We use cookies to improve our website and your experience when using it. To find out more about cookies or how to delete them see our Privacy Policy
 To accept cookies from this site and to dismiss this message click > Agree
insulation sound proofing draught proofing stop condensation
ExtraGlaze contact details
Instant quote
Extraglaze Explained
Measuring Guidelines
learn more
order free sample
  • 15 hours ago
    ratings 5
    Perfect secondary glazing
    Perfect product for old single glazed windows. It does protect from cold air, condensation and overall bad feelings what bad windows give you. Easy to install DIY. Thank you for great support from Extraglaze.
    Product : Perfect material for easy installation. Blocks out cold perfectly.
    Balint Laszlo
  • 2 weeks ago
    ratings 5
    Great service
    Just received my second order of Extraglaze panels and am delighted with the quality and service which is second to none.
    Product : I own a listed building so I needed a sympathetic solution to heat loss and noise reduction from cars etc. The product is a joy to fit and it really...
    Read more...
    David Wilkinson
  • 3 weeks ago
    ratings 5
    Pro firm
    Very good customer service, I was impressed with the way they handled my various problems over the course of a large and challenging job; a professional outfit.
    Product : A very good product, simple but effective
    Mark Cass, Hove
  • 1 month ago
    ratings 5
    Excellent customer service and a great product.
    Graham Hibberd
  • 1 month ago
    ratings 5
    Brilliant communications, both telephone and online. Ordering our secondary glazing was so easy. Printed and online measuring instructions were simple to follow. Everything arrived well packaged and cut and assembled to perfect size.
    Installation was quick and simple. Looks a treat. Read more...
    Dallow

Extreme Adhesive Test

 

thumbnail

We wanted to prove to ourselves our adhesive is as good as if not the best!

Proven to improve

 

coventry university logo bre logo

 

The Building Research Establishment and Coventry University complete tests of the Extraglaze system
Soundproofing and thermal test results...

Read more...

Recommended for Listed Buildings

 

Telford and Wrekin Conservation Department encourage the use of secondary glazing, where possible, to increase thermal efficiency.

Read more...
 

Proven to improve

 

Extraglaze tested at Coventry University and at the Building Research Establishment

  coventry university logo



Coventry University – Thermal insulation tests

In April 2014 we received confirmation that Extraglaze is a scientifically proven thermal insulation solution that beats a typical aluminium framed alternative.
outside chamber sm

Outside the University's Environmental Chamber.
 
Below - Extraglaze put to the test in the Environmental Chamber

inside chamber sm

The university's Sustainable Buildings Future project used their Environmental Chamber to compare Extraglaze with an aluminium-framed, glass-pane secondary glazing system...
...Extraglaze came out the clear leader.

arrowpichigh tinyWith both systems tested on a single glazed sash window the U-value for Extraglazeproved 11% better (2.28W/m²) than the alternative product.

arrowpichigh tinyWe already knew that Extraglaze would be a better solution to deal with condensation, and the tests confirmed it. In a humid room test (60%RH), with below zero temperatures outside (-5 and -10ºC) Extraglaze was an impressive 78% better.

bre logo BRE – Sound insulation tests
In July 2013 a large timber framed window (1.3m² of visible glass) was installed in the Building Research Establishment's (BRE) Horizontal Transmission Suite, and tested against an aluminium framed glass secondary glazing system. A wide range of tests were made, to see how secondary glazing could not only improve a single glazed window but even a double glazed window.
b9 acoustic lab sm

Extraglaze put to the test in the Horizontal Transmission Suite
inside b9 sm

To summarise the results both systems were rated "good" as a sound insulator for noise problems. We learned in particular that smaller panels do best, being more rigid, and the larger the gap, between the original window glass and the Extraglaze, the better. What surprised us most was that it didn't seem to make much difference whether the original window was double glazed or single glazed.

Proof in practice
In January 2014 Extraglaze was installed onto brand new triple glazed UPVC bay windows in a home by a main road. The triple glazing had been installed to cut the road noise but had proven ineffective. However, with the addition of Extraglaze road noise was almost completely eliminated.
extraglaze soundproofing

And news from customers...

We have an ever increasing number of fabulous testimonies from our customers, which can be seen in the many reviews they have left on Feefo. It is clear that our customers enjoy their homes much more now than they did before Extraglaze was installed, being much warmer and much quieter.

For more information about Extraglaze please view the information in this site or contact us on the number above.

If you are an engineer or architect please contact us to discuss the results of tests in more detail.

 

Help & Guides

measuring icon

 

How to stop condensation

 

A typical installation
 
For sash windows
 
For casement windows
 
Easy Open System
 

 

guildomc

 
cards
poweredByWorldPay