Replace Rotted Door Frame Threshold

Remove the old door sill from beneath the door frame.

Replace rotted door frame threshold. Know the parts that make up the exterior door threshold. My techniques show you how to adjust and seal up your thre. Position the old door sill on the new sill and trace. The new threshold should have a similar profile to your old threshold and be 1 to 2 inches longer than the length of the doorway so that you can cut it for an exact fit.

How to replace a door threshold in 9 steps step 1. Measure between the outside edges of the door casing. Measure from the threshold to the bottom of the door stop. Use a scrap of the door jamb to scribe the threshold angle transfer the angle to the door stop on the replacement jamb and notch the jamb.

Prep with replacement at the ready photo by reena bammi. The door sill or threshold is the bottom portion of your exterior door frame. Mix polyester wood filler or bondo wood filler and press it into the recess with a putty knife. Carefully measure the doorway for the new threshold.

If the threshold is rotted the sill probably is too. Measure the length width and thickness of the old threshold and have a replacement with a similar pro file on. If your threshold is in rough shape replace it. Remove the screws holding the metal threshold in place.

Cut the rotten door sill into pieces using an oscillating tool or circular saw. In this video i explain in detail how to repair a rotten door threshold with fiberglass and bondo. Most exterior thresholds also have a sill beneath them. How to use epoxy on wood for repairs.

The sill is beveled on one side to drain water away from the house. It helps to keep the elements out and provides a seal as well as a place to step as you enter the home. Thresholds come in wood and metal both of which come with a rubber gasket for sealing out the cold. To repair rotted door frame first remove rotted wood with a 5 in 1 or other sharp tool.

Then coat the rotted door frame area with wood hardener as shown. Click enlarge this image to view illustration labels. Measure and cut the replacement jamb to length. These thresholds wear out over time because of foot traffic and exposure to the weather.