Secondary Glazing – Choose Your Sector:
Secondary glazing is discreet, slimline and functional. Available in over 200 RAL colours where styles include vertical sliders, horizontal sliders, hinged units, inserts and bespoke arched frames.
Secondary glazing involves fitting a discreet internal window in addition to your existing, single, double and triple glazed window. It’s a cost effective and efficient way to insulate and sound-proof your windows, and perfect for use in Listed Buildings and conservation areas.
When sound-proofing is paramount, we recommend using a different glass thickness in your secondary glazing than that of your existing windows. Special acoustic glass provides maximum noise reduction.
For maximum thermal performance we specify “low E” glass, which has a special heat reflecting coating to help keep heat within the room. We’ve helped thousands of homeowners and commercial clients over the past 20 years. We’d like to think that we can help you too.
All aluminium frames are painted white as standard, though you can select from over 200 RAL colour options – to mirror the look and feel of your home.
Windows are made to measure, with options to accommodate nearly all window styles. Horizontal sliders are the most popular choice, though we can supply and install vertical sliders, hinged units, fixed and lift-out windows. Our secondary glazing can even be curved in house to form arched units.
Face or Reveal Fix
Made from durable aluminium, frames are slim, unobtrusive, and require little maintenance. They’re also easy to install by fixing to your existing window (“face-fixed”) or into the window reveal (“reveal-fixed”).
With a reveal-fix, having a 100mm-200mm air gap between secondary glazing and your existing windows will provide optimum performance – preventing heat and sound from passing through.
Benefits of Secondary Glazing
Recommended by English Heritage, the Listed Property Owners Club and the Energy Saving Trust, the benefits of secondary glazing include:
- Up to 80% noise reduction
- Minimise drafts, reduce heat loss by up to 60%
- An additional security barrier
- Condensation control
- Reduced carbon footprint
Our Product Range
Reduce Noise to a Whisper
Do you live on a noisy road? Reports indicate that a passing diesel bus often creates 85dB of noise. Correctly installed secondary glazing can reduce noise levels by 54dB, a reduction of 54dB will reduce the noise to 31dB which is the equivalent to a whisper.
To achieve the best acoustic performance, we advise secondary glazing to be installed with a 150mm to 200mm cavity between your primary glazing and secondary glazed unit.
Reduce Heat Loss
A weak point for most houses leaking warm air is our windows, a typical house loses 10% of its heat through the windows.”
As displayed in the thermal image the orange areas highlight heat escaping the primary windows. Secondary glazing is installed within the white dashed box, as the windows are purple we can clearly see less heat is escaping through the treated windows.
Why Secondary Glazing?
Secondary glazing offers the most effective sound insulation – significantly outperforming double glazing. From noisy roads to noisy kids, our windows can reduce noise levels by up to 80%.
Substantially improves the thermal insulation of existing single-glazed windows – reduces heat loss through the window by around 65% – around 10% more than double glazing.
Secondary windows offer an affordable, discreet, highly effective solution to enhancing building security. No external access is required, ideal for multi-storey buildings.
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