Sash window draught proofing
Silver Saints draught proof sash windows across London, sealing the perimeter and meeting rail to stop draughts and rattles while keeping the original window working.
Experienced handymen we know, not an app of anonymous bidders.
You get a firm written quote for your windows before any work is booked, so there is no open-ended hourly bill.
Frayed cords renewed at the same visit for £25 plus VAT each. Saturday at the weekday rate.
What we fix
A sash window has to move, so it has gaps by design. Draught proofing closes them with brush pile and compressible seals that still let the sash slide, without replacing the window or changing how it looks.
Draughty sash windows
Cold air round the perimeter and the meeting rail, sealed without replacing the window.
Rattling sashes
Loose sashes that knock in the wind, closed up by the new seals.
A whistling window
Usually the meeting rail, where the two sashes meet.
Brush pile seals
Fitted into the meeting rail and the new parting beads, so the sash still slides.
Top and bottom seals
Hard-wearing compressible seals on the top sash and the lower sash.
Less heat loss and noise
A sealed sash keeps more warmth in and more street noise out.
The sash still works
Draught proofed so it opens and closes as it should, not painted or sealed shut.
Several windows in one visit
A whole house or flat surveyed and quoted together.
Frayed cords renewed
Replaced while the window is apart, for £25 plus VAT per cord.
We work on traditional timber box sash windows, fitting brush pile seals in the meeting rail and parting beads, and compressible seals to the sashes, while keeping the original working sashes.
Different job? For a snapped cord see sash cord replacement, for a modern sash that will not stay up see sash balance repairs, for a sticking sash see shaving swollen doors and windows, and for the front door see draught proofing external doors. Window locks and fasteners can be refitted in the same visit.
What it costs
Windows vary too much in size and condition for a single price, so we survey them first. The £35 plus VAT visit measures and assesses each window, and you then get a fixed written quote before anything is booked.
Prices exclude VAT. The £25 per cord is only for frayed cords renewed while the window is already apart. Snapped cords are priced on our sash cord replacement page.
Our process
About two hours on a standard window. The result is a sash sealed round its perimeter, with the rattle gone and noise resistance improved, and the window still opening and closing as it should.
Meeting rail
The lower sash comes out and a groove is routed into the meeting rail, where the two sashes meet when closed. A brush pile and carrier is fitted into it.
Parting beads
The existing parting beads are removed and replaced with new beads that carry a draught-proofing brush pile.
Top and bottom
A hard-wearing compressible seal goes on the top of the top sash and the bottom of the lower sash.
Reassembled
The window goes back together and any decoration we have disturbed is made good.
If the sash cords are frayed, renewing them while the window is apart is sensible, at £25 plus VAT per cord.
Where we cover
We cover all London boroughs plus the TW, KT, CR and BR postcode areas. Original box sashes are the norm in the Victorian, Edwardian and period conversions of Camden, Islington, Hammersmith and Fulham and Wandsworth, and they are where most London heat goes out of the window. Engineers cross central London by motorcycle and scooter, which means faster arrival and easier parking.
Landlords and letting agents
Draughty, rattling sashes are one of the commonest comfort complaints in period rental stock, and one of the cheapest to fix compared with new windows.
The survey gives you a fixed written quote for every window in the property, so you approve one figure rather than an hourly bill.
Account invoicing and pre-approved spend limits are set out on our landlord services page.
Keep the original windows
Replacing period sashes is expensive, disruptive and often not allowed in a conservation area.
Draught proofing keeps the original timber sashes and frame and adds seals that are barely visible once the window is closed.
For a listed building, confirm consent with your local authority before booking.
Why Silver Saints
We are a managed service, not a bidding app: every Saint is a vetted professional we know personally, not a login on a marketplace.
Draught proofing FAQs
How much does sash window draught proofing cost in London?
It is a fixed-price service. A £35 plus VAT survey and quote visit comes first, then you get a firm written quote for the windows before any work is booked.
How long does it take to draught proof a sash window?
A standard-sized sash window takes about two hours, covering the meeting rail, the parting beads and the seals to the top and bottom of the sashes.
