Double glaze your existing aluminum windows and doors

Enjoy the benefits of a warmer, drier, quieter and healthier home for less. 

A pioneering retrofit double glazing system available for aluminium windows and doors.

The more single glazed glass area you have, the higher your energy loss.

Thermoglaz has pioneered the development of specialist extrusions for double glazing aluminium windows and doors, allowing homeowners improved warmth, dramatic noise reduction and substantially less condensation.

Regardless of how much glass you have, retrofit double glazing your existing aluminium windows or doors gives a cost saving of between 30 and 40% over installing new windows or doors.

  • NCost effective solution
  • NMore warmth and less draughts
  • NPainless installation process
  • NReduced condensation and dampness
  • NImproved insulation
  • NLower cost energy bills
  • NUV protection for furnishings and interior decor
  • NReduced noise for a quieter home

Book a FREE Quote

The Thermoglaz installation process is designed to be totally painless with minimal interruption to you, and with over 30 years experience in the glazing industry, you know you’re in safe hands.

“Fantastic to deal with. Great service from start to finish. Would highly recommend them to anyone. Thanks team.”

Kathryn Fraser

“Thermoglaz was recommended to us for our double glaze refit. We are very pleased we went with the recommendation.
The team at Thermoglaze are the total professionals, no hard sell, great advice, excellent team of installers and the most amazing after install service.”

Bob Cross

“The team at Thermoglaz were are real pleasure to deal with and we are so happy with the results. They did a wonderful job retrofitting our double glazing and I was pleasantly surprised at how little it cost. I would highly recommend them.”


“We recently had our house retrofitted with double glazing into our original wooden frames. What a difference it has made. The team were amazing. All of our windows have colonial bars, they did a fantastic job installing the new bars. Amazing workmanship to keep the look just right.”

John Ross

“Have now had two houses double glazed with Thermoglaz. The service is prompt and friendly. The workmanship is to a high standard and they cleaned up so well you wouldn’t know that had been.. apart from how much difference the double glazing made! Thanks guys!”

Steven Parratt

“Great company to work with. Excellent experience from the sales all the way to delivery. Very friendly, professional and prompt service. Could not fault them.”

Chris Lee

“Love our double glazing. A great company to deal with”

Cathy Hodgins

Get in touch

for your FREE quote today

Visit our showroom

20 Kennaway Road
Woolston, Christchurch
Monday to Friday
8:00 am to 5:00 pm
Weekends by Appointment