Sash Window Repairs & Replacement in London
Period sash windows are worth keeping. We repair cords, pulleys and weights, ease sticking sashes, fit draught proofing and replace cracked panes in the original frames.
Repair before replace
Most sashes can be saved. We only recommend replacement when the timber is beyond repair.
Draught proofing
Brush seals fitted into the frame stop rattles and draughts without changing how the window looks.
Sympathetic to period homes
Glass, beading and paint finishes chosen to match the original window.
Options for listed and conservation properties
Repair, slim units and secondary glazing can all be options. Any planning or conservation approval needs to be confirmed with your council.
Repairs to existing sash windows
Broken cords, dropped sashes, rattles, sticking runs, draughts and cracked panes are all repairable in place in most cases, keeping your original windows.
- Cords, pulleys and weights rebalanced
- Brush draught proofing routed into the existing sash
- Cracked or misted panes replaced in the original finish
- Localised timber repair where rot is limited
Replacement sashes in your existing boxes
Where the outer box frame is sound but the sliding sashes are beyond repair, new sashes can be made to match and fitted into the existing box.
- New sashes made to match the original profile and glazing bars
- Existing box frame kept, so less disruption and decoration
- Single, slim double glazed or laminated glass depending on the property
- Painted finish agreed before the sashes are made
Complete sash window replacement
When the box frame and sill have gone, a full replacement window is the sensible route. We survey, order and manage the installation.
- Full survey and measure before anything is ordered
- Timber or UPVC sliding sash options
- Old window removed and taken away
- Reveals made good ready for your decorator
Glazing upgrades where suitable
Not every sash can take double glazing. Where the sash is deep enough, slim units can be an option, and secondary glazing is an alternative where the window itself must stay as it is.
- Slim double glazed units where the sash depth allows
- Acoustic laminated glass for noisy roads
- Internal secondary glazing as a non-invasive option
- Suitability confirmed at survey, not over the phone
Sash windows in pictures
Illustrative images showing the types of glazing we supply and install.
How it works
- 1
Send photos of the window and tell us what it is doing - sticking, rattling, dropped or draughty.
- 2
We survey on site and quote for repair, replacement glass or a new sash.
- 3
Repairs are carried out in place where possible, with minimal mess.
- 4
We check the balance, ease the runs and leave the window working smoothly.
Where we cover
Based at 4 Glengall Road, Kilburn NW6. We cover Kilburn, Hampstead, Camden, Maida Vale, Willesden, Queen's Park and the rest of London, and travel further for larger jobs.
See all areasWhat you can rely on
- Family-run business, established in Kilburn.
- Free quotations with no call-out charge.
- Public liability insurance on every job.
- Written quotes - lead times and terms stated up front.
- We use quality materials and finish every job properly. If anything is not right with our work, call us and we will come back and put it right.
- Shop open Monday to Saturday, 8am - 5pm. Emergency phone line answered 24 hours a day, 7 days a week.
Common questions
My sash will not stay up - can it be fixed?
Almost always. That is usually a broken cord or a weight that has come off, and it is a straightforward repair.
Can you draught proof without replacing the window?
Yes. Brush seals are routed into the existing sash and frame and are barely visible once painted.
I live in a conservation area - what are my options?
Repair, slim double glazed units or internal secondary glazing are the usual routes. What is permitted depends on your property and your council, so please check with them before ordering - we will talk through the options.
Do you replace broken sash glass?
Yes, including patterned and obscure glass, finished in the original putty or bead detail.
Ready for a price?
Send a few photos and rough sizes and we will come back with a clear written quote.