The window on the left has had the sash box fully refurbished and new double glazed draft proofed sashes installed. It meets current 2011 building regulations, is registered with FENSA, was approved by the local conservation officer and comes with a 5 year insurance backed warranty.
To achieve this result has not been easy. Georgian bar Sash windows are notoriously difficult to double glaze sympathetically. Most conservation officers are well aware of this and often insist that windows remain single glazed. The main problem is the width of the glazing bar, this can be as narrow as 16mm but more typically it is in the 19-28mm range. It’s all the Georgians needed – as there was no spacer bar to conceal, then a circa 6mm glazing rebate would suffice.
Achieving the look of single glazing with double glazed sashes requires care. It is essential to match all the dimensions of the original sash exactly, including the glazing bar and as can be seen on the final picture, where our double glazed Georgian sashes are adjacent to a property with the original single glazed windows, it is exceptionally hard to tell which one has been double glazed.
So how do we achieve this result? Well if you’d like to find out our secrets learn how you can double glaze your Georgian sliding box sashes without compromising your period look, then give us a call and we can come out and do a free survey on your property.