Step 2: Mark and cut the wall opening

Cutting along pencil lines, using keyhole saw.
Photo: Kolin Smith
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Have a helper hold the cabinet against the wall, positioned at a comfortable height (see Overview for guidelines). Check it for level and plumb. When you're satisfied with its position, trace the cabinet's outline onto the wall in pencil.

Use a keyhole saw to cut along the pencil line. Remove the drywall inside your cut line, being careful not to mar the remaining wall. You may have to break off pieces of drywall still attached to the studs.
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    Tools List

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    • studfinder
      Stud finder
    • utility knife
      Utility knife,
      to score drywall
    • keyhole saw
      Keyhole saw,
      to cut openings in wall
    • flashlight
      Flashlight
    • two-foot level
      Level
    • hacksaw blade
      Hacksaw blade,
      to cut drywall screws
    • hand saw
      Handsaw (to cut studs
    • rasp
      Rasp,
      to tailor the drywall opening to fit
    • drill
      Drill/driver

    Shopping List

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    1. Medicine Cabinet: Look specifically for cabinets labeled "recessed," though a surface-mount cabinet can be converted into a recessed one, as long as its sides can slip into the wall cavity without obstruction.

    2. 2x4 Lumber: For the blocking, which makes the frame to which you'll fasten the cabinet. Use scraps if you have them, or one 8- to 10-foot piece should be enough.

    3. Construction Adhesive: To help attach the blocking.

    4. 21/2-inch Decking Screws: To fasten th blocking to the studs.

    5. 11/2-inch Drywall Screws: To hold the cut drywall edges to the blocking and to mount the cabinet.

    6. Caulk (as needed): To fill gaps between the cabinet frame and the wall.