How to Repair a Door Threshold Extension

Repairing a door threshold extension can take from 1 to 2 days to complete.There are different threshold extensions available. An extension is an additional part of the threshold and allows for increased weather protection from snow or heavy rain entering the home. Make sure to do the repair with the correct one. Take measurements before beginning work.

Step 1 - Remove Existing Threshold

If the door is not going to be removed, cut through the middle of the threshold board with a backsaw. Make sure to take care not to cut the trim or floor. Some thresholds have screws. Take a screwdriver or drill and remove. Put on work gloves and safety goggles. Take the chisel to get under one half of the threshold. Then use the pry bar to remove.

Step 2 - Clean the Area

Thoroughly clean the area and look for any water damage. If there is any, a contractor must be called in. If not, take the waterproof caulk and apply. Flashing can also be installed in desired, though two beads of caulk will work well.

Step 3 - Install New Threshold and Extension

Many extensions can come with the threshold. Measure and cut the threshold to fit. Make sure to leave notches for the extension to push through. Close the door to make sure the fit is correct. Install extension into the notches. Take the new screws and fasten the threshold in place.