Sash windows restoration & Double glazing retrofit

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We are a team of joiners, decorators and experts in original sash windows restoration and double glazing of original windows in Listed properties. We have been repairing and retrofitting sash windows since 2008.

  • 500+ Happy
  • 8 Years Paintwork Guarantee
  • 20 Years on Repaired Parts
  • Google Rating

What customers say

Suzy, Homeowner

Sash Window Refurbishment in Hertfordshire

Rob, Homeowner

Sash windows restoration

Sash windows restoration

Double glazing existing Georgian Sash Windows

Matthew, Homeowner

Retrofitting original sash windows with double glazing in Suffolk

James, Homeowner

Sash windows restoration in Suffolk

Please Note:

Our minimum order quantity is 10 windows.
We do not work as an emergency call-out repair service.

More details

Our original sash windows restoration services

Our team of experts in traditional sash windows restoration and double glazing retrofitting. We combine premium materials and traditional and pioneering restoration methods.


Repair timber windows

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  • Decayed  window sills

    Decayed window sills

  • Rotten beading

    Rotten beading

  • Partially decayed frame

    Partially decayed frame

  • Loose putty

    Loose putty

  • Cracked  glass pane

    Cracked glass pane

Our skilled sash window specialists can repair your rotten sash window frames and laminate them with Tricoya wood to improve their durability.

Repairing wooden frames is an essential step in sash windows restoration that must be done before or with other services. Our sash windows restoration method allows us to provide an 8-year guarantee on paintwork and 20 years on all repaired sash window parts. 


We can also restore sash windows that you may think are not repairable, making our sash window service a great alternative to window replacement. 

We work with windows in Grade 2 listed properties as well as period timber windows in non-listed buildings. 


Original sashes functional restoration

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  • Unblocking stuck or painted shut sash windows

    Unblocking stuck or painted shut sash windows

  • Broken or snapped cord replacement

    Broken or snapped cord replacement

  • Sash window weights rebalancing

    Sash window weights rebalancing

  • Pulley replacement

    Pulley replacement

  • Restrictors and stops installation

    Restrictors and stops installation

Rotted frames or cracked paint may not affect your immediate comfort as much as stuck sash or sash that does not stay open or closed due to failed mechanisms. That is why it’s important to restore the functionality of your windows while repairing frames and upgrading glass.


Sash windows operate on a weight and pulley system that creates a counterbalance with the window, allowing smooth movement between its open and close position. Consequently, any issue with the weight or pulley can make the sash window tricky or even impossible to open. For tasks such as this or any other restoration work that your windows may need, our team will have them fully functioning once again.


We do not operate as an emergency call-out service, but we can repair cords or pulleys as a part of a timber frame restoration or double-glazing installation project.


Sash Window Double Glazing & Draught Proofing

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  • Improved energy efficiency

    Improved energy efficiency

  • Replace single glazing with double glazing

    Replace single glazing with double glazing

  • Reduce noise in half with new double glazing

    Reduce noise in half with new double glazing

  • Reduces cold draughts and rattle

    Reduces cold draughts and rattle

  • Improve windows security

    Improve windows security

Original windows can now be retrofitted with slim-profile double-glazed units to improve thermal efficiency and reduce outside noise energy bills.

Sash window double glazing is usually done together with sash window draught-proofing to reduce draughts and rattling of sliding sashes.

Our completed projects

    Double glazing Georgian sash windows with FINEO glass

    Double glazing Georgian sash windows with FINEO glass

    Vacuum double glazing installation

    Vacuum double glazing installation

    Windows refurbishment in Care home – Old Vicarage Care Home, St Neots

    Windows refurbishment in Care home – Old Vicarage Care Home, St Neots

    Sash Window Refurbishment in Hertfordshire

    Sash Window Refurbishment in Hertfordshire

    Sash windows restoration in Suffolk

    Sash windows restoration in Suffolk

    Reglazing wooden windows in Colchester

    Reglazing wooden windows in Colchester

We renovate sash and casement windows

Windows in Grade 2 listed properties

Windows in Grade 2 listed properties

Residents of Grade 2 listed properties no longer need to forego contemporary advancements in order to maintain the authentic, historical appearance of their homes.


