparation. Confirm what is included before ordering.

The panel usually costs less because a frame is not included. However, fitting, trimming, boring, mortising, finishing, and installing the slab can increase labor costs.

A prehung unit reduces the need to match old hinge locations, but installing the frame requires careful leveling, shimming, and fastening. A slab avoids frame removal but requires precise fitting to the existing jamb.

A beginner can install one, but the work requires accurate measuring and careful cutting. Small errors in trimming, hinge placement, or lock preparation can cause uneven gaps or poor latching.

It is possible, but the installer must keep the hinge jamb plumb, the head jamb level, the margins even, and the unit square while adding shims and fasteners.

Replace only the slab when the existing frame is solid, square, and properly aligned, and when the new door can be fitted to the same opening and hardware locations.

Replace the full unit when the jamb is damaged, loose, twisted, badly painted, incorrectly sized, or difficult to repair. A complete replacement may also be better during major remodeling.

Yes, provided the frame is reusable and the new slab matches the opening. Measure the old door, jamb, hinge locations, lock bore, backset, thickness, and swing direction before ordering.

Measure both. The existing slab helps identify the replacement size, while the frame measurements show whether the opening is square and whether the jamb can be reused.

Measure the slab width at the top, middle, and bottom. Measure its height along both sides and its thickness in several places. Also record hinge sizes, hinge positions, lock bore, backset, and handing.

Measure the rough opening width and height, finished wall thickness, floor height, and available trim space. Confirm the required door size, handing, jamb depth, and swing direction.

Jamb depth is the distance between the two finished wall surfaces. The prehung frame should match the completed wall thickness, including drywall, plaster, tile, or paneling.

Handing identifies the hinge side and swing direction. Confirm the handing method used by the supplier before ordering a prehung door, because naming conventions can vary.

It may be possible, but the jamb may need new hinge mortises, a new strike location, patched openings, and changes to the door stop. Replacing the frame may provide a cleaner result.

Yes. Order the new unit with the desired handing and swing. Check nearby walls, switches, cabinets, fixtures, furniture, and walkways before changing the direction.

Some doors can be trimmed within manufacturer limits. Hollow-core, molded, glass, engineered, and specialty doors may contain limited material at the edges, so excessive trimming can weaken the panel.

Yes, when they are the correct size, type, condition, and capacity for the new panel. Heavier solid-core or solid-wood doors may require stronger hinges or an additional hinge.

Usually, provided the hardware is in good condition and the new door’s bore diameter, backset, thickness, latch preparation, and strike position are compatible.

Not automatically. Hinge sizes and locations vary. Order the slab with matching preparation or carefully transfer the measurements from the existing door.

A slab may need uneven trimming to fit, which can produce poor results. Correcting or replacing the frame is often better when the opening is significantly out of square.

Usually, yes. The casing is generally removed to expose the jamb and fasteners. Trim that is removed carefully may be reused if it remains undamaged.

Some units include attached casing, but many do not. Confirm whether casing, extension jambs, stops, and other trim are included.

The final floor height should be known before installation. Tile, hardwood, carpet, underlayment, and thresholds affect jamb length and door-bottom clearance.

Prehung doors are commonly used because they provide a coordinated door and frame for an unfinished rough opening. The units can be aligned before casing and final finishes are installed.

A slab is practical when the existing jamb and trim are worth keeping. A prehung unit is often better when remodeling includes damaged frames, changed opening sizes, or new wall construction.

Yes. Pocket doors commonly use slab panels because they do not need a conventional hinged jamb. The panel must match the pocket frame, hangers, guides, pulls, thickness limits, and weight capacity.

The door slab may sometimes be reused, but the prehung jamb and hinges are not used as the pocket-door frame. The slab must be suitable for top-mounted hangers, guides, and recessed pulls.

Their panels may be supplied separately from the operating hardware. The doors must be compatible with the selected track, rollers, pivots, guides, panel thickness, and weight rating.

Confirm slab dimensions, thickness, material, finish, handing, hinge preparation, lock preparation, edge bevel, required clearances, and whether the door will be hinged, sliding, or folding.

Confirm rough openings, jamb depth, handing, swing, door size, frame material, hinge finish, lock preparation, floor elevation, casing, wall finish, and any project-specific requirements.