Greater London · England
Window & door mastic in Kenton, Greater London
Window and door frames in Kenton need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Untidy mastic left by window fitters
- Draughts coming in around windows and doors
- Rain getting in at the frame or under the sill
Window mastic for homes and businesses in Kenton
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. If the draught is through the window seals instead, we’ll tell you. We work on composite doors, timber windows & doors and uPVC windows, and the jobs we see most are sealant in the wrong colour for the frame and gaps left after new windows were fitted.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking, and access in Kenton 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 phone 0345 464 0079 or send us an email.
- Location
- Kenton (HA3, HA7, HA1)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Signs you need window mastic in Kenton
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
Any of these means the joints need attention:
- Leaking joints at the ends of sills
- Rushed sealant from a window installation
- Hard, cracked sealant around windows
- Sealant in the wrong colour for the frame
As a London address, Kenton can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- Are they insured?
- Who turns up on the day
- How hidden problems are handled
- Which colour the sealant will be
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
How the visit works
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the job takes anything from an hour or two to a full day, depending on how many frames there are for a typical job. In Kenton, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- On commercial sites, let us know about site rules
- Keep pets and children clear of the area while we work
- Try not to wet indoor joints just before the visit
Ask for a quote
For window mastic in Kenton, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before we start.
Related advice
When something else is needed
To be straight with you, there are a few things sealant won’t fix:
- Damp coming through the wall itself rather than the frame joint
- A sash or casement that will not close properly
- Soft or decayed wood in the frame
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Window sills
- Timber windows & doors
- uPVC windows
- Patio & French doors
- Aluminium frames
- Composite doors
How the job changes by surface
Patio & French doors
Heavy door frames can move more than windows. A flexible sealant copes with that, where a rigid one would crack.
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We seal the frame and let you know about anything else.
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Window mastic in Kenton: local notes
Historic houses like Headstone Manor (about 2.2 miles west) are a reminder that the area around Kenton 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. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you look after a building such as St Gregory's Catholic Science College, the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Kenton station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Kenton is about 2 miles south of Stanmore, in Greater London. Wherever you are in the HA3 postcode area, we can carry out window mastic at your property. We cover 764 towns and villages across Greater London. Our London page covers work nearby (11 miles or so).
Jobs for window mastic in HA3, HA7 and HA1 is quoted and booked the same way as anywhere else. If you need window mastic at a property on Retreat Close, Kenton Road and Woodgrange Avenue or anywhere close by, we can help. You will find Kenton on the A4006, which makes it straightforward to reach with everything needed for window mastic. Close by, we work in South Kenton (1 mile south), Northwick Park (1 mile south-west), Greenhill (1 mile west), Wealdstone (1 mile north-west) and Harrow on the Hill (2 miles south-west). Within a short drive, we also cover London (11 miles south-east), City of Westminster (8 miles south-east), Marylebone (8 miles south-east), Kensington (7 miles south-east), St Pancras (9 miles south-east) and Shoreditch (11 miles south-east).
Local landmarks in Kenton
In Kenton, that means homes and buildings near Uxendon Manor Primary School, The New Moon pub and Preston Park, among other places. Kenton’s nearest station is Kenton station, roughly 0.5 miles south-west. Nearby you’ll also find St. Anns (1.3 miles west) and Hilfield Castle (4.9 miles north). Not far away are Masons Field and Northala Fields.
How we quote for window mastic
The quote reflects the job in front of us. We look at:
- How easy the joints are to reach
- How much there is to do
- The product the joint needs
- Mould in or behind the old joints
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Where the property is
- Photos by email, if that is easy
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
For a quote, call 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear quote before any work starts.
Places near Kenton
What else we do in Kenton
Kenton questions
Is Kenton in your area for window mastic?
Yes. We work across London and the South East, and Kenton is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
I let a flat near Kenton station. Can you help?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear quote.
Where is Mr Mastic based?
We work from Crawley. We cover Kenton and the rest of Greater London.
Can new window sealant be painted?
Silicone generally won’t take paint. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
Do you work on first-floor windows?
Yes, where they can be reached safely. Tell us about access when you get in touch so we can plan the job.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Can you get sealant to suit coloured frames?
Usually, yes. Tell us the frame colour when you get in touch and we’ll match it as closely as we can.