Greater London · England
Window & door mastic in Coombe Hill, Greater London
Mastic around window and door frames, sills and patio doors for homes and businesses in Coombe Hill and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps where the sill meets the wall
- Rushed sealant from a window installation
- Sealant in the wrong colour for the frame
About our window mastic in Coombe Hill
Whether it’s one leaking patio door or every frame on the house, you will get a clear quote before work begins. Just ring 0345 464 0079 or drop us an email and tell us how many frames there are and how they’re reached for window mastic in Coombe Hill. If you have sealant in the wrong colour for the frame and mastic that’s falling out in pieces, we can help.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
You’re covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or send us an email.
- Location
- Coombe Hill (SW15, KT2)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so we use a flexible, low-modulus sealant. We match white, brown, anthracite grey and black frames.
Composite doors
A composite door normally sits in a plastic outer frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
Signs you need window mastic in Coombe Hill
On timber frames, paint and putty build up around the joint. Mastic painted over many times cracks with the paint, and timber moves with moisture as well as temperature.
Most people get in touch when they notice something like this:
- Black, perished sealant on frames
- Mastic that has split away from the wall
- Sealant in the wrong colour for the frame
- Untidy mastic left by window fitters
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.
Comparing quotes
- How long the guarantee is
- Which colour the sealant will be
- Whether they seal over old material or remove it
- Who turns up on the day
What affects the quote in Coombe Hill
Every job gets its own quote. These are the things that affect it:
- Any mould that needs treating
- How many rooms, windows or areas are involved
- How much old sealant there is and how hard it is to remove
- The size of the job
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, ring 0345 464 0079 or email us and we will give you an honest view and a quote.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- Photos by email, if that’s easy
- Whether it has been sealed before
- The rough size of the job
- What’s wrong with the joints now
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Look round the frames every year or so
- Paint up to the joint, not over it
- Keep paint and stain on wooden frames in good order
- Make sure the drainage slots aren’t blocked
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
What we do, step by step
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. It normally takes a few hours for a handful of frames, longer for a whole house. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
How to prepare
- On commercial sites, let us know about site rules
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
How to get a quote
Getting a quote is simple: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we’ll take it from there.
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Also near Coombe Hill
Other services in Coombe Hill
What window mastic looks like in Coombe Hill
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Pembroke Lodge (about 1.5 miles north-west) nearby, there’s older building stock in the area around Coombe Hill 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.
Coombe Hill is in London, so parking needs planning: let us know about parking bays, permits or a driveway. Homes close to St John the Baptist include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Coombe Hill is about 2 miles north-east of Kingston upon Thames, in Greater London. Anywhere in SW15, we cover window mastic for homes and businesses. Our Greater London coverage runs to 764 places, and Coombe Hill is one of them. You can also see our page for London, about 9 miles away.
All of SW15 and KT2 is covered for window mastic. If you need window mastic at a property on Keswick Avenue, Derwent Avenue and Robin Hood Lane or anywhere close by, we can help. Being close to the A308, Coombe Hill is easy for our applicators to reach. If you’re just outside Coombe Hill, we cover Kingston Vale (1 mile east), Putney Vale (1 mile east), Coombe (1 mile south), Norbiton (2 miles south-west) and Motspur Park (2 miles south-east). We also work in nearby towns such as London (9 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).
Near you in Coombe Hill
Around Coombe Hill, our work takes us to homes and buildings near Coombe Girls' School, Canbury School and Richmond Park. The closest station to Coombe Hill is Norbiton station, about 1.6 miles south-west of the centre. Well-known places in the area include Bentall Centre (2.2 miles south-west) and Kingston Hospital (1.4 miles south-west). For a walk, there’s Kingston Hill Road area and Fishpond Wood and Beverley Meads.
Landlord and commercial work in Coombe Hill
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
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 that we can handle for you.
Your questions about window mastic in Coombe Hill
I let a flat near Norbiton station. Can you help?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Is Coombe Hill in your area for window mastic?
Yes. We work across London and the South East, and Coombe Hill is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
How long does it take to reseal the windows on a house?
A few frames take a few hours, while a whole house takes longer. You will get a timescale with the quote.
Where do you work from?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
What does window mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before work begins.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
Do you remove the old sealant?
Yes, always, and completely. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Why act early in Coombe Hill
Redecorating is a good moment to renew the mastic. Fresh joints finish the job neatly. In a flat in Coombe Hill, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
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 you get with us
- Old sealant always removed completely
- Approved under the ARBOMaster scheme
- Over 20 years’ experience
- Colour picked to suit the job
See our cost guide or our reviews.