We work on many historic buildings, which have period glass fitted, if broken we are able to procure replacements to match existing.
If modern clear float glass is fitted in these buildings the difference would be very apparent and not in keeping with the history of the building.
There is a variety of period glass available; “Crown”, “Baltic” and “German Cylinder” to name but a few. There are also less expensive alternatives such as “D Lam” and “D Rest”.
Period glass has its own unique pattern such as the ream of the glass, seeds and small air bubbles. These imperfections are the truth characteristics of hand blown glass.