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Black Knight Secondary Glazing Ltd

Double glazing company in Chesterfield
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Black Knight Secondary Glazing Ltd One of the UK's leading suppliers and installers of secondary glazing.
Nationwide coverage in mainland UK.
Bespoke secondary glazing - we can fully install or deliver to you for DIY fitting.
We give friendly, informed advice to help you make the right decision.
Fit secondary glazing to stop draughts, reduce heat loss and combat noise effectively.
PRICE MATCH PROMISE - always giving the best value.

We promise to always advise you honestly about the potential solutions to your current heat loss, noise and security issues so that you can arrive at an informed decision in your own time.

We promise to always treat your home and possessions as we would treat our own, and ensure that we protect them carefully while we are carrying out the work.

We promise that we will never use any form of pressure selling.

All our secondary glazing products have been independently tested by UKAS and is the most effective system available in the UK today.

Black Knight - large enough to cope; small enough to care.
Served areas
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Highlights and features
  • Price Match Guarantee - we will match any genuine, written quotation for comparable product
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Services
Secondary Glazing Balanced Vertical Slider
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The Black Knight balanced vertical slider has been designed to copy the sliding motion of a traditional sash window and each individual sash is supported by pre-tensioned spiral balances which allow the panels to be opened in a variety of positions.
Secondary Glazing Tilt-in Vertical Slider
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When access to an existing sash window is difficult the secondary glazing can be manufactured to include a tilt-in facility which lets the sashes be pivoted into the room for cleaning and maintenance of the existing primary window.
Secondary Glazing Horizontal Slider
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Horizontal sliders can be manufactured in combinations including 2, 3, 4 & 5 panels and each one of the individual glazed sashes can be removed to allow for easy cleaning and maintenance of the frame of the existing window.
Secondary Glazing Lift Out
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As yu would expect, lift out secondary glazing is the simplest & cheapest design in the range. They have no moving parts and so is ideal for situations where there are no opening parts of the existing window or where access for maintenance & cleaning ly is needed.
Secondary Glazing Hinged Unit
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Black Knight secondary double glazing hinged windows are an adaptable unit design that allows the greatest range of easy access to the primary window for maintenance and cleaning.
Reviews (3)
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Liam Keenan
Mar 01, 2022
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Excellent customer service, great communication and quality install. Went above and beyond - highly recommended!
Louise Thomas
Dec 22, 2021
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Had no reply for two weeks to an email that I was requested to send in a phone communication. Most disappointing. How reliable will they be?
Ali A.
Jan 06, 2021
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Amazing service from Black Knight. Graeme was excellent from getting the quote done, to explaining different options and getting the job sorted quickly and to the highest standards. The fitters were efficient and professional. Its been 6 months now and what a difference the secondary glazing has made. Blissful sleep, no more road noise and such a big difference on top of existing double glazing.