How to Pull and Reset a Base Cabinet for Access

Why this matters

Sometimes the only way to the leak, the wire or the rotted subfloor is through the space a base cabinet occupies. Cutting the cabinet's back panel works for a valve; it does not work for a wall repair or a floor patch. Pulling the whole cabinet is a two-hour job when it goes well and a cabinet, a countertop and a floor when it does not. The cabinet itself is rarely what breaks. What goes wrong is the countertop cracking because nobody supported it, the floor scratched because the box was dragged, and a reset that sits 1/8 in off its neighbor so the countertop seam no longer lines up. All three come from not knowing what holds the cabinet before you start.

What holds a base cabinet

 FRONT VIEW (top removed)        SIDE SECTION
                                   wall
  stud       stud                   |   countertop
    :          :                    |==C=========C==
 +--:----------:--+                 |W+----------+
 |  W          W  | upper rail      |s|          |
 |F+------------+ |                 | |          |
 | |            |F|                 | | cabinet  |
 |F|   drawers  | |                 |W+          |
 | |            |F|                 | |  +-------+
 |F+------------+ |                 | |  | toe
 |  W          W  | lower rail    ==+=+s=+=====s==
 +----------------+                    floor
 |___toe kick_____|
   s            s

 W = screw through back rail into a stud
 F = screw through face-frame stile into the neighbor
 C = screw up through a corner block into the top
 s = shim: under the box at the floor, and behind
     the back rail where the wall is out of plane

Three sets of fasteners, and one set of shims that is easy to lose. Wall screws go through a hanging rail at the back (an upper one always, often a lower one too) into studs. Face-frame screws join the cabinet's front frame to its neighbor's, usually two or three per side, often hidden under a hinge or behind a drawer slide. Countertop screws come up from below through corner blocks or a top rail into the underside of the top, and must be short enough not to come through it. Shims under the box set it level, and shims behind the back rail keep the wall screws from pulling the box out of plumb where the wall is wavy. The shims are the cabinet's adjustment, and once they fall out on the floor, that adjustment is gone.

The steps

1. Empty it and record it. Take out drawers and contents. Photograph the inside, the underside where you can see it, the shims at the floor and the reveal (the gap line) between this face frame and its neighbors. Why: the photos are the only record of how this cabinet was leveled. Skip it and you are re-leveling a cabinet from scratch against a countertop that was set to the old position.

2. Disconnect what runs through it. Water: close the supply stops and open the faucet to confirm they hold; if a stop will not hold, close the main before going further, because an undersized drip becomes a flood with the cabinet half out. Disconnect drains at their slip nuts over a bucket. Power: a cord-and-plug disposal or appliance unplugs. A hardwired disposal, under-cabinet light or receptacle is turned off at its breaker and proved dead with a tester checked on a known live source before and after; if nobody on site is qualified to disconnect and cap a hardwired circuit, an electrician does that part. A gas line that passes through a cabinet is not disconnected on this job; slide the cabinet so it never touches or bends that line, and if it cannot come out without moving the line, stop and call a licensed gas fitter. Skip any of this and the cabinet is tethered and something tears when it moves.

3. Free and support the countertop. Back out the countertop screws from below. Cut the caulk at the backsplash and along any wall edge with a knife. Then decide: if the top continues over neighboring cabinets, either it comes off (see related: How to Lift a Countertop Section Without Cracking It) or it stays and is supported where this cabinet used to be, with a temporary 2x4 leg or prop at the front and the back of the unsupported span. Why: the top's weakest points are its narrow sections at a sink or cooktop cutout, and an unsupported overhang loads exactly those. Skip it and a laminate top cracks at the corner of the sink cutout, and a stone top is a fabricator's problem you created.

4. Back out the wall screws, then the face-frame screws. That is the reverse of installation: when cabinets go in, each one is clamped to its neighbor, screwed through the face frame, and screwed to the wall last. Remove the wall screws first while the face-frame screws still hold the box in alignment. Before the last face-frame screw comes out, someone holds the box. Keep the screws in labeled bags by group. Why: the box goes from fixed to free one step at a time, not all at once with its weight on one screw. Hazard: the drill and the box are in a tight space; keep fingers out from between the face frames when the last screw lets go, because the box shifts toward the gap.

5. Mark and bag the shims. Before the box moves, put tape on the floor at each shim and on each shim, with the same number, and photograph them. Then bag them. Why: the floor under a cabinet is rarely flat, and those particular shims at those particular points are what made the top level. Skip it and you will re-shim and the top will not land on its old plane.

6. Slide it out straight, lifted, not dragged. Lift the front just enough to slip moving pads or a folded moving blanket under the box, then pull straight out from the wall. Do not twist it; a corner of the box catches the neighbor's face frame or an appliance's side. Why: the bottom edge of a cabinet box with grit under it scratches any floor, and a box twisted out tears a face frame. Lift with your legs, two people for anything over about 30 in wide, because a full-height base in particleboard is heavier than it looks.

