How to Replace an Exterior Door

DIY techniques for a weathertight exterior door installation

Required Tools for this Project

Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

  • Pry bar
  • 2-ft. and 4-ft. levels
  • Caulk gun
  • Reciprocating saw
  • Miter saw

Required Materials for this Project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.

  • Treated lumber to build up the sill (optional)
  • Roll of flexible self-sticking flashing membrane
  • Two tubes of polyurethane caulk
  • Two cans of minimal expanding foam
  • Roll of foam caulk backing (optional)
  • Transition molding Transition molding (optional; Photo 13)
  • One pound each of 10d and 16d galvanized casing nails
  • One pound of 3-in. coated deck screws
  • 4d, 6d and 10d finish nails