How to Replace a threshold with This Old House

Watch this video from This Old House to learn how to replace an old threshold.

Steps:

1 Remove old threshold from doorway using hammer and reciprocating saw.

2 Use reciprocating saw to cut the nails securing toekick; remove toekick.

3 Test-fit new threshold in doorway.

4 Build up toekick and subfloor with pressure-treated lumber; re-install toekick.

5 Apply bead of tri-polymer caulk to joint between finished floor and new threshold.

6 Install new threshold, then tap shims underneath.

7 Close door and check for even gap along threshold.

8 Open door, and apply expanding polyurethane sealant under the threshold.

9 Close the door, then tap shims between door bottom and top of threshold; leave shims in place until the sealant cures.

10 Sand threshold, then finish with an exterior paint or stain and topcoat that contains a ultra-violet protector.