The Heritage Window Company
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Secondary Glazing
Modern Efficiency, Heritage Aesthetics
What is secondary glazing?
Secondary glazing is the ideal solution for properties that value heritage aesthetics, home insulation and security – without the need for unnecessary planning permission.
Perfected for listed properties, we can install secondary glazing where window replacement isn’t an option.
When fitting secondary glazing windows, we’ll design and install an internal window pane to your existing windows. This creates an extra layer of insulation and soundproofing without altering the original frames
Save on energy bills and modernise your home today.
Explore our secondary glazing windows
Horizontal Slider
Perfect for listed buildings or modern homes, our horizontal sliders offer excellent thermal and acoustic insulation with a sleek, unobtrusive finish.
Vertical Slider
Designed for heritage sash windows, these vertical units preserve original charm while delivering modern comfort and efficiency.
Hinged Units
Slimline and versatile, our hinged units open inward like a door and can be side- or top-hung to suit your window layout.
Lift-Out Unit
Great for occasional access, lift-out units reduce heat loss and noise while maintaining a clean, minimal appearance.
Fixed Unit
Low-maintenance and discreet, fixed units sit neatly inside your existing window to boost insulation without altering the look.
Bespoke Arched Units
We craft custom shapes to suit even the most unique windows, offering tailored secondary glazing for arches and other non-standard designs.
Make the smart choice with aluminium doors
No replacement, no problem
Perfect for protected homes that would otherwise need planning permission to replace inefficient windows, secondary glazing can modernise the thermal efficiency of any home.
Made to match your home
With over 200 RAL colours and discreet profiles, our secondary glazing can blend seamlessly with your existing windows and décor – or stand out with a pop of colour.
Quieter living
Secondary glazing offers the most effective level of noise reduction whilst also boasting thinner aluminium frames.
Warmer home, lower bills
Secondary glazing adds an extra layer of defence to guard your home against heat loss, ideal for older properties or those concerned with energy usage.
Reduce condensation
Secondary glazing will help eliminate condensation in the home, preventing damp and chill.
Enhanced security
Secondary glazing makes your windows incredibly difficult to open from the outside, creating a further layer of defence against forced entry.
Excellent Trustpilot rating
Our 4.8-star “Excellent” Trustpilot rating reflects the quality of our secondary glazing and the service that comes with it.
10 Year Guarantee
Every installation is covered by a 10-year FENSA and IWA-backed guarantee, with deposits protected from the moment you commit.
Available in classic and enhanced secondary glazing
Enhanced secondary glazing: Ult...
Courteous and professional workmen
When you choose The Heritage Window Company, you’re choosing trusted craftsmanshi...
Secondary glazing FAQs
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