Will draught proofing stop my sash window rattling?
Yes. The brush pile and compressible seals close the gaps the sashes move in, which stops the rattle and improves noise resistance too.
What does the draught proofing process involve?
Silver Saints routes a brush pile into the meeting rail, fits new parting beads with an integral pile, adds compressible seals top and bottom, then reassembles the window and makes good.
Will my sash windows still open after draught proofing?
Yes. The seals are brush pile and compressible strips, so the sashes still slide. They are sealed against draughts, not sealed shut.
Can you draught proof sash windows in a conservation area or listed building?
It keeps the original windows and adds discreet seals, which is usually the preferred approach. For a listed building, confirm consent with your local authority first.
Are you a job-board app like the marketplaces?
We are not a job-board app. Unlike marketplaces that match your job to the cheapest available bidder, Silver Saints contracts its own team of experienced, vetted, multi-skilled tradespeople, people we know personally and work with directly. From booking to billing, you get one accountable service and a real relationship, not an anonymous login from a gig-economy pool.
Do you also replace the sash cords?
Frayed cords can be renewed while the window is apart for £25 plus VAT per cord. For cords that have already snapped, book sash cord replacement instead.
In summary
Silver Saints draught proof sash windows across London to stop draughts, rattles and whistling and reduce heat loss and noise, while keeping the original sashes working. A brush pile is routed into the meeting rail, the parting beads are replaced with new ones carrying a brush pile, compressible seals go on the top and bottom sashes, and the window is reassembled and made good, in about two hours on a standard window. It is a fixed-price service: a £35 plus VAT survey and quote visit, then a firm written quote before any work is booked, with frayed cords renewed at the same visit for £25 plus VAT each. Saturday is the weekday rate. Call 0207 0999 199 or book at https://bookings.silversaints.com.
Sashes draughty or rattling?
Book online or call, and we'll sort it quickly with the Silver Service you deserve. Monday to Saturday, 8am to 5pm.
What's included in the service?
- Professional & Experienced. All our handymen come from multi-trade backgrounds, have decades of experience with sash window repairs & draught proofing, communicate well and understand the importance of customer service.
- Quick Response Times. We can usually offer you Same-day or Next-day appointments.
- Specific Arrival Times. We agree a 60 minute window of arrival time. So no need to wait in all day.
- Silver Service from Booking to Billing. All our work is delivered with unmatched Silver Service.
- Six Day Service. We offer appointments from 08:00-17:00 Monday to Saturday at the same great value rates.
- We've got London Covered. We cover all London as well as TW, KT, CR, BR postal codes.
- All our Work is Guaranteed & Insured. We offer a 12 month guarantee on all labour and parts we supply.
Our fixed price draught proofing service starts with an initial Survey & Quote visit (£35+vat). The Saint will then issue you a formal quote for the draught proofing of your sash windows.
Our Process
The draught proofing process
- Remove the lower sash and route a groove into the meeting rail; fit brush pile and carrier
- Replace parting beads with new parting beads containing brush pile
- Add compressible seals to the top of the top sash and bottom of the lower sash
- Reassemble the window and make good any decorative disturbance
The draught proofing process:
- The lower sash is removed from the frame. A groove is routed into the meeting rail (where the two sashes meet in the closed position) a brush pile and carrier is fitted into the groove.
- The existing parting beads are removed and replaced with new parting beads that contain a draught proofing brush pile.
- A hard wearing compressible seal is added to the top of the top sash and to the bottom of the lower sash.
- The window is then reassembled. Any disturbance we have made to the decoration is made good.
- The end result is a sash window draught proofed around it's perimeters, rattles are eliminated and noise resistance is improved.
- If sash cords are a bit frayed, replacing them while draught proofing is a good idea. Add £25+vat per cord.
- All our Work is Guaranteed & Insured. We offer a 12 month guarantee on all labour and parts we supply.
Our fixed price draught proofing service starts with an initial Survey & Quote visit (£35+vat). The Saint will then issue you a formal quote for the draught proofing of your sash windows.
Meet the Saints
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