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15–25-year guarantee on vacuum glazing
A failed unit gets new glass free of charge
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20-year guarantee on timber repairs
Repairs in Accoya and Tricoya timber
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1,000+ homes restored since 2008
East Anglia, London and the Home Counties
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Rated 5.0 on Google
Chameleon Sash Windows Specialist provides wooden windows restoration services in East Anglia and South East. We restore traditional sash windows and work with private and commercial clients on all period properties.
Our team specialize in restoring and double-glazing all styles of original sash windows, french doors and casement windows in Grade 2 listed buildings or buildings in conversation areas. We provide a cost-effective alternative to complete sash window replacement, ensuring energy efficiency and preserving the historic appearance.
Our sash windows specialist services
Our comprehensive range of services is committed to preserving traditional sash windows while improving their energy efficiency to compete with modern A-rated windows.
Wooden window frame refurbishment
Learn more about Wooden window frame refurbishmentOur window specialists are experienced in handling all types of timber frame issues. Over the past ten years, we have restored thousands of sash windows. We understand how to enhance the durability of restored frames, making them as long-lasting as those made with Accoya wood.
To achieve this, we have developed our unique timber laminating technique, which imparts exceptional durability to the original sash windows undergoing restoration.
Sash windows draught-proofing
Learn more about Sash windows draught-proofing
Sash window draught-proofing is a great option for Grade 2 listed buildings to remove rattling and draught. It does not require planning permission. We usually do window draught-proofing with timber frame repairs or double glazing retrofit.
Our team instals new staff and parting beads with draught-proofing seals and adds weather seals to the meeting rail. We can also draught-proof casement windows and french doors.
Repairs and functional restoration
Learn more about Repairs and functional restoration
Unblock stuck sashes
Repair broken cords
Rebalance weights
Replace Pulley
Install restrictors & stops
From sash cords repair, glass pane replacement, and window sill replacement to unblocking painted shut sashes. We can restore the functionality of your sash and casement windows.
All sash window repairs are included in our sash window refurbishment & draught-proofing price.
Say goodbye to draughts, heat loss, and excessive external noise
Learn more about Say goodbye to draughts, heat loss, and excessive external noise
External noise pollution
Cold draught
Condensation on windows
Bulky secondary glazing
Heat-loss through windows
Living in a period home with single-glazed windows, you’re well aware of the challenges during winter, as well as the effort and cost required to heat your home. Moreover, if you’re situated near busy roads, you know how easily sound penetrates your home through a single pane of glass.
We have encountered numerous properties facing this issue and have successfully helped many homeowners achieve what once seemed impossible: installing double glazing with all its associated benefits while retaining the original timber frames.
All of this has become possible due to the innovative vacuum double glazing, which is only 7mm thick. Its slim design makes it an ideal fit for the narrow stiles and glazing bars of period sash windows. This new generation of glass delivers superior thermal performance and U-value compared to double Low-E and 34mm triple glazing.
Areas Of Service
We specialise in sash window double glazing retrofitting
Our team of sash window specialists can replace inefficient single-glazing in the original box sash window with heritage double-glazing. This will improve the energy efficiency of your traditional timber sash windows and reduce energy bills.
The thermal photo below shows double-glazed sash windows by our team.
The ground floor window of the period property is single-glazed, while the window above it has been retrofitted with slim-profile double-glazing. You can clearly see the significant thermal difference between the two.
Traditional wooden sash windows can now be double-glazed, so you do not need a more expensive window replacement service.
The new generation of double glazing (VIG – Vacuum insulated glass)
The innovative vacuum double glazing is eight times more efficient than single glazing and four times more efficient than secondary glazing. This advanced glass technology also boasts greater durability than standard double glazing insulated with inert gases like Krypton and Argon.
U-value of different glazing solutions
The U-value measures heat loss; it tells you how energy-efficient glazing is. The lower the U-value, the better thermal insulation glazing has.
- Single glazing: 5.2 W/m²K
- Regular double glazing (is not suitable for retrofitting): 1.2 – 1.9 W/m²K
- Secondary glazing: 2.7 W/m²K
- Triple glazing: 0.8 W/m²K
- Our vacuum heritage double glazing: 0.7 W/m²K
We don’t sell replacements and promote draught-proofing as a miracle solution
Unlike other sash window companies, our primary focus is window refurbishment and retrofitting; we don’t sell new windows or double-glazed sash inserts. Our expert team is dedicated to the concept of repair rather than replacement.
We also don’t promote draught-proofing as a miracle solution for all energy efficiency issues, as some companies do.
Our approach is direct and honest; we will only recommend a service that effectively addresses your problem. The staff members who attend our quote meetings are genuine window experts, not salespeople.
Guarantee
For your peace of mind, our services come with guarantees from our company and manufacturers of products we use, such as vacuum double glazing, timber, and seals.
We offer 20 years on repaired timber window parts, and the vacuum double glazing we use has a 15–25 year guarantee covering failed double-glazed units.
What Customers Say
We pride ourselves on delivering a high-quality job that our customers will be delighted with. Don’t just take our word for it, have a look at what our clients and customers have said about our services.
Our completed projects
Windows refurbishment in Care home – Old Vicarage Care Home, St Neots
Windows refurbishment in Care home – Old Vicarage Care Home, St Neots
Retrofitting original sash windows with double glazing in Suffolk
Retrofitting original sash windows with double glazing in Suffolk
Contact us for a free quote
If you are looking for reliable and professional sash windows specialists with executive customer service in your area, look no further than Chameleon Windows! Contact our friendly team today, and we will be happy to restore your windows.