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We specialise in the repair, restoration, and replacement of traditional timber sash windows across Islington. Our master joiners blend traditional craftsmanship with modern techniques to preserve your home's character and improve thermal efficiency.
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Golden Ratio Joinery Ltd provides expert Sash Window Restorations for Georgian and Victorian homes across Islington (N1, N5 & N7).
The original sash windows in an Islington townhouse are among its most valuable features — beautifully proportioned, made from slow-grown period timber and often glazed with delicate old glass. Restoring rather than replacing them keeps that heritage intact while giving you windows that work beautifully again. As your local N7-based specialists, it is the service we are asked for most across the borough.
The Georgian and Victorian homes of Canonbury, Barnsbury and Highbury were built to last, and with the right care their windows have decades of life left. A full restoration typically involves:
Years of overpaint are stripped to reveal crisp original mouldings and free the sashes to move again.
Decayed sections are spliced out and replaced with matching timber; loose joints are re-wedged and consolidated.
Re-corded, re-balanced and draught-proofed, your windows open with one finger and close without a rattle.
We re-putty, keep original glass where possible, and repaint in a long-life microporous coating in your chosen colour.
With Islington among London's most conservation-protected boroughs, restoration is the approach the council prefers and the one that best protects your home's value. For genuine year-round comfort we can retrofit slimline double glazing into the restored sashes without altering their appearance. Should a window be too far gone we build an exact replacement, and for minor issues a quick repair is often enough.
Book a free, no-obligation site survey with our FENSA-registered joiners. We will assess your windows, explain your options honestly, and give you a transparent written quote. Call 020 3488 1695 or request a callback today.
We also provide expert sash window restoration across these neighbouring London areas:
A selection of recent sash window repairs, restorations and installations completed for homeowners across Islington and North London.
Finsbury Park
"Saved our original Victorian windows when others said replace. Beautiful workmanship — our sash windows look brand new."
Stoke Newington
"Draughts completely gone. Warm house for the first time in years. Fair price and they clearly know period properties inside out."
Central London
"They completely replaced two windows in our Edwardian home. Friendly, communicative and done quickly — in just 2 days."
North London
"The detailing is very well done and accentuates the property nicely. The whole front of the house looks much better as a result."
Queens Park
"The window is perfect. I couldn't be happier."
Yes. We regularly carry out sash window repair and restoration services in Islington and all surrounding boroughs. We offer free site surveys for all local residents.
Yes, absolutely. We specialise in retrofitting slimline double-glazed units into original timber sash windows. This means you don't have to rip out the entire window box, saving money and preserving the historical character of your property.
Costs vary depending on the extent of the damage (e.g., rotten sills vs simple broken cords). However, repairing is almost always significantly cheaper than a full replacement. We provide completely transparent, itemised quotes after a free survey.
Stop the draughts and start saving on energy bills. We offer a free, no-obligation survey and quote for all window upgrades across London.
218 Hornsey Road, London, N7 7LL
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