How to Remove Door Casing and Crown for Reuse

Why this matters

Casing and crown are the trim pieces that frame a room, and they are the ones a customer notices first when they come back wrong: a miter that no longer closes over a door, a crown piece reinstalled upside down, a head casing with a split corner. They are also the pieces a low-voltage installer, an electrician or an HVAC tech removes to hide a cable or reach a box, because the cavity behind them is the easiest path in a finished house. Getting them off whole depends less on strength than on order: which edge lets go first, what is holding the joints together, and what supports a long piece while its nails are coming out.

Baseboard removal has its own card, and the general fastening pattern is in How Trim Is Fastened: Baseboard, Casing and Crown. This card covers the two pieces whose joints are the hard part.

Decide first whether it can come off at all

Some trim is not removable for reuse, and finding that out halfway through costs you the piece and the wall. Check before you pick up a bar:

• Glued crown or casing. Trim set in a full bead of construction adhesive does not walk off. Test at one spot: open a gap of about 1/16 in at a nail with a thin bar. If the gap opens only at the nail and the board stays bonded on both sides of it, there is adhesive behind. Glued trim pulled anyway tears the drywall face paper and usually breaks.
• Plaster cornice. Crown that is part of the plaster, run in place or cast and set in plaster, is not trim. It cannot be removed and replaced; it is cut and repaired by a plasterer.
• Foam or polyurethane crown. Lightweight molded crown is normally glued and caulked along both edges and its outside corners. It tends to tear at the glue line. Plan to replace it.
• Old built-up crown. In older houses, crown may be two or three pieces nailed to each other and to blocking, under many layers of paint. It can come apart into its components, which is fine if you number them, and the old wood may be brittle. Go slowly or hand it to a finish carpenter. See related: When a Finish Repair Belongs to a Painter or Finish Carpenter.
• Legacy paint. Painted trim in a house built before 1978 is presumed to carry lead. Run The Legacy Material Check Before You Disturb a Finish first; the steps below use no heat and no sanding, which keeps them out of the prohibited practices of the RRP rule, 40 CFR Part 745 Subpart E.

If any of these apply and the work behind the trim is still needed, the job changes: the trim is replaced or the route changes. Write that on the estimate before starting.

The job used through these steps

A low-voltage installer is running a speaker cable from a ceiling-level path down to a wall plate beside a bedroom door in a 2003 house. The route: along the top of the hall wall behind 3 5/8 in crown, then down the hinge side of the door, in the gap between the door jamb and the framing, behind the casing. The crown run is 88 in long, from a coped inside corner to an outside corner where it meets a 24 in return piece around a soffit. The door is a 30 in interior door with 2 1/4 in casing, mitered at the head. Painted finger-jointed pine throughout, caulked at every wall edge. No adhesive found at the test spot.

The steps

1. Cut the caulk and paint film on both edges of every piece. On casing, that is the wall-side edge and the jamb-side edge at the reveal (the small step, usually about 3/16 in, between the casing's inner edge and the face of the jamb). On crown, the ceiling edge and the wall edge. Use a sharp knife at a shallow angle. Why: paint bridges trim to the wall and to the jamb, and when the trim moves, the film tears the weaker surface, which is the wall's paint and the jamb's paint. Skip it and you are patching and painting a jamb and a ceiling line you never meant to touch.

On this job: all four edges of the crown run and return, both edges of both casing legs and the head. About ten minutes. The tech works the crown from a stepladder set so the run is within easy reach without leaning past the rails, and never stands on the top cap.

2. Release the jamb-side edge of the casing first. The inner edge is pinned to the jamb edge with small brads, usually every 12 to 16 in. Slip a thin bar or a stiff putty knife into the reveal behind the casing and lever against the jamb, which is solid wood, not against drywall. Open each brad point about 1/8 in, working up one leg, across the head, and down the other. Why: that edge is held by small fasteners into a hard surface, so it gives first and cleanly, and once it is free the casing pivots on the larger wall-side nails instead of tearing around the small ones. Pry the wall side first and the board pivots on the brads, which tear through the thin inner edge or split the profile.

On this job: the hinge-side leg and the head are freed along the jamb edge. The latch-side leg is left alone; the cable does not need it, and every piece not removed is a piece that cannot be damaged.

3. Find out what holds the miter. Head-to-leg miters are almost always glued, pinned with a brad shot across the joint, or both. Look at the top edge of the head: a filled hole near the corner, angled toward the leg, is a cross pin. Why: a pinned or glued miter will not separate by levering; force it and one side of the miter snaps, and a broken miter cannot be closed again. Either take the leg and head off together as one assembly, or cut the cross pin first by slipping a thin flush-cut oscillating blade or a hacksaw blade into the joint from the back as the pieces start to open. Hazard: that blade is cutting blind behind trim near a switch or outlet box; if any box sits within the reach of the blade, turn off the circuits feeding that wall at the panel and prove them dead with a tester checked on a known live source before and after.

