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15–25-year guarantee on vacuum glazing
A failed unit gets new glass free of charge
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20-year guarantee on timber repairs
Repairs in Accoya and Tricoya timber
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1,000+ homes restored since 2008
East Anglia, London and the Home Counties
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Rated 5.0 on Google
Old sash window double glazing Hitchin
Swap high heating bills and draughts for a constant, warm and draught-free home with the revolutionary new Fineo double glazing vacuum sealed glass.
At only 6.7mm thick, Fineo is perfectly proportioned for retrofitting this double glazing glass into the narrow rebates of old sash windows. With this service, you can upgrade your home and lower your heating bills and reduce outside noise without changing the appearance of one of the finest features of your house, this is especially important if you living in a Grade 2 listed property with old, inefficient wooden windows.
If you are thinking of replacing inefficient single glazing with double glazing, Fineo slim vacuum glazed glass makes it possible now.
This new type of vacuum glazing retrofitted into existing timber frames will bring historic windows into the 21st century without any alterations.
If your windows need any repair then we can replace soft or rotten sections with Accoya wood, uniquely weather-proof and rot-resistant. For sash window double glazing in Hitchin contact Chameleon, official Fineo glass installer and specialist in historic window renovators, today.

Services list
Full range of sash window refurbishment services in Hitchin and Hertfordshire.
We don’t do sash inserts – we reuse your old sashes
We can make invisible adjustments to help the glass fit and because it is so light, it won’t disturb the delicate balance of the weights and pulleys. Install double glazing to the sash windows of your
Hitchin property without altering or spoiling this classic architectural feature.


Testimonials from satisfied customers
Testimonial — Trevor and Dee
Testimonial – Sally
We do not just replacing glass, we go extra mile
If your window frames require any repair or sashes are stuck or blocked. We can help by replacing rotten timber sections of the window frame with Accoya wood. Accoya is uniquely weather-proof and rot-resistant timber. By laminating your existing timber frames with Tricoya, we will weatherproof the frames for many years to come.
Our double glazing projects

Retrofitting original sash windows with double glazing in Suffolk
Retrofitting original sash windows with double glazing in Suffolk
Fitting double glazing to existing windows in Chelmsford
Fitting double glazing to existing windows in Chelmsford
Double glazing Georgian sash windows with FINEO glass
Double glazing Georgian sash windows with FINEO glass
Pilkington Spacia glass – Vacuum-insulated glazing retrofitting project
Pilkington Spacia glass – Vacuum-insulated glazing retrofitting projectWindow draught-proofing Hitchin
Sash window draught proofing in Hitchin is one of the services we provide alongside sash window double glazing and refurbishment. This services can reduce draughts by more than half, insulating your property and increasing your energy rating, important when you come to sell.

Double glazing enquiries
Sash windows double glazing in Hitchin






