Issues with a set of French doors usually show up when the doors close. An out-of-level door frequently rubs against either the top of the door frame or its neighboring door. In the most exceedingly bad cases, an out-of-level door won't close completely. A set of level French doors have an equitably estimated crevice between every door and around sides of the frame. To level French doors, a door installer makes adjustments to the door frame.
- Slide the door frame into the doors' rough opening. Focus the frame in the opening.
- Hold an air pocket level on one of the door frame's vertical sides and adjust the vertical side until it rests plumb, using the air pocket level as an aide. Slip shims between the door frame's plumb side and the building's rough opening.
- Tack the plumb side of the French doors' frame to the building's rough opening with 3-inch drywall screws, using a drill to tighten the screws. Place a screw 8 inches from the top and bottom of the frame's side.
- Tack the French door frame to the building's rough opening with the 3-inch drywall screws. Place a screw 8 inches from every side of the frame and in the center.
- Hold the air pocket level against the top of the doors' frame. Adjust the top of the door frame until it rests level in the rough opening, using the drywall screws to raise or bring down the frame as required. Tightening the screws raises the frame and slackening the screws brings down the frame.
- Hold the air pocket level against the remaining side of the frame. Adjust the side of the frame for plumb, using the air pocket level for reference. Slip shims between the door frame's side and the rough opening. Hold the remaining side of the frame in still with 3-inch drywall screws, placing a screw 8 inches from the top and bottom of the frame and in the center.
- Install the French doors on the door frame. Shut the doors and check the holes on all sides of both doors. In the event that one door rests lower than the other, remove the tack screws on the low door's vertical frame and raise the flat part of the frame above the door with the tack screws. Reinstall the tack screws on the vertical part of the frame and recheck the doors against one another.