Increased Security

Feel safer and rest assured your home is protected

Feel more secure

Peace of mind

Perfect for listed buildings

Windows are often seen as the weak point in building security. Typically, single glazed windows in areas that are not visible by neighbours such as basements or ground floor, side and back of property are all particularly vulnerable to potential attack. Secondary glazing offers an affordable, discreet, highly effective solution to help counter this problem.

Enhanced home security

Most window frames—even double glazed—offer little resistance to forced entry. Standard building glass will readily shatter when subjected to force from either inside or outside. Purpose made secondary windows installed independently to the inside of the existing window frame can provide enhanced home security, whether to a single vulnerable window or to a complete building.


An extra layer of security

Secondary windows are, by the nature of their design, extremely difficult to open from the outside. Once they are fitted with they become a huge challenge to even the most determined intruder. Given enough time any window can be broken through but the time it takes and the noise it will make means that the potential burglar will go elsewhere and look for easier pickings.


Peace of mind

Additional security for your property will give you the peace of mind that you’re doing everything possible to protect your home. Feel comfortable in your own home – be safe – be secure.

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Fixed Windows

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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