Combine traditional joinery with modern glass
23rd of June, 2025
Bringing the Best of Both Worlds: Traditional Sash & Case Windows with Modern Double Glazing
There’s something undeniably charming about traditional sash and case windows. They’re a defining feature of Georgian and Victorian architecture, adding elegance and authenticity to period homes and listed buildings across the UK. But while their aesthetic is timeless, original single-glazed sash windows often fall short when it comes to insulation, efficiency, and comfort.
Today, skilled joiners are bridging that gap — crafting traditional timber sash and case windows that honour heritage designs while incorporating modern double-glazed units for contemporary performance.
The Art of Traditional Sash & Case Window Manufacture
Crafting traditional sash and case windows is a highly skilled process. Each window is bespoke, made from durable timbers like Accoya or oak, and built to match original profiles and mouldings. From the mortise and tenon joints to the delicate glazing bars and pulleys, attention to detail is everything.
The result? A window that is historically accurate, visually stunning, and built to last — ideal for conservation areas, listed properties, or any homeowner who values architectural integrity.
The Modern Upgrade: Double-Glazed Units
Traditionally, sash windows used single glazing — charming but inefficient. Today, we can incorporate slimline double-glazed units that mimic the look of original glazing while vastly improving energy performance.
Here’s what makes modern double glazing a game-changer:
1. Improved Thermal Efficiency
Double-glazed sash windows dramatically reduce heat loss, helping keep homes warmer in winter and cooler in summer. That means lower energy bills and a more comfortable living environment — without sacrificing period charm.
2. Reduced Noise Pollution
For homes on busy streets or in urban areas, double glazing offers excellent sound insulation, creating a quieter, more peaceful interior.
3. Condensation Control
Modern glazing helps reduce condensation on the inside of windows, protecting timber frames and improving indoor air quality.
4. Security Boost
Double-glazed units are stronger and harder to break, offering better security than single-glazed panes.
5. Low Visual Impact
With advances in glazing technology, modern units can be made with slim sightlines, restoration glass, and warm-edge spacers that preserve the appearance of traditional glazing — even under scrutiny from planning officers.
A Seamless Blend of Tradition and Technology
At the heart of this approach is the desire to respect the past while embracing the future. Traditional sash and case windows with modern double-glazing combine classic craftsmanship with cutting-edge performance — ensuring beauty, efficiency, and longevity for decades to come.
Whether you're renovating a period home or upgrading original windows, this blend of old and new delivers the best of both worlds.