Secondary glazing you can rely on
Design | Manufacture | Install
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Thermal Insulation
Reduce heat loss, draughts and save on your energy bills
Noise Reduction
Block out external noise and get a good nights sleep
Increased Security
Add an extra layer of security to your home
Reduce Condensation
Enjoy a cleaner, drier and a more comfortable home
What is secondary glazing?
Secondary glazing is an additional, discreet internal window that works alongside an existing single, double or triple glazed window. It’s cost-effective, efficient and provides a number of performance based benefits to homes and commercial buildings. It’s most common use is for Listed Buildings and conservation areas.
Why should you fit secondary glazing?
Whether the problem you currently face is heat loss, draughts or too much noise from your existing windows, it is the best possible solution to make your home more comfortable and reduce your heating costs.
Our expert installers will ensure that their many years of experience are used to fit the units effectively, correctly, quickly and with minimal disruption.
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Hinged Casement
Fixed Windows
Lift Out Windows
Bespoke Windows
Installing secondary glazing can reduce heat loss by up to 60-70%
Find Out MoreWhat Our Customers Say
A pleasure to deal with a very friendly and knowledgeable man. Very refreshing to meet somebody who really understands the product he is selling and able to offer genuine advice.
Many thanks for completing the secondary glazing to my front bedroom. The difference in sound reduction is better then I expected and the room is now a lot warmer too.
All your colleagues have been very helpful. The project has all been arranged and executed so promptly. What a contrast to other secondary glazing suppliers I have come across!
Black Knight Secondary Glazing Limited
Registered in England and Wales Number: 08638414
VAT Registration Number: 197 3861 56
Head Office
Unit 9, Prospect House, Colliery Close, Chesterfield, Derbyshire, S43 3QE
Office Tel
01246 229 000
Freephone
0808 168 5208