Sash Window Restoration

Breathing life back in to your sash windows

Sash Window Restoration


Traditional sash windows add beautiful charm and character to period properties however, over the years issues can develop which can make living with your sash windows less comfortable.


Whether you’re suffering with rattles and draughts, rotten frames, broken sash cords or cracked glazing, we are on hand to help. We can even double-glaze your existing windows without replacing the box frame.

Some of the most common sash window problems that we can help with –


  • Sashes which have been painted shut
  • Rotten and leaking frames and cills
  • Excessive condensation
  • Sashes which drop when opened
  • Cracked, scratched or misted glass
  • Broken sash cords
  • Windows which rattle or are draughty allowing heat to escape
  • Defective pulley wheels and locks


Enjoy a warmer, quieter, and cosier home with our unique perimeter draught seal system.

Sash window repairs, overhauls and upgrade including the installation of our unique perimeter draught seal system.

The perfect solution for listed buildings


The installation of our unique perimeter draught seal system can reduce heat loss around your windows significantly. As well as eliminating rattles, the overhaul process will ensure that your windows glide effortlessly within the existing box frames as would have originally been intended whilst reducing outside noise pollution and dirt ingress.


Our English Heritage-approved perimeter draught seal system was specifically designed to bring traditional windows into the 21st century without compromising the traditional character and charm of the windows.


The discreet and aesthetically pleasing perimeter draught seal system can be installed into windows within a conservation area or listed building without the requirement for planning permission.


As part of your sash window overhaul the windows will also benefit from re-balancing with new sash chords and replacement staff and parting beads to match the originals, this helps to improve the internal appearance of your windows. Replacement lockable sash fasteners and lifts will be installed as well as security restrictors where required.

This was the fourth project in which we have employed JTP Joinery for sash window refurbishment and replacement works with 3 of these projects being within the Exeter area. Having worked with several of the national companies in the past, the benefits of using a local specialist are clear to see. The project management and H&S awareness have been excellent throughout each of the projects.

Contractor, Winslade Park

Double glazing your existing sash windows, including the installation of our unique perimeter draught seal system

The cost effective solution for conservation areas


It has long been thought that to have double glazed sash windows would mean replacing the entire window which can be costly and disruptive to your home, here at JTP Joinery we have an innovative solution to this.


We are able to manufacture replacement sashes (the moving parts) that fit within your existing box frames, replicating the finer details such as glazing bars and decorative horns. The new sashes will incorporate Slim line heritage double glazing to maintain the character and charm of your windows whilst vastly improving your heat retention.


Our slim line heritage double glazed units come with warm edge super spacer bars as standard, Argon gas and employ the latest Planitherm glass technology for maximum thermal efficiency.


Your replacement sashes can be manufactured from a range of timbers to suit all requirements and budgets from Scandinavian Redwood to Solid Hardwood although our recommended timber is usually Accoya.


All replacement sashes will have 2 coats of micro porous paint applied prior to installation.

JTP Joinery made and fitted replacement sash for several windows, plus repairs to some of the frames. Very pleased with the quality of the new windows, and the remarkably short time it took to make them. Jack and Herbie did a fine job on-site and left everything tidy. This is the second time they have done work for me, and I would happily recommend them.

Andrea Atkin

Timber repair work


Where individual window components are rotten such as a window cill or a bottom rail we can scarf in new timber or replace the entire component with an exact replica. This service could be required in conjunction with the services above or as a stand-alone project.


Where your windows are showing significant signs of rot or decay you could be advised that the window is beyond economical repair, in which case we would offer a replacement window solution that is in keeping with the age and character of your home.

Sash Window Restoration FAQ’s

Where are the windows/sashes made?

All of our windows are manufactured in our Newton Abbot workshop by our time served craftsmen to each individual specification.

I am within a conservation area/listed building can you help?

Our surveyors have extensive experience in dealing with local authorities and are well equipped to advise you of the restrictions and advise of the best course of action for your windows. Our surveyor will assist and guide you through the application should Listed Building Consent be required for replacement windows or double glazing. In most cases we can overhaul windows and install our perimeter draught seal system without the requirement for any form of consent.

Can works be carried out during the winter months?

All of our services are carried out year-round with every care taken to minimise disruption to your home. During the winter months our teams set up gazebo’s to shelter from the rain and protect the windows as required.

How disruptive will the works be?

We always aim to keep disruption to a very minimum to ensure the process is as enjoyable and hassle free as possible. Our installers will always cover all furniture within each room and also apply carpet protector throughout all walkways and working areas. All power tools use portable dust extraction, and our team will always hoover up at the end of each day. As with any home improvement works being carried out an element of disruption and dust is inevitable however, we aim to leave your home as clean and tidy as it was when we arrived.

Do you offer services which cover the replacement or refurbishments of other types of windows and doors?

We have a wide range of services available including the manufacture, installation and refurbishment of all types of timber windows and doors including casement windows, stable doors, french doors and bi folding doors.

What are the benefits of the perimeter draught seal system?

There are several benefits of the perimeter draught seal system with the most notable benefits being the vast improvement in heat loss, the elimination of rattles, the improvement of sound insulation and the reduction in dirt ingress. Another benefit is the very noticeable difference in how the window operates. With the sashes running on back to back brush seals they will glide effortlessly within the box frame.

Should I be replacing my timber windows?

This is something that will be discussed by our surveyor during the initial site visit. If your windows are repairable then we would always opt for one of our overhauling, draught proofing or double glazing options as these will cause far less disruption to your home whilst also saving a considerable amount of money.

Do you carry out works for commercial clients?

We can manufacture, install and refurbish windows for commercial clients, of course. We have built up an enviable reputation locally with many contractors and developers. All of our site teams hold current CSCS cards along with other relevant H&S certification such as Asbestos Awareness and First Aid. As a company we are SMAS accredited. Please see our Commercial and professional page for more information

Can I get free advice and a free of charge quotation?

All of our quotations are free of charge and come with no obligation to buy our products or services. Our surveyors will always give you honest advice and advise of the most cost effective service to suit your individual needs.

Need help with your sash windows?


Simply click to get in touch with one of the JTP Team.
We’ll be delighted to help and assist you with your requirements!