I'm in the process of refurbing our sash windows. The top and bottom sashes of most of the windows in the house are out of alignment. Photo attached.
There's a 1 inch overlap of the meeting rails. This makes locking the windows and fitting draught proofing difficult.
Were the windows built like this for a reason or is there some movement in the windows causing this?
Should I leave this as is when refurbing the windows or remove some of the frame from the top and bottom sashes to they are flush?