Greater London · England
Window Mastic in Kingston Vale
Window mastic in Kingston Vale from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked internal joints between frame and plaster
- White mastic on grey or black frames
- Old mastic that has gone black or come away
Window mastic in Kingston Vale, done properly
Colour matters on a frame. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. We work on aluminium frames, patio & French doors and uPVC windows, and common reasons people get in touch are cracked internal joints between frame and plaster and mastic that’s falling out in pieces.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease generally says who is responsible for the windows, so it’s worth checking before booking.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Place
- Kingston Vale (SW15, KT2, SW20)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Kingston Vale
For a quick quote, just ask. The main things that affect it are:
- Whether the work is at height
- The size of the job
- The number of rooms or windows
- Mould in or behind the old joints
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
What to tell us for a quote
To help us quote quickly, please include:
- How we’d reach the joints
- Whether it’s a home or a business
- If someone has resealed it before
- Where the property is
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Landlords, agents and businesses in Kingston Vale
Letting agents often deal with us directly. Tell us the address, the job and how access works.
If you manage several properties in or around Kingston Vale, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
What happens on the day
Good joint work is mostly preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a few frames, or a day or more for a whole house. In Kingston Vale, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Clear items away from the joints we are working on
- Mention if the joints have been sealed before
Get a quote
We quote each job on its own, so the first step is telling us about yours. Just ring 0345 464 0079 or send us an email with the details.
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Kingston Vale questions
Can you help a landlord with a rental near Raynes Park station?
Yes, we work for landlords and agents. Just call 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Do you cover Kingston Vale for window mastic?
Yes. We work across London and the South East, and Kingston Vale is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear quote.
Will new mastic stop draughts?
Yes, where the draught is at the frame edge. We find where the air is coming from before we reseal.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Do I have to be there?
It depends on the job. For work indoors, someone needs to let us in.
Can you seal the gap between the frame and the plaster indoors?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
Can I paint over the new sealant?
It depends on the sealant. Silicone is not paintable, but some hybrid sealants are. Tell us if you are decorating and we will choose accordingly.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Signs you need window mastic in Kingston Vale
Joint shape matters as much as the product. A skim of sealant over a wide gap soon tears, and a gap filled solid can’t flex. That is what backing rod is for.
Most people get in touch when they notice one of these:
- Damp patches on the reveal after heavy rain
- Cold air getting in at the frame edge
- Cracked sealant at the sill ends
- Hard, cracked sealant around windows
For landlords with property near Raynes Park station, renewing tired window mastic between tenants heads off draught and damp complaints.
Questions to ask before booking
- How the surfaces are prepared before sealing
- Which sealant they’ll use, and why
- What the quote includes, VAT included or not
- What insurance they hold
Also near Kingston Vale
More services for Kingston Vale
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Looking after it afterwards
To keep the joints looking good and working properly:
- Clean frames with a soft cloth and soapy water
- Keep paint and stain on wooden frames in good order
- Don’t use solvent cleaners on the joint
- Avoid blasting the frames with a pressure washer
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.
Surface by surface
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We can talk through the options.
Patio & French doors
Door frames take knocks and movement every time the doors are used. The sealant must cope with it without cracking.
Kingston Vale homes and the weather
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. Historic houses like Southside House (about 1.2 miles south-east) are a reminder that the area around Kingston Vale has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
As a London address, Kingston Vale can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Schools such as Robin Hood Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Kingston Vale is about 2 miles west of Wimbledon, in Greater London. If you need window mastic in Kingston Vale, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Greater London from our Crawley base. Our area takes in 764 places across Greater London, large and small. We also work in London, about 8 miles from Kingston Vale.
Postcode districts we cover here for window mastic: SW15, KT2 and SW20. Local streets include Keswick Avenue, Derwent Avenue and Robin Hood Lane. Kingston Vale is on the A308, so it’s easy for us to get to. Other places close to Kingston Vale include Putney Vale (1 mile north), Coombe Hill (1 mile west), Coombe (1 mile south-west), Copse Hill (1 mile south-east) and Crooked Billet (1 mile south-east). Further out, we also cover London (8 miles north-east), City of Westminster (7 miles north-east), Marylebone (8 miles north-east), Kensington (5 miles north-east), St Pancras (9 miles north-east) and Shoreditch (10 miles north-east).
Landmarks near Kingston Vale
Around Kingston Vale, our work takes us to homes and buildings near The Norwegian School in London, Hall School Wimbledon and Duke of Cambridge pub and the streets around them. Kingston Vale’s nearest station is Raynes Park station, roughly 1.7 miles south-east of the centre. Other landmarks nearby include Bentall Centre (2.6 miles south-west) and Wimbledon Windmill Museum (1 mile north-east). Green spaces nearby include Fishpond Wood and Beverley Meads and Kew Gardens Lake.