7. Reset to the same shims, then to the neighbor, then to the wall. Set the box on its numbered shims in their marked spots. Check level front to back and side to side, and plumb on the face. Clamp the face frame flush with its neighbor and screw it, then shim behind the back rail at each stud and screw to the wall without pulling the box back out of plumb. Reinstall the top fasteners, reconnect, and test. Why: order matters on the way back in for the same reason it did coming out. Skip the shims behind the rail and the wall screw draws the top of the box into the wall's hollow and tips the face.

8. Put back what went back in, and prove it. Reopen supply stops slowly and watch every reconnected joint under the cabinet for a full minute with a dry paper towel against it. Restore power at the breaker with your hand to the side of the panel door, not in front of it, and confirm any GFCI protecting the cabinet's circuit trips and resets with its test button.

Worked example: a 24 in base beside the fridge

A plumber needs to reach a leaking tee in the copper line inside the wall behind a 24 in drawer base, at the end of a run, next to a refrigerator alcove. The sink base is on the cabinet's other side. The laminate top runs continuously over the sink base and this cabinet and ends at the fridge with a finished end.

What holds it, found by looking before touching: 4 countertop screws, one through each corner block; 4 wall screws, two through each of two back rails into two studs; 3 face-frame screws into the sink base stile, one each high, middle and low. That is 4 plus 4 plus 3, 11 fasteners. Shims: 4 at the floor, at the corners, and 2 behind the upper rail at the studs. That is 6 shims.

Countertop support. With this cabinet gone, the top over it is a 24 in overhang off the end of the sink base, and the sink cutout's front strip is about 15 in from that overhang. The plumber sets a 2x4 prop at the front and one at the back, snug to the underside, before the box moves.

Out. No power in this cabinet. Its only water is the leaking line in the wall, and the main is shut before the box moves, since a fridge valve downstream of the tee would not stop the leak. Wall screws out first, then face-frame screws while the helper holds the box. Shims taped and numbered 1 to 6, photographed, bagged. Box slid out on a moving blanket. Behind it: a wet stain on the drywall about 10 in across and a corroded tee. No visible mold growth on the drywall; had there been growth over a large area, the work would have paused for containment and respiratory protection under a written program per OSHA 29 CFR 1910.134 (applied to construction work by 29 CFR 1926.103) before anyone cut the wall.

In. Wall opened, tee replaced, main reopened slowly and the new joint watched dry for a minute, then the wall patched. Box set back on shims 1 to 4 in their tape marks. The level reads front to back as it did in the photo. Clamped flush to the sink base face frame, and the reveal checked against the photo: flush to within 1/32 in, which is the shop's acceptance line for a face-frame joint. Shims 5 and 6 slid behind the upper rail at the studs, wall screws in. Props out. The top drops onto the corner blocks with no gap anywhere along the cabinet that a 1/32 in feeler will enter; four countertop screws in. The fridge supply and its valve stem checked dry once more before the fridge goes back.

What would have happened. Without the props, the overhang alone hangs off the sink base, and laminate tops crack at the inside corner of a sink cutout exactly that way. Without the numbered shims, the reset box would have needed fresh leveling against a top that had already settled on the old position.

What changes the job

• A sink base. Add the sink: faucet supplies, drain, disposal and dishwasher drain all disconnect, and the countertop almost always has to be lifted, because the sink is in it.
• A corner or a cabinet in the middle of a run. It cannot slide straight out with neighbors on both sides and a top above. The top has to come off, or the neighbors come out first.
• A cabinet set on a finished floor versus a subfloor. Older installs set cabinets on the subfloor, with the finished floor run up to the toe kick. Pull that cabinet and the floor under it is unfinished; resetting it is the same, but a floor repair under it is a different job.
• Stone or quartz tops. The top does not get propped and left, and the cabinet often cannot come out without the top coming off first, which is the fabricator's work.

How to verify

Before you leave: the same level readings as the photo, face frame flush to the neighbor at the shop's tolerance, no countertop gap at any corner block, every screw from every bag back in or accounted for, no drip under any reconnected joint after a minute dry, and power restored with any GFCI tested. The ticket records what was pulled, the fastener and shim count, and anything found behind it.

References

• OSHA 29 CFR 1910.134, Respiratory Protection, for mold disturbance beyond a small area; 29 CFR 1926.103 applies it to construction work
• Cabinet manufacturer installation instructions, for shim and fastener placement
• See related: Built-In Appliance Removal in Finished Cabinetry; How to Remove and Reinstall Toe Kicks and Appliance Panels; How to Protect a Customer's Home Before a Messy Job