Sash Window Repairs London
Mortice & Green is London’s original sash window repair company, providing specialist services since 1994. As a family-run business of experienced restorative joiners, we have spent decades preserving and improving traditional sash windows across London, combining established craftsmanship with a detailed understanding of period joinery.
Our approach is simple and honest: we only recommend the work your windows genuinely need. If a sash window can be repaired, we repair it rather than upselling an unnecessary replacement. From minor repairs and draught proofing to timber repairs, overhaul work and complete sash window restoration, we provide a full range of services to keep traditional windows working and looking their best.
Here at Mortice & Green, we provide a comprehensive range of sash window repair services, from complete sash window restoration to minor and major repairs tailored to the condition of your windows. Our London sash window repair service can replace broken sash cords, replace rotten sills and we can even carry out full sash window draught proofing to help ensure your sliding sash windows are as energy efficient as possible.
Sash window repairs in London by a family run London sash window renovation service that cares about you and your windows.
Not only do be provide sash window repairs we can also repair all types of wooden windows and even wooden doors!
We specialize in the restoration of wooden windows so whether your windows are sash windows or casement windows
give Mortice & Green sash window repairs a call today to see what we can do for you.
Rotten wooden Windows? Have you been told that you need to replace the wooden windows with new expensive windows?
Do not replace your sash windows until you have spoken to us, we can restore your original wooden sash windows and repairs the sash windows giving them a new lease of life. Once all the sash windows are fully draught proofed and renovated you will see a major difference in the thermal qualities and will probably not think again about replacement sash windows.
The true London based sash window repair expert Mortice & Green sash window repairs
Our Sash Window Repair Services In London
At Mortice & Green, we provide a comprehensive range of specialist sash window repair and restoration services across London. Whether your windows are difficult to open, letting in draughts, affected by damaged timber or simply showing the effects of age, we focus on identifying the specific problem and carrying out the work that is genuinely required. Wherever possible, our experienced restorative joiners repair and preserve the existing sash windows, helping maintain their original character while improving their condition, operation and everyday performance.
Sash Cord Repair And Replacement
Broken or worn sash cords can prevent a window from opening and closing correctly. We repair or replace damaged cords and restore the sash mechanism so the window operates smoothly again.
Sash Window Draught Proofing
Gaps around older sash windows can allow cold air in and contribute to rattling. Our draught-proofing service helps reduce unwanted draughts and movement while allowing your sash windows to continue opening and closing as intended.
Timber Repair And Rot Treatment
Areas of rotten or damaged timber do not always mean the entire window needs replacing. We assess the affected sections and carry out targeted timber repairs where appropriate, helping retain the original joinery wherever practical.
Sash Window Renovation And Refurbishment
For windows showing wider signs of age and wear, renovation can address several issues as part of one service. Depending on their condition, this can include repairing components, improving operation and restoring the existing windows rather than replacing them unnecessarily.
Double Glazing Of Existing Sash Windows
Existing sash windows can, where suitable, be adapted to accommodate double glazing. This provides an option for homeowners who want to improve their windows while retaining the character and existing framework of traditional sash windows.
Glazing Bar Repair And Glass Replacement
Damaged glazing bars and cracked or broken panes can often be repaired individually without replacing the complete window. We can restore affected glazing bars and replace damaged glass while taking care to preserve the window’s traditional appearance.
Sticking And Stuck Sash Windows
Paint build-up, swollen timber and problems with the sash mechanism can all cause traditional windows to stick or stop opening altogether. We identify the cause and carry out the necessary adjustments or repairs to get the sash moving correctly again.
Sash Window Repairs Across London
Mortice & Green provides specialist sash window repairs across all areas of London, including North, South West, West, North West, Central and East London. We regularly work in areas such as Islington, Hackney, Kensington, Chelsea, Hammersmith, Fulham, Putney, Wimbledon, Hampstead, Notting Hill, Ealing and Richmond.
Our restorative joiners are also experienced in working on sash windows within conservation areas and listed buildings, where preserving original features is particularly important. We provide specialist advice as part of every free site survey, helping you understand the most appropriate repair or restoration options for your property.
