We wanted to prove our adhesive is the best!
The Building Research Establishment and Coventry University complete tests of the Extraglaze system
Soundproofing and thermal test results...
Telford and Wrekin Conservation Department encourage the use of secondary glazing, where possible, to increase thermal efficiency.Read more...
Extraglaze is the only scientifically proven lightweight acrylic & magnetic secondary glazing system, specifically developed for historic single glazed windows, to soundproof, thermally insulate and beat condensation effectively.
Extraglaze achieves this with the absolute minimum change to the appearance of any windows. Our customers remark that it is almost invisible, once installed.
Reduce heat loss by up to 60%
Greatly reduce outside noise
Lower energy bills
Beat draughts & condensation
Minimal visual impact
Light weight and easy to handle
No damage to existing windows
Made to exactly fit your existing windows
Conservation consent not required*
|Fully assembled panels: just unpack & fit|
|Superior packaging = safe delivery every time|
|All panels labelled for identification|
|Panel edge colours match your windows|
|Scientifically proven in independent tests|
|Extra high bond adhesive|
|Frame magnets also match your windows|
|Maintenance free magnets|
|Continually being developed and improved|
|Fitted by us option|
|Benefits to consider...||Extraglaze||Sliding aluminium|
|Condensation||Very low||** Serious|
|Thermal insulation||11% better U-value than aluminium|
|Product thickness||8.2mm||Typically 40mm|
|Change to your window's appearance||Almost none||A bulky glazed unit|
|Sound proofing||*** ---- Comparable ----|
**In tests conducted for us at Coventry University, Extraglaze suffered 78% less condensation than the aluminium framed glass secondary glazing, when fitted to a sash window, with high humidity 'indoors' and temperatures of between -5 and -10 centigrade 'outdoors'.
***In tests conducted for us at the Building Research Establishment, we compared Extraglaze against an aluminium system stiffened by sliding framework running down the centre of the window. This stiffness gave it a slight advantage. Whereas the Extraglaze had no stiffeners, and looked much better for it. Had we stiffened it we believe they would have been more comparable.
**** Only genuine Extraglaze panels were used in these tests. No other magnetic systems were proven.
We can expertly install for you or supply fully assembled panels for you to fit with our full guidance. Order your free sample pack here.
Extraglaze is the ideal secondary glazing solution for Listed Buildings and for those in Conservation Areas and are particularly suitable for buildings of historic significance. Planning Permission or Listed Building Consent will almost certainly not be required from your local authority. "most authorities encourage the fitting of secondary glazing to increase the thermal efficiency of period windows."
*To check with your local planning department, click here and enter your postcode.
We provide a complete Supply and Fit service, from the initial survey right through to fitting and after sales care. You can get an initial estimate online here without the need for our surveyors to call. If you are happy with your estimate you can book a comprehensive survey and follow up quote online too.
We are working towards installing nationally but at present there is no surplus charge within a 50 mile radius of our Shrewsbury base or one of our national installers. If you are beyond that distance, we will ask a fair and reasonable charge for travel time and fuel.
Please send us your own measurements in the first instance to obtain an initial estimate. If you feel totally confident in measuring and installing for yourself then please use our Estimate or Buy Online pages to place your order.
We supply DIY secondary glazing panels ready to install. These are not kits, they are made to measure, fully assembled and ready to apply. In many cases all you need to do is open the box and fit the panels to your windows. We will supply a comprehensive set of fitting instructions and are available to offer help via our helpline phone number or via Skype or Facetime. Download our measuring guide here and then enter your measurements into our online estimator where you can also place an order.
To make an enquiry please use the Contact Us page
Extraglaze is both a supplier and installer of specialist secondary glazing services, with a rapidly expanding network of trained fitters. Our customers include home owners, offices, schools, even holiday resorts with single glazed windows. We frequently install our secondary glazing in listed buildings and conservation areas. Extraglaze will even turn double glazing into triple glazing, and stop condensation. And if you live in a noisy city or town centre, it will bring you the sound insulation you never imagined possible, even as you watch the traffic pass by! We insulate sash windows and insulate casement windows. We supply and fit magnetic secondary glazing for sash windows and casement windows, even stained glass windows. If you require energy saving windows then insulating sash windows is a great alternative to window replacement or window renovation. The low cost of secondary double glazing is affordable compared to replacement sash windows & replacement casement windows. Extraglaze offers window thermal insulation and sound insulation for existing windows including stained glass windows. Both double glazed sash windows and triple glazed sash windows are possible. Extraglaze can turn draughty old windows into energy efficient windows.