Double glazed units for Georgian sash windows

The Channel 4 programme Grand Designs recently featured the restoration of an old industrial building near Bath. The planning authority allowed the use of double glazed units that would fit into traditional Georgian windows. These units were only 10mm thick and were filled with a mixture of xenon and krypton. I am considering replacing the glass in my windows and would welcome advice on where to find such units. Are there a number of companies that manufacture them?

Guest User
Sun, 01/02/2009 - 09:53

It sounds like we are in the same boat. We loose a huge amount of heat through them and my eyes lit up when i saw those units and by the time i have bought some the bank balanace will probably light up too, red!
The firm concerned is
As for the prices i do not know yet but i am expecting a reply soon.

Guest User
Fri, 13/02/2009 - 21:23

I have a similar problem, I own a delightful arts@crafts house with custom(on-site I think) joined casements with hand painted stained glass upper sections. There are 32 hand-crafted stained glass sections which lose heat, I can live with that beauty; below each is a bland rectangular panel I wish to double glaze in situ, the rebate is 12mm so to discover the "slimlite" product is great news, are there any competitors? The rear of the the house has 6 conventional sashes with the same problem. I love sash windows, they are handsome and effective, there must be a plethora of folk with period property who want the best of both worlds...

Guest User
Thu, 19/03/2009 - 07:41

The Slimlite glazing system is a franchise operated by Fountainbridge Glass in Edinburgh & Sashglass in Deal, Kent.

The system does allow the use of a 12mm thick double glazed unit although it is unlikely that you would be able to glaze directly into an existing single-glazed sash (the rebates are probably not deep enough and the sash would probably be too flimsy to take the additional weight of the units)

Slimlite units are horrendously expensive and there is uncertainty as to whether these units can meet the current building regulations with regard to U-values.

We have manufactured new windows using this system and it does look good - the downside is the cost, it is a very labour intensive way of manufacturing windows and this is reflected in the cost.

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