Period-appropriate secondary glazing for Georgian properties. We understand the architectural significance of Georgian windows and provide solutions that respect their elegant proportions while improving thermal efficiency and noise reduction.
Georgian architecture (1714-1830) is defined by its symmetry, proportion, and classical elegance. The windows of this era, typically featuring six-over-six or twelve-over-twelve pane configurations, are central to the Georgian aesthetic. Their multiple glazing bars and slender timber frames create the distinctive appearance that makes Georgian properties so desirable, especially those in conservation areas or with listed building status.
These windows often feature crown glass or early cylinder glass, with their characteristic slight imperfections and beautiful light quality. Replacing such windows with modern alternatives would be an architectural tragedy, which is why secondary glazing offers the ideal solution for improving performance without compromise.
The classic Georgian configuration with six panes in each sash, creating twelve panes in total. Common in townhouses from 1720-1780.
Earlier Georgian style with smaller panes, reflecting the technical limitations of early glass manufacturing.
Later Georgian/Regency style (1811-1820) with larger panes as glass technology improved, often two-over-two or three-over-three.
The principal floor (piano nobile) features taller windows, often with decorative surrounds and pediments.
Our approach to Georgian properties is guided by respect for the original architecture. We use the slimmest possible frame profiles to maintain sightlines, and our vertical sliding secondary glazing replicates the operation of traditional sash windows.
For properties with particularly important interiors, we can also provide secondary glazing with dummy glazing bars that align with the original window divisions, creating an almost invisible installation when viewed from inside the room - perfect for Grade I and II listed properties.
Frame profiles as narrow as 20mm to minimise visual intrusion.
Preserve irreplaceable crown glass and early cylinder glass.
London has some of the finest Georgian architecture in the world, and we have extensive experience working in these prestigious areas:
Georgian windows often have deep timber box frames which provide an ideal cavity for secondary glazing. The greater the air gap between the original window and secondary glazing, the better the thermal and acoustic performance. With Georgian windows, we can typically achieve gaps of 100-150mm, providing exceptional insulation.
The substantial timber reveals also allow for neat installation with the secondary glazing frames hidden within the window opening, further reducing visual impact from inside the room. This is also ideal for later Victorian and Edwardian properties.
Yes, our slim-profile secondary glazing is specifically designed to work with Georgian six-over-six, nine-over-nine, and twelve-over-twelve pane configurations without obscuring the elegant glazing bar patterns.
Absolutely. Secondary glazing is the preferred solution for Georgian listed buildings as it preserves original windows completely and is fully reversible. We handle Listed Building Consent applications where required.