Greater London · England
West Brompton Window Mastic
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in West Brompton. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
- Old mastic that has gone black or come away
Why it’s worth doing now in West Brompton
Working on frames from a ladder with a sealant gun is not easy, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in West Brompton, the repair is bigger than the sealant job would have been.
Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why West Brompton customers choose us
- Tidy, careful work
- Trusted Arbo and Everbuild sealants
- Colour picked to suit the job
- We agree the colour with you first
See what affects the cost and customer reviews.
Window mastic in West Brompton, done properly
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. We work on uPVC windows, patio & French doors and composite doors, and people most often call us about leaking joints at the ends of sills and rain getting in at the frame or under the sill.
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 West Brompton is something to talk through when you book.
All of our work is guaranteed for twelve months, in West Brompton and everywhere else we cover.
- Location
- West Brompton (SW6, SW10, SW5)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Frames and glazing around West Brompton
With historic houses such as Garden Lodge (about 0.6 miles north) nearby, there’s older building stock in the area around West Brompton as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
If you look after a building such as St Cuthbert with St Matthias CofE Primary School, larger buildings have plenty of frames, and the mastic around each one ages. In the older streets around Church of St Luke, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
West Brompton is about 1 mile south of Kensington, in Greater London. Jobs in West Brompton get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Across Greater London, we cover 764 places, West Brompton among them.
Our applicators cover all of the SW6, SW10 and SW5 postcode area for window mastic. Local streets include Sun Road, Star Road and Farm Lane, all of which we cover. Main roads around West Brompton include the A3218 and A3220, so getting to you is simple. Nearby, we also carry out window mastic in Earl's Court (1 mile north), Walham Green (1 mile south), World's End (1 mile south-east), Little Chelsea (1 mile east) and South Kensington (1 mile north-east). Within a short drive, we also cover London (4 miles east), City of Westminster (3 miles north-east), Marylebone (3 miles north-east), St Pancras (4 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (10 miles north-east).
Landmarks near West Brompton
Typical jobs here are in homes near The London Oratory School, The Fulham Boys School and Gwendwr Garden and the streets around them. You will also find Natural History Museum Library and Archives (1.1 miles north-east) and Coleherne public house (under half a mile north-east). There’s a railway station in West Brompton itself: West Brompton station. Other landmarks nearby include Kensington Arcade (1 mile north) and Chelsea Stadium Tour And Museum (less than half a mile south-east). Not far away are The Long Water and WWT London Wetland Centre.
Nearby places to West Brompton
Also in West Brompton
Honest limits
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- A frame that has rotted at the joint
- A sash or casement that will not close properly
- Draughts through the window seals rather than the frame
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Joints and surfaces we work on
- uPVC windows
- Composite doors
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- Window sills
What affects the quote in West Brompton
We quote each job individually. These are the things that affect it:
- Which sealant suits the joint
- Any working-time requirements on site
- Access and height
- Any mould that needs treating
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Helping us quote
When you contact us, these details help:
- Whether it’s a home or a business
- The address or postcode of the job
- How many joints, rooms or windows are involved
- If someone has resealed it before
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.
Do you need window mastic in West Brompton?
Mastic ages in the weather. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
Keep an eye out for these signs:
- Cracked internal joints between frame and plaster
- Sealant in the wrong colour for the frame
- Leaking joints at the ends of sills
- Untidy mastic left by window fitters
West Brompton is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Questions to ask before booking
- How much experience the applicator has
- Whether they’re fully insured
- How the joint is cleaned and prepared
- What happens if they find a problem under the old sealant
What the job involves on each surface
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. We’ll point out any rot we find, as that’s a job for a joiner.
Window sills
Sills catch the water running down the glass, so the joints at each end and underneath matter. They’re cut out and resealed with exterior sealant.
FAQs for West Brompton
I let a flat near West Brompton station. Can you help?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Do you cover West Brompton for window mastic?
Yes. We work across London and the South East, and West Brompton is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before resealing.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Are you fully insured?
Yes. Full insurance covers our work.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Can you seal over the old sealant?
No, it won’t last. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Landlord and commercial work in West Brompton
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
What happens on the day
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and tidy away. It usually takes anything from an hour or two to a full day, depending on how many frames there are. In West Brompton, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- 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.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
- Let us know about parking restrictions
How to get a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.