Secondary glazing Hertfordshire – Alternative solution
Our alternative secondary glazing service in Hertfordshire provides triple-glazing window insulation without the need for extra secondary framing.
Vacuum glazing substitutes all types of secondary glazing
We enhance existing sash windows by fitting vacuum glazing directly into the existing sashes.
The vacuum layer acts as an exceptional insulator, offering the thermal and sound insulation properties of triple glazing or better but with a fraction of the thickness and without altering the window’s original appearance.
This approach is particularly beneficial for heritage properties or buildings in conservation areas where preserving the aesthetic is crucial.
Vacuum glazing offers an ideal balance between maintaining the character of traditional windows and achieving modern standards of insulation and energy efficiency.
It’s a seamless upgrade that enhances the comfort and value of your property while respecting its architectural integrity.
Hinged / Fixed
Compare glazing solutions
Compare secondary glazing with our double glazing retrofitting service.
Unlike secondary glazing, the double glazing retrofitting method maintains the window’s original operation and does not add extra cleaning burdens.
Additionally, retrofitting tends to offer a more integrated and aesthetically pleasing solution, preserving the original look of the windows while providing all the benefits of modern vacuum-glazing technology.
We believe that double-glazing retrofitting is the ideal solution for residential properties, especially for homeowners seeking triple-glazing performance and aesthetics.
Compare the specifications of both glazing solutions below:
Add second framing from the inereor side
Look sleek as orginal window.
Listed builsing approval
Does not need a permission
90% approval rate
1.7 W/m²K – 2.7W/(m²K)
0.48 – 0.7W/(m²K) same as triple glazing
30dB – 45dB Depending on air gap between the existing primary window and the new secondary glazed unit.
35 dB – 39 dB
Cost (Materials and installetion)
£500 – £2200 By installing secondary glazing, you will need to allocate a separate budget for sash window maintenance, whereas reglazing encompasses the cost of sash window refurbishment.
£1500 per avarage window Price includes window frame restoration, draught-proofing, VIG glass cost of production and installation, painting.
Cost of refurbishing existing window frames
no included in secondary glazing price
Included in the price
78% – 79%
Additional glazing adds additional security.
Effective glazing solutions for Grade 2 Listed and conserve area buildings
The success rate for obtaining permission to replace window glass in listed buildings is remarkably high, with approvals exceeding 90%.
This impressive approval percentage is attributed to our window replacement service’s adherence to the standards and regulations specific to listed buildings.
Key aspects of our service that comply with these standards include:
- Maintenance of the original wooden window frames, inclusive of classic Georgian bars.
- Utilization of VIG glazing, notable for its slim profile, allowing integration into current window sashes.
- Vacuum glazing is renowned for its durability, with a lifespan exceeding 25 years.
- Comprehensive restoration of wooden frames is part of the reglazing process.
An extensive guarantee covers all elements of our reglazing service, providing peace of mind.
Guarantee on paintwork
Guarantee on VIG glazing
Guarantee on repairs made with Accoya
How much does it cost?
Upgrading classic sash windows with toughened (5x stronger than regular glass) vacuum-insulated glass (VIG) for double glazing typically comes at an approximate cost of £1700 per window.
Breaking down the expenses, the VIG glass and reglazing services amount to £800.
Draught-proofing ranges between £300 and £360, while rejuvenating and painting the window frame and sashes costs around £600.
This comprehensive pricing encompasses the installation of VIG, draught-proofing, and complete refurbishment of both the frame and sashes.
This often aligns with or even falls below the pricing for high-quality secondary glazing solutions for heritage structures.
What’s included in our double glazing service in Hertfordshire
Double glazing retrofitting
Supply and installation of Vacuum Double-Glazing
Window frame restoration
Restoration and rot repair for window frames and sashes
Installation of draught-proofing seals
Painting of wooden window frames
- Book a free quote —>
We fully survey your windows and provide recommendations for reglazing and restoration.
- We help you with building consent applications. Over 90% of our applications are approved. This is only applicable to Grade 2 listed properties. If your property is not listed, we will skip this step.
- When you receive approval, we will place the order for the production of a custom vacuum double-glazed unit.
- Our highly skilled craftspeople restore and reglaze your existing sash windows.