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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
  • 4 days ago
    ratings 5
    Product delivered on time and to exact measurements. They look so good you hardly see them
    Paul Robinson, West Sussex
  • 4 days ago
    ratings 5
    Great product
    Personal service- great product
    Product : Once we got to grips with all instructions and guidance our panels were easy to install
  • 5 days ago
    ratings 4
    Beautiful glazing, well packaged. Only problem was poor communication about the delivery.
    Product : Great glazing. Affordable and convenient.
    Thank you for your very positive feedback. On the communications side of things, there was a “quiet” two weeks while we prepared your order. At this time of year our workshop is at its busiest dealing with a rush of orders. Despite this I am happy we got your panels to you within 12 working days, and...
  • 6 days ago
    ratings 5
    Great product
    First class service, quick delivery, great product
    Product : Good quality and well-constructed
    Malcolm Nelson
  • 2 weeks ago
    ratings 5
    Prompt delivery, excellent packaging and very clear instructions.
    Product : Brilliant, effective double glazing, almost invisible, easy to install.
    Imogen Mason

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:   DIY (Made To Order panels)
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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Total price (excluding delivery) : £0.00


Help & Guides

measuring icon


How to stop condensation


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