Our Approach

You’ve decided that secondary glazing is right for you. That’s great, but what comes next?

1. Fill in our enquiry form

We’ll ask you a few questions about your property and your existing windows. If you have any photos, you can upload them to the enquiry form to help us tailor our recommendations to your home.

2. We'll come and visit you

If we think we need to come and take a closer look—or if you’d like us to—we’ll visit your property to get a better feel for the project. We may be based in Chesterfield, but we’ll travel the length and breadth of the country—from Berwick to Basingstoke. The main purpose of this visit is to understand what you’re trying to achieve by having secondary glazing installed in your home, to answer any questions you might have, and to then leave you to make a decision in your own space and time.

3. We'll send a quotation

Once we’re confident we fully understand what it is you need, we’ll send over a detailed quote for the project. This document should give you all the information you need to make a decision. If you’re still feeling unsure, give us a call to chat things through.

4. Give us the go ahead

Take your time to read through your quote, then let us know when you’re ready to get started. We’ll send over the paperwork for us all to sign (including your customer rights protection and Ts & Cs) and we’ll get a technical survey date booked in.

5. We'll conduct a technical survey

Our Technical Surveyors are key members of our team who understands the design, manufacture and installation process inside-out. When they come to survey your existing windows, they’ll take accurate measurements and manufacturing dimensions, measuring carefully between plumbs and levels so your new glazing fits snugly into the aperture.

6. We'll install your secondary glazing

After your technical survey, we’ll get in touch to arrange a installation date that’s convenient for you. It normally takes between 4 and 6 weeks from quote to installation, and we’ll do our very best to fit the installation date around your schedule. With over 30 years of installation experience, we understand the nuances of fitting secondary glazing and have truly perfected our technique. Our Installation Technicians are not only masters of their craft, but are also reliable and considerate in your home.

7. We'll keep your windows working

We carry out regular inspections and offer a free health check a year after installation to make sure you’re getting the most out of your secondary glazing. The health check includes full cleaning and lubrication of the glazing to keep it in tip-top condition. We’ll also show you how to do this yourself so you can get the full benefits of your glazing for years to come.

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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