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insulation sound proofing draught proofing stop condensation
ExtraGlaze contact details
Instant quote
Extraglaze Explained
Measuring Guidelines
Solutions for listed buildings
order free sample
  • 6 days ago
    ratings 5
    Cannot recommend highly enough - superb service and standard
    First class - I made a mistake on my measuring and Nic and his team could not have been more accommodating. Glazing is now in place and looks superb. The white border on both glazing and inner magnet (ensuring it still looks discreet in summer when the glazing is removed) is very good...
    Sarah L
  • 3 weeks ago
    ratings 5
    A great find. Lovely product.
    Great communication. Really good product. 2 weeks delivery.
    Product : We fitted one window first to see how they were. Reasonable simple to install for 70 year olds. Brilliant product which looked amazing and prevented the condensation (mostly) straight away. there is still some...
    This condensation is a good sign, that the wooden frames are drying out - moisture is perspiring from it! This is a great result for your precious window frames. You can take the panels off to wipe down the windows (while the moisture is condensed on the outside glass), but don't do this early in the...
  • 4 weeks ago
    ratings 5
    Excellent product.
    Very helpful on the phone. 2 week turnaround. Really good product.
    Product : We have fitted 8 windows so far. They look amazing, almost invisible. Condensation immediately disappeared on 5 windows with just a small amount on the other 3. I think this is due to damp windows which...
    tessa abrams
  • 1 month ago
    ratings 5
    Perfect fit
    Everything arrived as ordered. Fitted easily and looks nice
    Product : Now have 2nd and 3rd window done. Very happy.
  • 2 months ago
    ratings 5
    Narrowboat Aslan
    Ease of ordering, telephone assistance where required and prompt delivery

Extreme Adhesive Test



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...


Recommended for Listed Buildings


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

  • Click "Calculate" to record each window project. However, to see them again in future visits, please register or sign in.

Project form


Our ready to fit secondary glazing panels are easy to install.

Getting the measurements spot on is crucial and for this we have a measuring guide complete with lots of illustrations, plus we are always on hand via telephone, email, FaceTime or Skype to offer further help. Once you have placed an order we will also supply an easy to follow installation guide.

measuring icon


Step 1 - Download our easy to follow measuring guide >>>


Step 2 - Enter your required sizes into the forms below


Step 3 - Order your Extraglaze panels online


Delivery is normally around two weeks but will depend on the quantity and complexity of your order



If you haven't already done so, get a free sample and select a magnet and panel edge colour to best match your window paint or wood texture. Our standard is satin white wood grain texture.


Start here...


This form will estimate the total cost to have Extraglaze installed by one of our fitters. It assumes your windows are in good condition and that Extraglaze can be fitted without us having to carry out any remedial work to them. If the estimate is acceptable then you may order a survey. This will identify any additional works or material required. A new price will then be calculated and presented to you by the surveyor, as a fixed price quotation.


Measuring for an estimate

Please take measurements across the entire glazed area. Any measurement plus or minus 25mm is not likely to affect the estimated price, so you don't have to be extremely accurate at this point. Our surveyor will do the final, precise measurements.



DIY (Made To Order panels) Fitted by us (estimate) Type:   Fitted by us (estimate)
Project name:  
Post code:  
Window 1
Name :
Window type :
Width (mm) :

Height (mm) :
Area (sqm) :

Hinged upper panel :
Covered by :

Panel 1

Area (sqm) :

Large panel
This size panel requires 20mm magnets on all edges. Tooltip
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Estimated total : £0.00
Payable now (survey fee) : £0.00
A local fitter could save you £'s

We can reduce the cost of this project (travel costs and time) by training a local joiner or similar tradesperson for you. If you know someone, and can vouch for their reputation, please ask him/her to contact us. We will provide reliable support, and consequently we could re-price this project to save you a considerable amount of money.

Get a FREE remote survey -  Find out more ...


Help & Guides

measuring icon


How to stop condensation


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