I just installed interior french doors. The doors are level. When I went to attach the frame to the outside of the door, I discovered that it would not match up evenly to the door jamb at the top of the door opening in the wall. After doing some measuring, I discovered that the bottom part of the wall is narrower than the top part of the wall. In other words, the outside of the door frame fits perfectly with the bottom of the door jamb, but at the top it is about a 1/4 inch off (exactly the same as the difference in the width of the wall). The door is level sitting in the gap in the wall, but the wall is not plumb going all the way up.

My question is simply how do I go about "fixing" this issue? I guess I could attach the frame and fill it with putty, but that's not exactly the option I was hoping for. How else can I deal with this while keeping my door level. thanks.

 

The doorway opening is rarely plumb/square, but the door and its' frame should be. You need to shim the door jambs to keep it plumb. Then nail thru the door jambs and shim into the house framing. When you install the casing molding, everything will be fine.