Greater London · England
Window Mastic in Kew
Problem with your window and door frames in Kew? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Whistling draughts around closed windows
- Mastic that has split away from the wall
- Untidy mastic left by window fitters
Window mastic in Kew, done properly
Whether it’s one leaking patio door or every frame on the house, the work is priced before anything is done. Just call 0345 464 0079 or send us an email and tell us how many frames there are and how they’re reached for window mastic in Kew. If you’re dealing with whistling draughts around closed windows and mastic that’s falling out in pieces, we can help, whatever the surface.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Where
- Kew (W4, TW9, TW8)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What window mastic looks like in Kew
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In a converted house or block, who looks after the windows depends on the lease, so check that before booking.
Managing a site like Grove Park Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. Letting a property close to Chiswick station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Kew is about 2 miles south of Acton, in Greater London. From the centre of Kew to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Greater London, we cover 764 places, and Kew is one of them. For nearby work, see our London page.
Here we cover the W4, TW9 and TW8 postcode area for window mastic. Local streets include Kew Road, Maze Road and Kent Road, and we cover them all. Main roads around Kew include the A3000, so getting to you is simple. If you’re just outside Kew, we cover Strand-on-the-Green (1 mile north), Grove Park (1 mile east), North Sheen (1 mile south), Gunnersbury (1 mile north) and Turnham Green (1 mile east). Within a short drive, we also cover London (8 miles east), City of Westminster (6 miles east), Marylebone (6 miles north-east), Kensington (3 miles east), St Pancras (7 miles north-east) and Shoreditch (9 miles east).
Around Kew
In Kew, that means homes and buildings near Library for Iranian Studies, Kew Green and Chiswick School and the streets around them. Other local landmarks include Kew College Prep (under half a mile south-west) and Bull's Head pub (less than half a mile north). The closest station to Kew is Chiswick station, roughly 0.5 miles south-east of the centre. Nearby you’ll also find Livat Hammersmith (2.2 miles east) and Barnes Hospital (1.5 miles south-east). Not far away are Kew Gardens Lake and Duke's Hollow.
Looking after it afterwards
To keep the joints looking good and working properly:
- Keep solvents and bleach off the sealant
- Clean frames with a soft cloth and soapy water
- Keep paint and stain on wooden frames in good order
- Ventilate rooms so frames do not stay wet inside
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so early resealing is worth it.
How it works
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a few frames, or a day or more for a whole house. In Kew, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Mention if the joints have been sealed before
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
Read more
What sealant work cannot fix
We’ll always be straight with you, so here’s what new sealant will not do:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Worn gaskets, brush seals or a door that has dropped
- Penetrating damp from a failed cavity tray or render
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Patio & French doors
- Timber windows & doors
- Aluminium frames
- Window sills
- uPVC windows
- Composite doors
Surface by surface
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. The threshold and the bottom corners take the most water, so we pay close attention there.
Composite doors
Front doors take the weather head on, and the top and bottom corners tend to fail first. We pay most attention there.
Common problems we fix in Kew
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar never bonded as it should, and it lets go sooner than it should.
If you can see any of these, it’s time to have the joints looked at:
- Draughts coming in around windows and doors
- Mastic that is falling out in pieces
- Cracked internal joints between frame and plaster
- Cracked or shrunken mastic around the frame
As a London address, Kew can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- How the surfaces are prepared before sealing
- What the cure time is
- Who does the work, and how experienced they are
- How hidden problems are handled
DIY sealant or a professional job?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
What else we do in Kew
Your questions about window mastic in Kew
Can you help a landlord with a rental near Chiswick station?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Do you cover Kew for window mastic?
Yes. We work across London and the South East, and Kew is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
Can you get sealant to suit coloured frames?
Yes, in most cases. Tell us the frame colour when you get in touch and we’ll use the nearest match.
Do you have insurance?
Yes. We’re fully insured.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used.
Landlord and commercial work in Kew
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Housing providers, facilities teams and property managers book us too in Kew and across Greater London. Several sites can go on one quote.