Memorize the bubble s position.
Prehung door over uneven floor.
How to install a prehung interior door parts of a prehung.
Prehung doors hang on a jamb that is split into two pieces.
Set the frame back into the opening.
The pre hung door will come with long sides on the frame.
If the bubble doesn t settle in the exact spot find an accurate level.
An accurate level is crucial for a good installation.
This will allow you to cut each side of the door frame according to how level the floor is.
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Then flip the level end for end and check the bubble.
The sill that comes attached to the door is normally 1 1 4 inches high.
Remove any old door and molding such as a casing or bottom threshold inside the opening.
Use your level to check the head and jambs to check that it is level.
The split jamb has a groove under the stop so it can slide over the edge of the main jamb.
Pro tips for how to install a prehung door.
When installing an exterior door be sure to not to install the door too low.
Check it by laying it on a flat surface.
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Spacing exterior door off the floor.
Determine if the floor is level where the door will be hung.
Check the length of your prehung door jambs.
Cut the sides of the door frame if the floor isn t even.
Typically both jambs are furnished with casings already attached.
If there is still a large gap at the base of the door you may cut both jambs by an equal amount to narrow this gap.
The door is attached to the main jamb which is installed first.
Sometimes the door even drags on the carpet.