Protect and preserve your original Victorian sash windows while dramatically improving thermal performance and reducing noise. Our bespoke secondary glazing complements period features, not conceals them.
Victorian properties, built between 1837 and 1901, feature some of the most beautiful windows ever designed. The tall, elegant sash windows with their slender glazing bars and handmade glass are architectural treasures that define the character of London's residential streets. Many are protected under listed building or conservation area regulations.
However, these single-glazed windows were designed in an era before central heating, when coal fires provided warmth. Today, they can account for up to 40% of a home's heat loss, leading to high energy bills and uncomfortable living spaces. Secondary glazing provides the solution without sacrificing the beauty of original windows.
The classic mid-Victorian design with two panes in each sash, typically found in terraced houses from the 1860s-1880s.
Earlier Victorian style retaining Georgian influence, common in 1840s-1860s properties.
The iconic Victorian bay, from simple canted designs to elaborate curved bays in grander properties.
Decorative arched heads and fanlights common in hallways and above entrance doors.
The air gap between windows creates effective thermal insulation, dramatically reducing heating costs.
Acoustic glass options are ideal for Victorian terraces on busy London roads.
Add a second barrier with laminated glass for improved protection against intruders.
We understand that Victorian windows are often the most valuable original feature of a period home. Our secondary glazing is designed to be as unobtrusive as possible, with slim aluminium frames that can be powder-coated to match your existing woodwork or painted white for a classic look.
For properties with particularly fine original glazing, including crown glass or restoration glass, secondary glazing protects these irreplaceable windows from damage while eliminating draughts and condensation.
The installation is fully reversible, meaning your original windows can be accessed for maintenance, cleaning, or future restoration work without any permanent alterations - essential for listed buildings.
London has more Victorian housing than any other city in the world, and we have worked on properties across the capital. From the grand villas of Hampstead to the classic terraces of Islington, Hackney, and Clapham, our team has extensive experience with every type of Victorian window.
Yes, our bespoke secondary glazing is designed to complement Victorian window features including box sash mechanisms, decorative glazing bars, and period proportions while remaining virtually invisible from inside.
No, secondary glazing is fitted internally behind your existing windows without any modification to the original sashes. The installation is fully reversible and preserves all period features.