Step 7: Cut and install the apron

trimming out a window «»
Hold a length of apron stock face down on the stool. Mark the stock where it meets each side casing's outside edge. At the marks, make square cuts with a miter saw.

To dress up the ends of an apron, hold the end of a scrap apron piece perpendicular to the face of the piece just cut. Face the scrap's profile toward the end of the apron and make the edges flush. Trace the scrap's profile onto the face of the apron. Repeat on the other end. Cut along the pencil lines with a jigsaw or coping saw, and sand smooth.

Apply glue along the top edge of the apron, align its ends with the outside edges of the side casing, and press the top edge against the bottom of the stool.
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    Tools List

    • finish hammer
      20-ounce finish hammer
    • hand plane
      Hand plane,
      for trimming jamb extensions
    • 16-foot tape measure
      Measuring tape
    • router
      Router,
      for making stool profile
    • random orbit sander
      Random-orbit sander,
      or hand sanding block
    • jigsaw
      Jigsaw,
      for notching stool and profiling apron
    • pneumatic finish nailer
      Pneumatic nailer,
      for attaching casing
    • pencil compass
      Compass,
      for transferring marks and reveal lines
    • table saw
      Table saw,
      for cutting rabbet in bottom of stool
    • try square
      Square,
      for marking casing, stool, and apron
    • utility knife
      Utility knife or chisel,
      for trimming drywall and adjusting fit of stool
    • miter saw
      Miter saw,
      for crosscutting trim pieces to length
    • nailset
      Nail set (to recess heads of hand-driven nails
    • drill
      Drill with 1/16-inch-diameter bit,
      for making pilot holes before hand nailing

    Shopping List

    1. WOOD MOLDING

    2. CARPENTER'S GLUE

    3. PENCIL

    4. PAINT OR STAIN

    5. 120-GRIT SANDPAPER

    6. WOOD PUTTY

    7. 4D AND 8D FINISHING NAILS