Replacing Double Windows With French Doors . Either way you need to comply with building regs. First off, i apologize if this is posted in the wrong place. Custom French Doors Custom French Door Replacement Chicago from americanthermalwindow.com The style and color of the door handle can be upgraded and you can also add grids, for a traditional french door look. The french doors that were installed in your home either before or after you moved are sometimes in need of a replacement. Then, build a short wall to span opening.