Greater London · England
Kingston Vale External Mastic
External mastic in Kingston Vale from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Movement joints filled with mortar instead of sealant
- Failed seals between different materials
- Sealant that has lost its bond to the brick or render
External mastic for homes and businesses in Kingston Vale
On houses, flats and commercial buildings across Kingston Vale, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. Common call-outs are for leaking joints around cladding and façade panels and gaps where render, brick and frames meet, across joints between brick and frames, copings & trims and concrete & block.
Outside work in London starts with access: side passages, upper floors and where to park. For a home in Kingston Vale, tell us how high the joints are and how to reach the back of the building.
All of our work is guaranteed for twelve months.
- Where
- Kingston Vale (SW15, KT2, SW20)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What external mastic looks like in Kingston Vale
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts.
In the older streets around St John the Baptist, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near Raynes Park station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Kingston Vale is about 2 miles west of Wimbledon, in Greater London. We carry out external mastic for homes and businesses in Kingston Vale and the surrounding area. 764 places in Greater London are on our list, large and small. There’s also a page for London, roughly 8 miles from Kingston Vale.
All of SW15, KT2 and SW20 is covered for external mastic. Whether your property is on Keswick Avenue, Derwent Avenue and Robin Hood Lane or a nearby road, we can help. Kingston Vale is on the A308, which makes it straightforward to reach. Neighbouring places we cover for external mastic 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). We also work in nearby towns such as 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).
Local landmarks in Kingston Vale
Typical jobs here are in homes near The Norwegian School in London, Hall School Wimbledon and Duke of Cambridge pub, among other places. For rail, the closest station is Raynes Park station, about 1.7 miles south-east of the centre. Well-known places in the area include Bentall Centre (2.6 miles south-west) and Wimbledon Windmill Museum (1 mile north-east). For a walk, there’s Fishpond Wood and Beverley Meads and Kew Gardens Lake.
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Do you need external mastic in Kingston Vale?
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
It’s worth asking for a quote if you see:
- Brick movement joints where the sealant has split
- Rigid filler in a joint that should flex
- Moss and dirt in joints with no sealant left
- Gaps where render, brick and frames meet
For site and facilities teams at buildings such as Robin Hood Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Before you book anyone
- Whether VAT is included
- How much experience the applicator has
- What product goes in the joint
- What guarantee comes with the work
What the job involves on each surface
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joint sealant has to cope with frequent movement. The sealant is chosen with that in mind.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. They’re resealed over backing rod with a low-modulus sealant.
Landlord and commercial work in Kingston Vale
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Looking after it afterwards
So the new joints stay in good condition:
- Get split or bare joints resealed while the damage is small
- Leave the joints unpainted unless we’ve said otherwise
- Deal with leaking gutters that soak the joints below
- Keep high-pressure jets off the joints
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.
What affects the cost of external mastic
We quote each job individually. These are the things that affect it:
- The number and length of the joints
- The type of sealant required
- Working hours on commercial sites
- Any mould that needs treating
Doing several joints on one visit is normally 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.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- The type of property
- How many joints, rooms or windows are involved
- If someone has resealed it before
- The problem you’ve noticed
If you’re in Kingston Vale and need external mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.
Places near Kingston Vale
Other services in Kingston Vale
How the visit works
We keep the work tidy and contained to the joints we’re treating, so you can get on with your day. Expect the work to take a few hours to a few days, depending on the length of joint and the access. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Clear the area around the work
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
Ask for a quote
Want a quote for external mastic? Please ring 0345 464 0079 or send us an email with a few details. We’ll explain what we’d do and send you a clear quote before any work starts.
Related advice
Kingston Vale questions
Can you help a landlord with a rental near Raynes Park station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Is parking an issue for external mastic in Kingston Vale?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. Exterior sealants come in a good range of colours.
How long does external mastic take?
Most jobs take a few hours to a few days, depending on the length of joint and the access. Your quote will say how long we expect yours to take.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages to suit the site.
Can you do several jobs on one visit?
Of course. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
Is it OK to fill a movement joint with cement?
No. Cement or mortar cannot stretch. Where a joint has been mortared, it can often be raked out and sealed properly.