Upgrade Your Home To Double Glazing Before Winter Hits
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How Retrofitting with Thermoglaz Works
Thermoglaz has been helping homeowners in Canterbury improve their home’s comfort by installing modern glazing into their existing window frames for over 20 years. This has allowed Cantabrians to keep their old character window frames, while reducing energy transfer through their windows by up to ~83% and blocking ~80% of harmful UV rays entering their home.
Retrofit Timber Frames
Retrofit Timber Frames
A pioneering, reliable and simple process of removing your existing single glazed panes from your timber windows and doors, then installing new high performance thermally insulated double-glazed glass into your existing frames.
Retrofit Aluminium Frames
Retrofit Aluminium Frames
We can install Thermoglazed units into any existing aluminium frame of any size or shape of door or window, and with any finish. We provide you the most professional and reliable system available on the market we guarantee it stands the test of time.


