Step 5: Install the blocking

Installing the blocking using a drill.
Photo: Kolin Smith
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Slide a horizontal 2x4 into the opening. Hold it level, with its end butted against the next intact wall stud. Mark where it meets the cut stud, then saw it to length. Create three more pieces of blocking to fit at the top and bottom. To attach the blocking, put construction adhesive on both ends, and place it between the studs, flush with the drywall opening. Hold it in place by driving screws through the drywall and into blocking.
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    Tools List

    • 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

    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.