Our Products

Secondary Glazing products to suit all property types and window styles

Whether you are considering secondary double glazing windows for thermal insulation or for noise reduction you can be reassured that our quality products have been fitted in hundred’s of properties throughout the UK.

Why do so many people trust us to meet their internal double glazing needs? Because it gives great noise insulation, reduces heat loss, helps to reduce condensation and improves security.

With no disruptive building work needed and no redecoration it is the ideal product for retaining the character of your property.

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Hinged Casement

Fixed Windows

Lift Out Windows

Bespoke Windows

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


0808 168 5208