These doors which are constructed with solid framing around a center of glass panes.
Turn a window into a french door.
Here is a recent response on cost to install a sliding glass door which is quite a bit easier than a french door but same general size.
You need to look at your current window and figure out how much of the window cutout you can use for your new bi fold french doors.
So you ve just built a new deck on the back of your house and those once lovely double windows in the living room would now make a better door sliding glass or french out to that awesome deck.
Because you are almost certainly going to be increasing the width of the opening and very likely raising and lengthening the support header over the window as well you are going to to be above the cost in the referenced comments probably in the 2000.
You will want to measure the height and width.
Converting standard doors to french doors allows light into rooms in a unique way.
Dan faires explains why it s better to let a professional install french doors.