Greater London · England
Window Mastic in Kensal Town
Mastic around window and door frames, sills and patio doors in Kensal Town, with a 12-month guarantee on every job. Ask us for a quote.
- Gaps where the sill meets the wall
- Hard, cracked sealant around windows
- Gaps between the frame and the inside reveal
Honest limits
In fairness, there are a few things sealant will not fix:
- A sash or casement that will not close properly
- Soft or decayed wood in the frame
- Draughts through the window seals rather than the frame
If you’re not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Surfaces we seal
- Window sills
- Patio & French doors
- Timber windows & doors
- Aluminium frames
- Composite doors
- uPVC windows
Window mastic in Kensal Town, done properly
Homes in Kensal Town have every kind of window: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We work on composite doors, window sills and uPVC windows, and people most often call us about gaps left after new windows were fitted and draughts coming in around windows and doors.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, which is when draughts and damp patches appear in homes in Kensal Town.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Kensal Town (W10, W9, W11)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
Landlords and letting agents in Kensal Town can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for.
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.
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Clear any debris from frame drain holes
- Keep timber frames painted
- Ventilate rooms so frames do not stay wet inside
- Keep jet washers away from the mastic
Have a look at the joints once a year, ideally after winter. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just ring 0345 464 0079 or send us an email.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
How the job changes by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so they get particular care.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
Why act early in Kensal Town
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why book with us
- Domestic, commercial and hotel work
- Rated 4.9 stars on Google
- Tidy, careful work
- Anti-fungal silicone where joints get wet
Read what affects the cost or what customers say.
What we do, step by step
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours for a few frames, or a day or more for a whole house. In a London area like Kensal Town, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
How to get a quote
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Advice
Places near Kensal Town
What else we do in Kensal Town
Window mastic in Kensal Town: local notes
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Kensington Palace (about 1.6 miles south-east) nearby, there’s older building stock in the area around Kensal Town as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
As a London address, Kensal Town can be tricky for parking: let us know about parking bays, permits or a driveway. For landlords with property near Queens Park (London) station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Homes close to St Thomas Kensal Town include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
Kensal Town is about 2 miles north of Kensington, in Greater London. Jobs in Kensal Town get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Kensal Town is one of 764 places in Greater London we cover for window mastic.
Jobs for window mastic in W10, W9 and W11 works the same way as everywhere else we cover. Whether your property is on Peach Road, Parry Road and Barlby Road or anywhere close by, our applicators can take on the job. You’ll find Kensal Town on the A4207, which makes it straightforward to reach with everything needed for window mastic. We also cover North Kensington (1 mile west), Notting Dale (1 mile south), Kensal Rise (1 mile north-west), Queen's Park (1 mile north-east) and Kensal Green (1 mile north-west). We also work in nearby towns such as London (5 miles east), City of Westminster (3 miles east), Marylebone (3 miles east), St Pancras (4 miles east), Shoreditch (6 miles east) and Walthamstow (9 miles north-east).
Landmarks near Kensal Town
Typical jobs here are in homes near All Saints Catholic College, Emslie Horniman's Pleasance and Maida Vale School, among other places. The closest station to Kensal Town is Queens Park (London) station, about 0.7 miles north. A little further out are Westfield London (1.2 miles south-west) and Paddington General Hospital (0.5 miles east). Not far away are Campden Hill and Greville Place nature reserve.
Kensal Town: your questions answered
Can you do window mastic in Kensal Town?
Yes. We work across London and the South East, and Kensal Town is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Can parking be tricky for a visit in Kensal Town?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Can I paint over the new sealant?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Do you guarantee window mastic?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Can I add another job to the visit?
Yes. Just list everything you need.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.