Step 5: Lay Out the Notch

Lay out the notch
Photo: Reena Bammi
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• The ends of the new threshold have to be notched to fit around both door jambs. This creates a "horn" that extends under the casing. First, measure the width of the right-hand casing, then hook the tape on the threshold's back right-hand corner and transfer that measurement to the threshold's back edge.

• Next, measure the width of the jamb and stop, hook the tape on the same corner, and transfer the measurement to the end of the stock. Use a square to draw a perpendicular line from each mark until both lines intersect.
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    Tools List

    • 16-foot tape measure
      Measuring tape
    • reciprocating saw
      Reciprocating saw (with wood-cutting blade)
    • bar flat
      Flatbar
    • hammer
      Hammer
    • chisel
      Chisel
    • speed square
      Square
    • circular saw
      Circular saw
    • hand saw
      Handsaw

    Shopping List

    1. BORATE SOLUTION
    (if needed, for rotting wood)

    2. SELF-ADHERING FLASHING MEMBRANE

    3. 120-GRIT SANDPAPER

    4. SHIMS

    5. EXPANDING FOARM SEALANT

    6. SPAR VARNISH