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Security Benefits



Our Price Promise

We will match any genuine quotation, and promise to save you at least 5%* off your total cost.


Windows are the eyes of a building and one of the elements most vulnerable to attack whether from forced entry, accidents and prolonged weathering.

Most window frames offer little resistance to forced entry, and standard building glass will readily shatter when subjected to external and internal forces.

Secure Secondary Glazing

Purpose made secondary windows installed independently to the inside of the existing window frame can provide enhanced protection, whether to a single vulnerable window or to a complete building. Protection is available from simple low level deterrence to significant resistance against a determined attack.

Secondary Security Windows Are Unobtrusive

Secondary windows are designed to complement the external window style, are discrete to avoid drawing attention to the protection offered and can usually be installed with little disturbance to the fabric of the building or to the occupants within.

Security Benefits

How to find out more?

Book an appointment with us

Book an appointment

One of our friendly and knowledgeable glazing technicians will arrange a free, no obligation consultation at your home, at your nearest convenience.

Contact our freephone number 0808 168 5208

Phone Black Knight Secondary Glazing Ltd

For further advice or any additional information on our secondary glazing, contact our team of experts who are on hand to answer any questions you may have.

Send us your enquiry

Contact Black Knight Secondary Glazing Ltd

Simply send us your enquiry using the form to the right and one of our surveyors will respond quickly to action your request.

Request a Free Estimate

Request a brochure

Please feel free to provide us with your approximate window sizes and designs and we will provide you with a quick estimate.

Send Us A Quick Enquiry


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Contact Black Knight Secondary Glazing Ltd Today For A Free No Obligation Quotation, Freephone 0808 168 5208

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