Sash Window Repair

Windows that look better and last longer

Restore your original sash windows with repairs that improve lifespan, preserve character and avoid costly replacements

Trusted Craftsmanship, Backed by Real Reviews

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Robin Harris profile picture
Robin Harris
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Nick,Jack and Mickie installed draught-proofing and renovated my windows in my 19th century house. They were polite, tidy and did an excellent job. I highly recommend them.
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steven stallion
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Excellent. Jack, Nick and Robie were extremely professional, polite, informative. Top guys. Worked to a very high standard taking all care needed. Clean and tidy. Top Notch.
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Spencer Berry
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Nick and jack at Sash Window Preservation did a really nice job on our upstairs sash windows and also tricky alcove windows. They were lovely guys and no trouble to have round the house. Thanks guys and to the team
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Andrew Clark profile picture
Andrew Clark
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Alex did a great job. We’ve used the company for the third time and would highly recommend them again. Thank you.
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Alison Lewis profile picture
Alison Lewis
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Alex came to restore windows. He was courteous, professional and cleared up behind him. Would recommend this company.
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Alan Tunney profile picture
Alan Tunney
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We had the pleasure of Sash Window Preservation replacing sash window to our property and Jack and Nick completed the works in a polite and professional manner. I was was in the construction industry for over 45 years and find it hard to find any fault with these men. They were polite, reliable and very neat and tidy and nothing was too much trouble. They have done an excellent job I would highly recommend Jack and Nick and of course Sash Window Preservation. 10/10
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Andrew Lang profile picture
Andrew Lang
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Brilliant job by Scott and Shay, and the nicest guys to deal with. Thank you!!
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Sally Musitelli profile picture
Sally Musitelli
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We recently had our old sash windows restored and partially replaced, and the result is excellent. The craftsmanship is outstanding — the new windows are beautifully made and blend seamlessly with the originals, preserving the character of the property while significantly improving performance. Installation was carried out to a very high standard. The team — Adam, Ricky, George, and Gary — were professional, efficient, and clearly took pride in their work. Attention to detail was evident throughout, and everything was left clean and tidy at the end of each day. Overall, a very high-quality job from start to finish. Highly recommended.
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Emma Leach profile picture
Emma Leach
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Jack and Nick B were just incredibly good. Patient, gentle, precise, very careful. And really lovely people to have working in your home for a week. They did a wonderful job.
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Luna and Alessandro
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Gary and his wonderful team (George, Nick and Jack if I remember correctly) replaced our 120 year old Edwardian sash windows for exact modern double glazed replicas and we could not be more pleased. Beautiful windows, there is much less noise and the rooms are no longer cold. They draught proofed an older window too which now is like new. Fast and efficient service, and certainly fairly priced. Thank you! 10/10.
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Timber Sash Window Repair

Timber sash window repair by Sash Window Preservation

Are you struggling with sash window rot, or other problems that are impacting the efficiency and safety of your windows? Sash Window Preservation can help you tackle your sash window repairs with professionalism. Operating across Greater London and the East counties, our team is here to help.

Sash window rot repair and rebuilds

If your sash windows, frames or sills are suffering from rot, or other issues that are impacting their structural integrity, our team will carefully assess the situation before carrying out a refurbishment. We understand that each window needs to be treated differently, and our years of experience in the field help us to tackle each sash window repair project with care and precision.

If the extent of the rot is minor then we would cut back any rotten timber, treat and then apply a durable, hard wearing two-part epoxy resin Repair Care treatment. Where necessary we will splice in timbers using traditional carpentry techniques.

The benefits of repairing sash windows

When it comes to window rot repair, our team will make every effort to restore your current window, with splicing techniques and careful repair treatments. However, in cases where the damage is extreme, we will replace your windows, sills and frames. We understand the importance of maintaining the aesthetic of your property, which is why we will replicate frames and windows to their exact original features. With our own joinery yard, you can be assured that where necessary all of the new joinery will be manufactured entirely in keeping with your existing windows.

Sash Window Preservation is a well-known company based in Norwich, with an excellent reputation. We are CERTASS qualified and a CHAS accredited contractor, a company you can rely on to carry out sash window repair and rebuild services to an exceptionally high standard.

Sash Window Repair FAQs

Can sash windows be repaired rather than replaced?
In most cases, yes. Rot, frame damage, and operational faults don’t automatically call for full removal, and assuming the worst before a proper look is taken wastes money. Because the work required varies significantly from one property to the next, each window is assessed on its own before any recommendation is made. We only advise work that is genuinely needed. Repairing rather than replacing preserves your building’s original character, extends the life of the windows, and costs considerably less than starting from scratch.
Can rotten sash windows be repaired?
Minor to moderate rot is repairable in most cases. Timber splicing and specialist repair compounds that bond properly into the existing wood are two methods we use regularly, and they hold well when applied correctly. Where only a single section has decayed, that section is removed and replaced while the surrounding frame stays put. This limits scope and cost at the same time. If deterioration is too far advanced for repair to make sense, we’ll say so plainly.
How much does sash window repair cost?
It depends on the number of windows, how much damage there is, and what each repair specifically involves. Minor work costs a fraction of full replacement. Before anything begins, you’ll receive a written quotation that breaks down per-window recommendations in plain terms. No vague estimates. Nothing appears on the final invoice that wasn’t discussed with you beforehand.
How do I know if sash windows need repairing?
Draughts, rattling, sticking sashes, cracked paint, difficulty opening, and water getting in are all signs worth acting on. Left unaddressed, these problems worsen, sometimes fast once moisture reaches the timber and begins spreading to adjacent sections or the ironwork. Catching it early keeps the job contained.
Is repairing sash windows better than replacing them?
Where repair is viable, it’s the route we recommend. It preserves original character, protects property value, and avoids unnecessary cost. If the deterioration is too advanced, we’ll tell you that honestly.

Results that speak for themselves

The work speaks for itself.

Our skilled fitters helped to bring this beautiful Victorian bay window back to life in Bury St Edmunds:

Image of property where Sash Window Preservation are restoring and repairing sash windows
Amazing sash window repair carried out by Sash Window Preservation

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Contact us today for sash window advice

For help with double glazing, draught proofing and bespoke sash window repair across the Eastern Counties and Greater London, get in touch with Sash Window Preservation on:

01603 908 252
01223 927 252
info@sashwindowpreservation.co.uk
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CASE STUDIES

Sco Ruston &
Hall

The Oaksmere &
Suffolk

Chiltern Hall &
Suffolk