Can I repair French doors' water damage while they're still hanging?
I have french doors that open to outside. The doors swing in- Notice what looks like water damage at bottom of jam. Can this be repaired while doors are still hanging?
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You did not mention what the threshold is made of. You also didn't say how much damage there is. This is all important. If wood and the damage is cosmetic, I would do a light sanding to remove the old finish and as much of the discoloration as you can then use a Danish Oil wipe on finish. Use several coats following the directions on the can.
If there is actual rot in the wood, replacement is the usually best choice. You should be able to replace it without removing the doors, but this is very dependent on your skill level.
You can do a repair with Bondo, auto body filler. Dig out/remove any rotted wood. Over f ill with auto body filler. As it gets to a rubbery stage you can trim and form it with a knife or razor blade. Let fully harden. Sand, prime, and paint.
Best of luck on this!