How To Remove and Replace a Threshold

Under 2 hours

Learn instructions for removing and replacing an interior and exterior door threshold

Replacing an Interior and Exterior Threshold

Thresholds play an important role in the entry to your home. There primary function is to keep warm air in and cold air out, and vice versa in the summer. They are also an important tool to help keep bugs at bay. Because they withstand a lot of traffic, make sure your threshold is of good quality to increase durability.

This guide details how to remove an old interior and exterior door threshold and replace it with a new model.



Remove the existing threshold
Install new exterior threshold - Replacing Interior Exterior Threshold

Begin by removing your existing threshold from your door. You'll want to first cut the old threshold with a back saw. Then you can dislodge it with a pry bar. Once it is removed, clean the area thoroughly.

Measure the opening for new threshold
Measure opening new threshold - Replacing Interior Exterior Threshold

Carefully measure the opening for the new threshold, and cut to fit. Next, lay a bead of caulk along what will be the back edge of the threshold. Now position it as you want it, making certain the angle is sloping slightly away from your home so water does not build up near your new threshold.

Secure the new exterior threshold
Secure new exterior threshold - Replacing Interior Exterior Threshold

Insert the screws in the holes indicated along the length of the threshold. Finally, test the fit. If it is too tight, you can plane down the door or lower the threshold.

Replacing an Interior Threshold

Interior thresholds cover floorboard edges that end at a door and serve as a transition element to other flooring materials such as carpet, vinyl and ceramic tile. Most thresholds are wood, although you also can buy plastic, solid-surface versions similar to solid-surface countertops. No matter what the material is, thresholds serve a decorative as well as a functional purpose in smoothing the way from room to room. Here's how to replace an interior one:

Remove nails from the old interior threshold
Remove nails interior threshold - Replacing Interior Exterior Threshold

If the door stops are undercut but the jambs are not use a hammer and prybar to remove the nails from the threshold, and hammer it out from under the stops.

Remove the door jambs
Remove the door jambs - Replacing Interior Exterior Threshold

If the doorjambs were undercut to accommodate the threshold, saw it into two pieces, and remove each piece separately.

Undercut the door stops and cut threshold to length
Undercut door threshold length - Replacing Interior Exterior Threshold

Before installing a new wood threshold, undercut the doorstops, if necessary, then measure carefully and cut the threshold to length.

Secure the new interior threshold
Secure new interior threshold - Replacing Interior Exterior Threshold

Predrill pilot holes, and nail the threshold to the floor with flooring. Or counterbore the threshold, and fasten it with countersunk wood screws.