We are in the midst of a kitchen renovation on our 16th c. farmhouse. We have purchased salvaged steel frame windows that are being refurbished. We have been unable to find information about how to build new jambs in the new (stone) window openings. Our first and most important question is how much of a margin should be left in the openings to accommodate the jamb for fastening the windows to the house? Does anyone know of a place or resource for installing steel frame windows?
Thank you for any advice you can offer.