Georgian and Victorian glazing bars were designed to accept single glazing in the days when glass could only be made in relatively small sheets.
Trying to replicate authentic-looking narrow bars in a window fitted with a modern warm-edge drained and vented sealed double glazed unit is simply not possible, and full of pitfalls for manufacturer and customer alike:
Get it right and it looks really good. Get it wrong and it can be ugly and/or troublesome.
At SupaSash, we're sure we've got it right!
These are all NEW SupaSash double-glazed windows with slender glazing bars to match the appearance of the single-glazed originals, and EXCEED the Building Regulations....BEAT THAT. Retaining the old box saves an enormous amount of work and cost.
Double-glazing, perhaps with slender glazing bars to exactly retain the traditional appearance while EXCEEDING the requirements of the Building Regs.
Most of these are new sashes in their old boxes.
the greenest option