Special offer
£500 off your first installation.
Every installation backed by a ten-year written guarantee. Give us a call and we'll walk you through exactly what's included, check your home qualifies, and follow up with an itemised written quote.
What the offer is.
- 01
£500 off your first installation of £5,000 or more — windows, doors, conservatories, porches or secondary glazing.
- 02
Valid for home visits booked in 2026.
- 03
Applied directly to your written quote — no vouchers, no codes.
Two reassurances.
Ten-year guarantee.
In writing, on Dukes Windows headed paper, signed and honoured by us — not a third-party insurer.
Founded to do this properly.
Co-founded to do windows honestly — with a ten-year written guarantee.
Questions about the £500 offer?
Give us a call and we'll talk it through — no call centre, no hard sell. Prefer we come to you? Book a home visit and we'll bring the detail to your house.