On this job: the hinge-side miter has a cross pin and glue. The tech has the head partly released, so the assembly would be a 35 in head plus an 82 in leg in an L, awkward and fragile. A switch box is 4 in from the latch-side leg, not the hinge side, so the oscillating blade stays well away from it; the tech still turns off the bedroom circuit, because the cable feeding that box could cross the wall above the head, where the blade will be working. The blade is slipped behind the miter and cuts the pin. Glue holds the joint for one more second, then lets go along the glue line with a light twist. Both pieces whole. With the blade work done, the bedroom circuit goes back on and the tech tries the switch and a receptacle on it to confirm power is restored.

4. Release the wall-side edge at the framing, with a shim. The outer edge is nailed through drywall into the trimmer stud beside the opening and, at the head, into the header. Lever with a shim between the bar and the wall so the bar's heel bears on several square inches of drywall, not a point. Why: the drywall beside a door is backed by framing almost everywhere, but the bar still crushes the face if it bears on a point. Skip the shim and there is a crushed groove right where the casing has to sit flat when it goes back.

On this job: the hinge leg comes off, then the head. The cable path down the jamb gap is now open.

5. Support crown along its whole length before the last nails go. Crown is nailed along the bottom edge into the wall's top plate and along the top edge into ceiling joists or blocking. Release both edges a little at a time along the run. Before the final nails, get support under it: a helper, or a second ladder with a padded rest, so the piece never hangs from one end. Why: an 88 in piece of finger-jointed crown hanging from a nail at one end bends at its weakest section, usually a finger joint or right at the miter. Skip it and the piece snaps or the miter tears off.

On this job: the outside corner is glued between the 88 in run and the 24 in return. Rather than take off a 112 in L, the tech releases the return's nails first, then cuts the corner's cross pin from behind with the flush blade as in step 3, and the glue line parts. The run comes down supported at both ends by the tech and a helper. The coped end at the inside corner swings out last, so the cope is never pried against the adjoining piece.

6. Pull nails through the back, then mark position and orientation on every piece. Draw each nail through toward the back with end nippers. Then write on the back with a pencil or on painter's tape: the piece's location, which end goes where, and on crown, which edge is the ceiling edge. Why: crown looks nearly symmetrical, and reinstalled upside down it sits at the wrong spring angle (the angle it leans out from the wall), so the miters never close and the shadow line reads wrong to anyone who looks up. Casing legs are mirror images and swap easily. Skip it and reinstall becomes a guessing game.

On this job: crown marked "HALL N WALL, CEILING EDGE UP, COPE AT EAST", return marked "SOFFIT RETURN, CEILING EDGE UP", casing marked "BR DOOR HINGE LEG" and "BR DOOR HEAD, HALL SIDE". Every nail pulled, every piece laid flat on a drop cloth in the bedroom and taped together at the ends. See related: The Salvaged-Material Handling SOP.

What the job came to

Four pieces off whole: an 88 in crown run, its 24 in return, an 82 in casing leg and a 35 in head. Two miters separated by cutting a cross pin rather than prying. One ceiling-line paint chip about 1 in long where the first knife pass ran shallow, noted for touch-up. The installer runs the cable, and the trim goes back the same day. See related: How to Reinstall Trim So It Goes Back Where It Came From.

What would have changed it. The test spot finding adhesive on the crown would have ended the crown half of the plan: the installer would have run the cable along the ceiling in a paintable raceway or through the attic instead, and written that change on the ticket for the customer to approve. A 1960s house would have put the paint question first and added the RRP practices to every step. And a pinned miter pried apart instead of cut would have left a snapped casing leg, which in a house this age means matching a stock profile; in an older house with a discontinued profile, it means a finish carpenter making one.

How to verify you got this right

Every removed piece whole, or its damage photographed and on the ticket. Every piece marked with location and orientation, and on crown, the ceiling edge. No nails left in the pieces or standing in the wall, jamb, plate or joists. Every caulk line that was cut listed, so the reinstall knows what to recaulk. And every piece you did not need to remove still on the wall.

References

• EPA, 40 CFR Part 745 Subpart E (RRP), for painted trim in housing built before 1978
• See related: How Trim Is Fastened: Baseboard, Casing and Crown; How to Pull Baseboard Without Splitting It or the Wall
• See related: The Legacy Material Check Before You Disturb a Finish; When a Finish Repair Belongs to a Painter or Finish Carpenter