Greater London · England
Window & door mastic in Barnes, Greater London
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in Barnes. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic that has split away from the wall
- White mastic on grey or black frames
- Gaps left after new windows were fitted
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. We can quote a run of properties together.
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.
Window mastic for homes and businesses in Barnes
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through and quietens the whistle on windy days. If the draught is through the window seals instead, we will tell you. Typical jobs include whistling draughts around closed windows and white mastic on grey or black frames, on uPVC windows, aluminium frames and timber windows & doors.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Barnes is something to talk through when you book.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Location
- Barnes (SW13, SW15, SW14)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What else we do in Barnes
What we’re called out for in Barnes
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar didn’t grip properly, and it lets go sooner than it should.
Signs it’s time to call us include:
- Mastic that has split away from the wall
- Old mastic that has gone black or come away
- Water coming in at the bottom corners of a door
- Leaking joints at the ends of sills
As a London address, Barnes can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- Is the old sealant removed completely?
- What the cure time is
- How the surfaces are prepared before sealing
- Whether they’re fully insured
What affects the quote in Barnes
Call for a quick quote. The main things that affect it are:
- The type of sealant required
- Whether there’s mould to deal with
- The number and length of the joints
- The number of rooms or windows
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What to tell us for a quote
You do not need to know the technical terms. Just tell us:
- What’s wrong with the joints now
- Whether it’s a home or a business
- Where the job is, and your postcode
- Pictures of the joints, sent by email
We do not publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or email us.
When something else is needed
It helps to know what we cannot do too:
- Condensation trapped between the panes
- Broken hinges, locks or handles
- Rotten timber, which needs a joiner first
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before you book.
Where we work in Barnes
- Patio & French doors
- Composite doors
- Window sills
- Timber windows & doors
- uPVC windows
- Aluminium frames
The process
There’s no need to move everything out, just the space around the work. We protect the rest, and the work takes most of a day for a typical house, less for a few frames for a typical job. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We start by checking each window and door with you.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Clear items away from the joints we are working on
- Keep pets and children clear of the area while we work
- Let us know about stairs, lifts or work at height
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Related advice
Windows and doors in Barnes
Historic houses like Chiswick House (about 0.9 miles north-west) are a reminder that the area around Barnes has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as St Osmund's Catholic Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Homes close to Barnes Methodist Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Barnes is about 2 miles west of Fulham, in Greater London. For window mastic in and around Barnes, it’s easy to get a quote: please call 0345 464 0079 or email us. We cover Greater London from our Crawley base, Barnes included. Across Greater London, we cover 764 places, Barnes among them. You can also see our page for London, roughly 7 miles from Barnes.
Our applicators cover all of the SW13, SW15 and SW14 postcode area for window mastic. You will find streets such as Church Road, Station Road and Barnes High Street. Barnes is on the A306 and B349, so it’s easy for us to get to with everything needed for window mastic. Nearby, we also carry out window mastic in Old Chiswick (1 mile north), Turnham Green (1 mile north-west), Mortlake (1 mile south-west), East Sheen (1 mile south-west) and Putney (1 mile south-east). We also work in nearby towns such as London (7 miles east), City of Westminster (5 miles north-east), Marylebone (5 miles north-east), Kensington (3 miles north-east), St Pancras (7 miles north-east) and Shoreditch (8 miles north-east).
Around Barnes
Typical jobs here are in homes near Chiswick School, Sun Inn and Barn Elms and the streets around them. You will also find Polish Library POSK in London (1.4 miles north) and The Harrodian School (0.6 miles north). There’s a railway station in Barnes itself: Barnes Bridge station. Nearby you will also find Barnes Hospital (0.7 miles south-west) and Putney Exchange (1.4 miles south-east). For a walk, there’s Richmond Hill and Kew Gardens Lake.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Look round the frames every year or so
- Do not use solvent cleaners on the joint
- Keep jet washers away from the mastic
- Wash the frames with mild soapy water
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
Leaks generally show up in wet, windy weather, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
Barnes: your questions answered
Do you work for landlords with property near Barnes Bridge station?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Do you cover Barnes for window mastic?
Yes, Barnes is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
What information do you need?
A short description and the location, with pictures by email if possible. We’ll ask anything else we need to know.
Do you guarantee window mastic?
Yes. Our one-year guarantee covers every job.
Can you reach windows above the ground floor?
Generally, yes. We plan safe access before the job.
Do you have insurance?
Yes, we’re fully insured for every job we do.
What does window mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or send us an email with a short description of the job.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Can I do it myself?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.