Sash Window Secondary Glazing
Specialist secondary glazing for Victorian, Georgian, and Edwardian sash windows. Preserve the character of your period property while dramatically improving thermal and acoustic performance.
Purpose-Designed for Sash Windows
Vertical Sliding
Mirrors the operation of your original sash window for familiar, easy use.
Heritage Sensitive
Designed to complement period architecture without compromising character.
Thermal Performance
Dramatically reduce heat loss through single-glazed sash windows.
Sound Insulation
Effective acoustic barrier for properties on busy streets.
Why Sash Windows Need Secondary Glazing
Original sash windows are a key feature of London's period homes. Georgian townhouses, Victorian terraces, and Edwardian villas all have these elegant windows — but the single glazing means high heat loss and poor sound insulation.
Replacing them with double glazing is often not an option. Many homes are in conservation areas or are listed buildings, where changing the outside look is restricted. And even when replacement is allowed, modern units rarely match the look of original windows.
Secondary glazing is the ideal fix. We fit a discreet inner window that boosts thermal and acoustic performance while leaving your original sash windows untouched. The system works independently, with vertical sliding panels that match how your original windows open.
Solutions for Every Sash Window Style
Our most popular service. Victorian sash windows typically feature larger panes with horns on the bottom rail. We match the sightlines to maintain visual harmony.
- Vertical sliding panels
- Slimline aluminium frames
- Optional tilt-in for cleaning
Georgian sash windows with their distinctive six-over-six or similar glazing patterns require careful consideration. Our solutions respect the original proportions.
- Unobtrusive profiles
- Heritage colour matching
- Conservation officer approved
Edwardian properties often feature sash windows with decorative upper panes. Our secondary glazing allows the original detailing to remain visible.
- Clear views of original glazing
- Multiple opening options
- Enhanced security
Sash Window Specialists Across London
We provide specialist sash window secondary glazing throughout London:
Explore Related Services
Discover more ways we can improve comfort, warmth and quiet in your home.
Victorian Properties
Sympathetic upgrades for Victorian houses and terraces.
Georgian Properties
Protect Georgian proportions and original glazing bars.
Listed Buildings
Heritage-approved, fully reversible glazing for listed homes.
Conservation Areas
Discreet glazing that meets conservation area requirements.
Bay Window Secondary Glazing
Bespoke solutions for angled and curved bay windows.
Acoustic Secondary Glazing
Cut noise by up to 54dB with acoustic-optimised glazing.
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No obligation. No pressure. Just honest advice from London's secondary glazing specialists.
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