Step 1: Prep

before you start
Photo: Reena Bammi
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• Measure the length, width, and thickness of the old threshold, and have a replacement with a similar pro¬≠file on hand. It should be an inch or two longer than the distance between the door casing's outside edges so you can trim it for an exact fit later on.

• Remove the storm door and any weatherstripping attached to the threshold.

TIP: You'll spend a lot of time kneeling on the outside of the house. Place rubber mats on the porch, as Tom did, or invest in a good pair of knee pads.
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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