At Sash Window Experts, our mission has always been to help preserve our country’s beautiful period windows and doors. For over 30 years, our small team of accomplished craftsmen has been working tirelessly to achieve these aims, carrying out countless sash window repairs and renovations in properties across Sussex and the South East.

Whether on-site or in our joinery workshop, our team of local artisans take great pride in restoring the beautiful period features and functions of sash windows back to their former glory. From slide mechanisms and draught proofing to accommodating advances in double-glazing technology, we can help renovate sash windows for all kinds of period properties, so that you can enjoy your home’s classic features for many more years to come.

Window Sills and Frames

One of the most common problems with sash windows is window sill decay as a result of paint deterioration. Rather than replacing the entire box frame with a new one, Sash Window Experts can carefully remove the existing lower box assembly and replace it with a new hardwood sill section, complete with pulley and out linings bonded in with epoxy resin. We use the same joints that were originally used to maintain the strength of the box frame.

By carefully piecing in new timber sections with detailed mouldings to match the original profile, we can extend the lifespan of period windows and all types of sash windows including Georgian Sash Windows.

Completing a two-part repair using our unique epoxy resin helps to strengthen the tenon joints that make up the sashes. We remove localised areas of rot to the sashes, sills and box frame, then apply a stabilising solution. The epoxy resin is then applied and left to cure before being sanded to match the original profile and protected with primer. The new finish will be as good as the original timber. It won’t crack open over time, since the epoxy resin moves with the natural expansion and contraction of the timber.

Before and After

Sash Cords, Pulleys and Weights

When we carry out a complete sash window restoration, we remove the sashes from the box frame, including any paint build-up from the running surfaces and prime any bare timber as necessary. Once the sashes and box frame are prepared, the existing cords and beads are discarded, and the window is re-corded with our modern improved sash cords.

We also check the counterbalance weights and pulleys, making adjustments as required.

Window and Door Furniture and Hardware

As part of our sash window repair work, we re-align and reuse existing original catches wherever we can. If you would prefer to have new ones, replacements are available on request.

At Sash Window Experts, we stock a range of traditional and modern window fittings in a range of finishes including window catches and locks. We can also source a variety of other hardware for sash windows, casement windows and doors.

Draught Proofing

Draughty windows that rattle and let the cold air in (and warm air out!) can be a major problem with original sash windows that have been poorly maintained. At Sash Window Experts, we offer a comprehensive draught proofing service that can be carried out as a standalone service or as part of an overall sash window refurbishment project.

Fitting an unobtrusive draught-proofing system won’t detract from the beauty of your period sash window, and it will have the benefits of reducing draughts, outside noise and rattling window sounds while ensuring the sashes glide up and down smoothly as they should.

Double Glazing

Double glazing has become an essential feature of modern homes. At Sash Window Experts, we recognise the enormous benefits double-glazed windows can bring. Our skilled craftsmen work with the latest advances in double-glazing technology and can deliver effective double-glazing services for repairing or renovating your sash windows.

We offer beautiful double-glazed hard or soft wood sashes with warm edge technology while retaining all the essential period features including the original moulding designs.

Sash Windows

Window Security

Sash Window Experts work with a broad selection of replacement glass and security options for your complete peace of mind. While cracked window panes or broken glass can be a common issue, we can solve the problem by carrying out a wide range of expert glass and putty repairs using clear float, laminated, toughened, crown, obscure, patterned and sealed glass units.

Today’s buildings and contents insurance companies tend to insist on key-operated locks to be fitted to sash windows; the original centre catch alone is no longer enough. At Sash Window Experts, you can choose from a variety of options for locks and traditional centre catches in a choice of finishes that will be expertly fitted to your sash windows.


Whether your sash window repairs are carried out in our joinery workshop or at your property, meticulous care is taken every step of the way. Once rotten timber and failed paintwork have been removed and made good, we will leave the repaired and refurbished period windows prepared and ready for decorating, having primed all bare timber where necessary.

To find out how we can help bring all the classic period features of your homes’ sash windows back to life as well as repair them to prevent draughts and noise ingress, contact our small team of highly skilled craftsmen on 0800 197 0129 or fill out the form on our Contact page and we’ll get back to you as soon as possible.

Repairs FAQs

What can you do to improve the insulation of my sash windows?

