My brother did this to two large bay windows in a Victorian House. The cost was about £10,000 and they used local Brighton firm Sash Heritage Restoration. I know they were very happy with the outcome. If you are trying to restore your Victorian double glazed sash windows make sure you get more than one quote and check out smaller companies like Sash Heritage Restoration as they are good and do it cheaper
J.A. Burns, Brighton
Double Glazed Sash Window Repair
I looked into this as well. It’s possible to double glaze an existing sash window, although it seems the glazing is very narrow and may not adhere to some building regulations. It will however prevent heat loss as you’d expect, perhaps not as much as current double glazed window standards.
The alternative (which is far more expensive) is to adapt the entire sash window frame and put proper current standard double glazing in. This isn’t an option with heritage sash windows like those on listed buildings but talented firms like Sash Heritage Restoration can reshape a more modern sash window this way.
Mrs. P Frisbee, Hove
I looked in to this for our heritage sash windows but our sashes didn’t have enough window depth. We opted for sash window refurbishment, restoration and draught proofing rather than taking out the originals. We used Sash Heritage Restoration in Brighton and I’m sure we’ve made the right decision. The room is warmer and the freezing draught that the sash windows made for years is notably absent. I’m glad we didn’t make any changes to the old sash windows as they are a heritage feature and the sash window repair company used real aged wood to match the original.
Col. T Tottworth, Brighton
Sash windows restored to heritage standards
My wife and I looked into double glazing our heritage sash windows. It would have been about £20,000 for all our windows. We have two bay sash windows and five other sash windows throughout the house. We opted to get a small firm, Sash Heritage Restoration to restore the existing sashes, to replace brushes, bits of rotting wood, and to install unobtrusive double glazing; the total cost was about £4000. The benefits of the repairs to the sash windows was immediate and tangible; the temperature in the living room went up by 4 degrees.
Roger Hardbottom, City of Brighton & Hove, Sussex