18 February 2026
At SashWise, we understand that deciding on the right solution for your timber sash windows can often feel daunting and overwhelming.
With over 20 years of experience in the timber window industry we are on hand to provide practical and relevant information and support.
Whether you live in a Victorian terrace cottage, a Georgian townhouse, or an apartment within a converted Edwardian building, this simple quiz is designed to provide clarity and guidance on the most appropriate route forward for your windows.
a) Structurally sound, but draughty and rattle in the wind
b) The paintwork has deteriorated and there are visible signs of timber rot
c) There is significant condensation on the glass
d) The windows allow a high level of outside noise into the property
a) Some of the sash cords are broken, and the windows do not open and close properly
b) I am concerned issues with the windows may be highlighted during a future property sale
c) Heat loss and rising energy bills
d) Future-proofing the property and reducing long-term maintenance costs
a) Yes, they have been professionally painted and maintained
b) Only DIY repairs have been carried out
c) Not since we moved into the property
d) The original timber windows have been replaced with aluminium or uPVC windows
a) Cost
b) Concern about loosing the original character and period features
c) Worry about mess and disruption to the interior of the property
d) The property is in a conservation area, and I am unsure about planning permission
a) Improving comfort and eliminating draughts
b) Long-term peace of mind
c) Reducing energy costs and improving efficiency
d) Installing low-maintenance windows
Your timber sash windows are likely structurally sound but suffering from common wear and tear. A professional service combined with a discreet draught-proofing system can dramatically improve comfort, reduce rattling, and eliminate cold air infiltration.
Draught-proofing sash windows is often the most cost-effective way to restore performance while retaining the original features of your period property.
A superb job from start to finish. The pricing was sensible; timing agreed and met; installers arrived on time every day and worked hard through the day; they cleaned up each day; the quality of workmanship was excellent. I wholeheartedly recommend this company - I am sure you will not be disappointed if you use them.
If your windows show signs of deteriorating paintwork or timber rot, a full restoration may be the best route forward. This involves stripping back the windows to the original wood, repairing and damaged timber, re-sealing the glass into the frames and painting the windows throughout to protect them for years to come.
Alongside this the original windows would be fully draught-proofed, new sash cords fitted as well as new window furniture and security locks.
Restoration preserves the original features while addressing structural concerns, making it ideal for heritage homes and listed buildings.
Cannot recommend highly enough. Made our old sash windows look as new for a lot less than having new windows. Everything you want from a service.
If condensation and heat loss are your main concerns, retaining and restoring the original sash boxes, and fitting new timber double glazed sashes within them, could be the perfect balance.
This approach is a popular option for homeowners seeking to improve thermal efficiency and reduce energy bills, without the expense and disruption of full window replacement.
SashWise have carried out three jobs for us over the past few years as we have gradually refurbished and retrofitted our Windows. The team have been a pleasure to work with, and the standards of craftsmanship have been extremely high, including replicating the decorative design of our Edwardian windows. I would have no hesitation recommending SashWise to family and friends.
If exceptional performance and minimal ongoing maintenance are your priorities, complete replacement with new Accoya timber double glazed sash windows may be the most appropriate solution.
This option offers maximum energy efficiency, improved acoustic insulation and low ongoing maintenance.
With all of our new sash windows we take great care to match the intricate design and detailing of the original windows, thereby preserving the aesthetic character of your home.
SashWise have replaced over 20 cold and noisy single glazed sash windows with new like-for-like replicas with double glazing and modern insulation. The new windows look fantastic, the quote was reasonable with no additional charges, and the team worked extremely quick and cleanly. This is the second job that I have appointed SashWise for, and I would not hesitate to appoint hem again in the future. Great work!
At SashWise we understand every property is unique, and the condition of timber sash windows can vary significantly even within the same street.
If you would like tailored advice on whether repair, restoration, draught-proofing, or replacement is the the right solution for your home, our friendly team would be delighted to help.
Contact SashWise today to arrange a professional assessment and discover the best long-term solution for your sash windows.