Why Choose Mortice & Green For Sash Window Repair In London?
Over 30 Years Of Sash Window Expertise
Founded by Morris Greenberg in 1994, Mortice & Green has more than 30 years of specialist experience repairing and restoring traditional sash windows. The business continues to work with the same values of quality craftsmanship, practical advice and respect for original joinery.
Family-Run With No Sub-Contracting
We are a family-run company and never subcontract our sash window work. The people who assess and quote for your windows are the same skilled specialists responsible for completing the work, providing consistency from the initial survey through to completion.
Honest, Repair-First Advice
We assess every window impartially and only recommend the work that is genuinely required. Many clients contact us after being told their sash windows need complete replacement, when our restorative joiners are able to repair and preserve the originals instead.
Clear And Transparent Pricing
Every project begins with a free site survey followed by a clear written quotation, so you know what work is recommended and what it will cost. Our pricing is based on what your windows actually require rather than encouraging the most profitable option.
Conservation And Listed Building Experience
We have extensive experience repairing and restoring sash windows in London’s conservation areas and listed properties. Where replacement is genuinely required, we can create bespoke hardwood windows designed to meet relevant conservation requirements while respecting the character of the property.
Made In England
Our replacement sash windows are manufactured in England using quality hardwood timber. Each window is made to measure and designed to closely match the original style, proportions and architectural character of the property.
Get A Free Sash Window Repair Quotation In London
If your sash windows are damaged, draughty, difficult to open or simply in need of some attention, Mortice & Green can provide honest advice on the most appropriate solution. We offer free site surveys across London, allowing our specialists to assess your windows and identify exactly what work is required. You’ll then receive a clear written quotation with no pressure to undertake unnecessary work. Get in touch with our team to arrange your free sash window repair survey.
Frequently Asked Questions
What types of sash window repair do Mortice & Green carry out in London?
We carry out all types of sash window repair including broken or snapped sash cord replacement, repair of rotting or damaged timber sashes and frames, glazing bar repair and replacement, fixing stiff or stuck sash windows that will not slide freely, repairing or replacing sash window catches and pulleys, filling gaps and cracks in frames, and repairing damaged or missing putty. We assess every window individually and carry out only the work that is genuinely needed.
How do I know if my sash window needs repairing or replacing?
In most cases, original sash windows - even those that appear to be in poor condition - can be repaired and restored rather than replaced. Signs that repair is needed rather than replacement include: broken sash cords causing the sash to drop; rattling or draughty windows where the timber itself is sound; minor rot confined to the bottom rail that can be cut out and repaired; and stiff or painted-shut windows where the mechanism is intact. Mortice & Green always provides an honest assessment and will tell you clearly whether repair or replacement is the better option for your specific windows.
How long does a sash window repair take in London?
The duration of a sash window repair depends on the type and extent of the work required. A single sash cord replacement can typically be completed in one to two hours. Draught proofing a single window takes approximately three to four hours. A full timber repair and renovation of a window requires a day or more depending on the complexity. We give you a clear timeline at the quotation stage and always aim to complete work with minimal disruption.
Do sash window repairs require planning permission in London?
In most cases, like-for-like repair of an existing sash window — replacing sash cords, repairing timber, refitting glazing - does not require planning permission and falls under permitted development rights. However, in conservation areas and on listed buildings, any external changes to windows may require consent from the local authority. Mortice & Green advises on any planning or consent requirements as part of our free site survey.
Are your sash window repairs guaranteed?
Yes. All repair work carried out by Mortice & Green is guaranteed against workmanship defects. We stand behind the quality of every job, and if any issue arises directly from our workmanship within the guarantee period, we will return to put it right at no charge. We have maintained this commitment to quality since the company was founded in 1994.
Do you provide sash window repairs for landlords and letting agents in London?
Yes. We work with landlords, property management companies, and letting agents across London on both individual window repairs and ongoing maintenance programmes. We are experienced in working within occupied properties with minimal disruption to tenants, and we can provide documentation and invoicing in the formats required by property management companies. Contact us to discuss your portfolio requirements.