How to Trim Out a Window

By: Scott Gibson, This Old House magazine

Shopping List

Supplies You Will Need

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

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Tools List
Tools You Will Need
- 20-ounce finish hammer
- Hand plane,
  for trimming jamb extensions
- Measuring tape
- Router,
  for making stool profile
- Random-orbit sander,
  or hand sanding block
- Jigsaw,
  for notching stool and profiling apron
- Pneumatic nailer,
  for attaching casing
- Compass,
  for transferring marks and reveal lines
- Table saw,
  for cutting rabbet in bottom of stool
- Square,
  for marking casing, stool, and apron
- Utility knife or chisel,
  for trimming drywall and adjusting fit of stool
- Miter saw,
  for crosscutting trim pieces to length
- Nail set (to recess heads of hand-driven nails
- Drill with 1/16-inch-diameter bit,
  for making pilot holes before hand nailing
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Introduction
Overview
Steps:
- 1
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7. Cut and install the apron

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.