We have several ways that we can enhance the insulation of your windows. Our draught-proofing and repair service will substantially improve the performance of existing timber sash windows. Secondary glazing will boost energy efficiency while retaining the character of your home, which is particularly suitable for listed buildings. If window replacements are needed, we can manufacture new ones, including fully insulated double-glazed sash windows.

Do you need to put up scaffolding to carry out the work?
Do I need planning consent for sash window repairs or renovations?

Arrange a No Obligation Survey With Mark

Hi, I’m Mark, owner of Sash Window Experts. I’d love to talk to you about restoring period windows. Please fill out the form or call me on 01403 602701 to arrange your FREE no obligation window survey and to discuss your requirements.

What Our Customers Say

Helen Thomas
If I could clone you for all the other work we need to do over the next few years, I would! Thank you Mark for having such a good team in place. And huge thank you to Gary, Alex, John and Glen for taking such care of our windows and giving them what they needed after years (decades?) of neglect. Your attention to detail and 'doing it right' was very much appreciated, and your ability to solve problems was awesome. Helen & Tim, Godalming
Roxana Avanu
Amazing service from start to finish, no issues and no drama. The name Sash Window Experts is well chosen. Mark and his team - Gary and John were extremely helpful and professional and the end product - new sash sound proof double glaze windows upstairs and the kitchen triple sash window restored was top quality. I am very grateful to Sash Window Experts.
Amy Clarke
Cannot fault Mark and his team. We replaced the original sashes to our 1890's home with new like-for-like hardwood double glazed sash windows, and apart from being warmer, quieter, cleaner and altogether much smarter, you really wouldn't tell the difference - an amazing feat! They are absolutely beautiful windows, so well crafted and fitted, and the restoration of rot on the original box is imperceptible. Gary was friendly, clean, professional, and safe throughout the fitting, and very thoughtful in causing minimal disruption to the home. Absolutely thrilled with everything from the service to the price to the final finish. Delighted with them. Would recommend in a heartbeat.
Alison Fordham
We were nervous about getting our Victorian French windows restored and had received a ridiculously high quote. Sash Window Experts came in at a good price, gave a timeframe that worked with our schedule and did a great job. All as promised. The fitter, Gary, put the doors back in with great care and took time made sure they worked smoothly and also discussed any queries with us. Definitely made the job value for money. Very happy customers! We are looking forward to beign able to open our doors again and enjoy the garden. Thank you Mark and Co!
Peter Jones
Our house is Edwardian and has the original sash windows from 1906. I really want to make sure that any double glazed windows did not look out of place - so the woodwork, including the side bars etc should still be very thin to match the originals. I was fearing ending up with fat wooden bars but Mark took me to see a previous customer and I was happy to see the woodwork there and it put my mind at rest. We went for the thin Krypton windows. Now the windows are in they look very good and match very well. To be fair to everybody, we will not know until the winter how well they remedy our warmth and condensation issues in the house but are confident we made the right choice. Other suppliers would not do separate window panes and instead would only do a large window with a false wooden strip down the middle to make them look like two. We did not want that. The carpenters, Steve and Gary turned up on time (early actually) and got on with the job very efficiently and left no mess behind. I am very happy with the company and the windows.
Natasha Birley
Mark and his team are amazing. They restored our sash windows and doors. Mark is really knowledgeable and passionate and explained the process to me so I knew exactly what they would be doing. Once the work commenced I was amazed by how well they draft proofed the windows. They took so much care and the guys were polite, tidy, timely and a joy to have around. I would absolutely recommend the team to anyone thinking of restoring their windows, they look AMAZING!
Rachael Smith
Absolutely outstanding quality, value for money and service from Rob. This is the second time Rob has done work for us and we can highly recommend him. The sash windows are like new! Thanks Rob 😀
Jon Reed
Used these guys to do a total refurbishment on the windows of my 1870s Victorian Villa style house. Incredibly happy with the work and the guys doing it are just superb. On time to the minute every day, clearly take pride in the work they do and super friendly. Would not hesitate to use again!
Geoff Parsons
Excellent service from Mark. The windows installed last week. Look elegant and noise reduced considerably.
S Attewell
Very pleased, very sound work done, very professional and friendly team. Highly recommended!!