By utilizing ultra-thin double glazing specifically designed for conservation properties, we can enhance your windows to deliver a modern standard of comfort.


Additionally, we can perform like-for-like sash window repairs, ensuring that the traditional aesthetic of your property remains intact while benefiting from improved functionality and insulation.


Before & After Sash Bay Window Restoration


Timber window sill replacement


Curved sash window restoration

Why choose us

  • In-House TeamIn-House Team

    We do not hire temporary staff. Each member of our team has been thoroughly trained and has been working with us for many years.

  • Since 2008Since 2008

    We have been in the business for over a decade, and we’re here to stay.

  • InsuredInsured

    Our insurance cover is 5m

  • Full ServiceFull Service

    From glass installation to paint finishes – we cover everything. So, when planning renovations, you can rest assured that your timber window work is fully covered.

  • GuaranteeGuarantee

    We have complete faith in our products and services and truly care about providing a fantastic job that our customers are happy with. This is why we offer a comprehensive guarantee to ensure customer satisfaction.

  • Family Run BusinessFamily Run Business

    Just like building a family home fit for a future generation, we have built a sustainable family business.

  • Fixed Timeframe Fixed Timeframe

    You don`t have to worry about any scheduling issues, as when we give you a quote, we provide a specific timeframe for the project to be completed.

  • InnovationInnovation

    We are constantly upgrading our tools to ensure that we provide a state of the art job with tailor-made equipment for the project at hand.

Our reviews

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.

Really pleased with our windows! Prompt and helpful communication, extremely hard working team and a great looking (and hopefully better functioning) end result. Thank you!

Vanessa Nash

Alex and the team have restored our 20 year old sash windows so they look brand new. The team worked non-stop to complete it and made sure everything was to an excellent standard. Thank you.


We’re very happy with the work we recently had completed on the windows. It was also done in great time, with the guys coming nearly every day, including weekends – absolute grafters. Thank you, our windows look great!

Sarah Mayne

We had an excellent experience with Chameleon Decorators. The work was completed on time and to a very high standard throughout, all at a fair price. Would have no hesitation in providing a recommendation. Please note that the team work on the exterior only so you will need to factor in an internal job also!

Oliver Taylor


Very pleased with the results, very professional service. Would recommend.

Stephen Mcmullen

Excellent communication, service and professionalism. We spoke with Chameleon to restore some rotting wood french doors and wooden windows, as well as redecorate. We’d use them again without hesitation and would thoroughly recommend them.

Jamie Newman

Alex and his team are superb. We have used them before, and always been impressed – as we were this time – by their work ethic, their expertise and knowledge, the quality of their work, and their efficiency. I recommend them very highly indeed.

Emma Goddard



How much will it cost to renovate my sash window?

Sash window restoration work starts at £500 per window. The cost will depend on several factors such as the window size, whether it requires glass or sill replacement, draught-proofing installation, functional restoration etc. The cost also depends on the number of windows and access to them. If you live in a busy high street with limited access to the windows, the cost per window will be significantly higher.

What is the lead time to get the exterior window renovation work done?

Generally speaking, a 15 window project will take us 5-7 days.

Do you repair windows on Grade 2 listed buildings?

Yes, we regularly work with Grade 2 listed buildings and conservation area properties. We do like-for-like timber frame repairs. They do not require planning permission as we do not change the look of the windows.

Can you install double glazing into the existing timber window frames?

Yes, we can remove old single glazing and replace it with ultra-thin double glazing.


Sash windows restoration enquiries

Contact us now to obtain a Free, No-Obligation Quotatio