Get in touch

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    At Wandsworth Sash Windows, our focus is on doing what is right for our customers. We will assess all windows on an individual basis and will offer you sash window repairs in London if they do not need to be replaced.

    Sash window repairs are not easy and need to be carried out by someone who knows exactly what they are doing. Our team are just those people. All window repairers and installers are experienced carpenters, meaning they have a full understanding of a window’s construction. With us, your sash window repair project will run smoothly.

    Sash window refurbishments in London

    Sash windows are continually improving and the technology behind them is getting better all the time. If you have older sash windows, chances are the installers didn’t have access to the high-quality insulation materials we use today. We can refurbish your sash windows using modern materials to make them as efficient as possible.

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    Poor insulation

    Older sash windows suffer from poor insulation mainly in the staff and parting beads used. This means heat escapes through the sides of the windows.

    Broken or rotten timbers

    Untreated rotten timber will cause future increased damage to your sashes as it will spread. Rot usually starts from the bottom and works its way up. It causes the sashes to fall apart and not operate correctly.

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    Ill-fitting windows or glass panes

    The main source of heat loss through a window is through the glass itself. Ill-fitting or broken panes means there is no barrier from inside to outside at all and leads to a cold breeze running through.


    Draughts mean sash windows are not as well-insulated as they should be. If there are too many draughts then some level of repairs or replacements should be considered.

    Broken locks

    Locks are designed to make sashes secure. Without them someone from outside could fall out of the window or the property could become prone to theft. Good locking systems also help bring the sashes closer together so the window is overall better insulating.

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    Damaged sashes

    Damaged sashes are a security concern. If they are left without being repaired then the damage could get worse.

    Talk to us about any issues you are experiencing with your sash windows. Our team are in the perfect position to help. We work with customers across the UK to restore their sash windows and improve their homes. Call 02079247303 or email to find out more about the process.

    What do our customers think?

    Draught seal and overhaul

    We repair sash windows as part of our draught seal and overhaul service. This is our most basic service offering, where we will carry out maintenance on existing sashes and frames.

    What will the repair process involve?

    Before carrying out any work on your property, we will conduct a full assessment to see how we can help you. When you get in touch with us, we will first arrange an initial survey where a member of our team will look over your property and windows to work out the scope of the project. We can then make recommendations for your sash window renovation in London, including repairs, draught proofing and overhauling.

    Improving your existing windows with sash window renovation

    Here are some of the ways in which we can improve your existing sash windows during our repair process:

    • Replace inefficient insulation
    • Repair timbers and sills
    • Rebalance and adjust individual sashes
    • Install new unbreakable cords
    • Supply new retaining beads with integrated draught excluders
    • Install brand new window ironmongery, including insurance-approved locks

    We are always careful not to alter the appearance of your sash windows – unless you want us to, of course! We make sure they are in keeping with the look and character of your property, maintaining its period charm. We will leave your windows looking refreshed, renewed, and with greatly improved energy efficiency.

    As standard we do not include any painting work with our draught seal and overhaul service. However, we can also add this if requested.

    Case Studies

    Oriel Road Case Study

    Oriel Road Case Study

    Wandsworth Sash Windows manufactures joinery for installation across London. This job, for Mr W on Oriel Road, took us to Hackney.

    Read more

    Made in Britain

    Buying British

    At Wandsworth Sash Windows, we make all our windows, doors, and joinery by hand in our Sussex-based workshop.

    Help us support homegrown craftsmanship and create local jobs – buy British.

    Contact the Wandsworth Sash Windows team

    Talk to us – we can help with your bespoke window, door and joinery requirements. You are very welcome to pop into our showroom, which is based at Unit 2, Kangley Business Centre, Kangley Bridge Road, London SE26 5AQ.

    You can call us on 02079247303 or email