Greater London · England
Window Mastic in West Kensington
Window mastic for West Kensington, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Untidy mastic left by window fitters
- Water coming in at the bottom corners of a door
- Cracked sealant at the sill ends
DIY versus a professional finish
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Window mastic in West Kensington
Homes in West Kensington have every kind of window: from uPVC casements to timber and aluminium, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We work on uPVC windows, window sills and composite doors, and the jobs we see most are hard, cracked sealant around windows and rushed sealant from a window installation.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Location
- West Kensington (W14, SW6, SW5)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it generally takes most of a day for a typical house, less for a few frames. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in West Kensington. It helps if you can point us to a visitor permit or a bay close to the door.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Before we arrive
- Let us know about earlier repairs to the joints
- Move anything stored near the joints
- Tell us if parking is tricky
Get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will explain what’s involved and give you a clear price.
Related advice
Looking after it afterwards
Looking after new joints is easy:
- Clean frames with a soft cloth and soapy water
- Check the mastic once a year
- Keep paint and stain on wooden frames in good order
- Keep solvents and bleach off the sealant
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
Water trapped behind a failed joint can start rot in timber frames and sills. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
Places near West Kensington
What else we do in West Kensington
FAQs for West Kensington
Do you work for landlords with property near Kensington Olympia station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just phone 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Do you cover West Kensington for window mastic?
Yes, West Kensington is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Can new window sealant be painted?
Not generally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Can you do the inside joint as well?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
Is it messy?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
How long will my window job take?
The work takes anything from an hour or two to a full day, depending on how many frames there are. Access and how stubborn the old mastic is affect the time most.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint.
How we quote for window mastic
Jobs vary more than people expect. The main factors:
- Whether there’s mould to deal with
- The amount of work
- How many rooms, windows or areas are involved
- Any working-time requirements on site
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- How we’d reach the joints
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
Need a quote? Please phone 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Frames and glazing around West Kensington
With historic houses such as Garden Lodge (about 0.4 miles north-east) nearby, there’s older building stock in the area around West Kensington 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 London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
Rented homes near Kensington Olympia station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. West Kensington is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
West Kensington is about 1 mile south of Kensington, in Greater London. We carry out window mastic for homeowners, landlords and businesses in West Kensington and the surrounding area, as part of our work across Greater London. West Kensington is one of 764 places in Greater London where we work for window mastic.
All of W14, SW6 and SW5 is within our area for window mastic. Streets in the area include Sun Road, Star Road and Field Road, all of which we cover. We also cover North End (1 mile west), Brook Green (1 mile north-west), Fulham (1 mile south), Hammersmith (1 mile west) and Brackenbury Village (1 mile north-west). Larger places within reach include London (5 miles east), City of Westminster (3 miles north-east), Marylebone (3 miles north-east), St Pancras (5 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (10 miles north-east).
Landmarks near West Kensington
We work in homes and buildings around Avonmore Primary School, Gwendwr Garden and Seven Stars pub, among other places. The nearest railway station is Kensington Olympia station, roughly 0.5 miles north. Nearby you’ll also find Chelsea Stadium Tour And Museum (1 mile south-east) and Fulham Hospital (0.6 miles south-west). Green spaces nearby include Campden Hill and The Long Water.
Do you need window mastic in West Kensington?
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, so it comes away long before its time.
Most people get in touch after spotting one of these:
- Cracked sealant at the sill ends
- Hard, cracked sealant around windows
- Rushed sealant from a window installation
- Water coming in at the bottom corners of a door
Schools such as The Fulham Boys School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- Whether they seal over old material or remove it
- How long the guarantee is
- What insurance they hold
- What happens if the job turns out different
Honest limits
We won’t take on work that won’t last, so here’s what sealant can’t put right:
- Rotten timber, which needs a joiner first
- Damp problems in the wall away from the window
- Condensation trapped between the panes
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly.
What we seal
- Aluminium frames
- Timber windows & doors
- Window sills
- Composite doors
- uPVC windows
- Patio & French doors
What the job involves on each surface
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. If we find rot, we will tell you before going ahead, as a joiner will need to deal with it.
Composite doors
An exposed front door gets wind-driven rain, and the top and bottom corners tend to fail first. We pay most attention there.