Some garage doors are.
Garage door header rotten.
Over the years the garage door header has sagged du.
Step 1 remove the garage door header.
Lay one board on the garage floor to act as a sill plate.
You can t replace a 16 chunk of it and retain any structural integrity.
Pry on the crowbar to lift the trim and loosen it.
The best way to fix this problem is to replace the header.
Take down any trim or any external pieces of wood which are not part of the garage door header.
Garage doors typically don t require much in the way of regular maintenance but one problem that is not uncommon is rotting door jambs.
The jambs are vertical boards that form the side parts of the frame around a garage door.
Stand the other 2x6 on top of the sill plate and slip its upper end underneath the header that spans the garage door opening.
It is a good idea to sandwich 1 2 plywood or osb between the pieces of 2x dimension lumber.
Insert the tip of a flat crowbar under the trim.
Door jambs are susceptible to wood rot due to their exposure to ground level moisture.
Use a hammer to tap the 2x6 to a vertical position where it ll raise the header and release the downward pressure on the rotted post.
If any portion of your garage door header has rotted or softened due to water exposure you need in replace the entire header.