Greater London · England
External & façade joints in West Barnes, Greater London
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in West Barnes and across Greater London. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Cracked joints where brick meets render or frames
- Joints with sealant missing in places
- Sealant that has lost its bond to the brick or render
Walls and rooflines in West Barnes
Historic houses like Southside House (about 1.1 miles north) are a reminder that the area around West Barnes has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts.
For an older house near a landmark such as Holy Cross, an extension built onto an older house moves differently, and the joint between them takes the strain. Schools such as Sacred Heart Catholic Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
West Barnes is about 2 miles south-west of Wimbledon, in Greater London. For external mastic in and around West Barnes, please phone 0345 464 0079 or email us for a quick quote. We’re based in Crawley and cover Greater London, West Barnes included. West Barnes is one of 764 towns and villages in Greater London we cover. There’s also a page for London, about 9 miles away.
We cover every part of the KT3 and SW20 postcode area for external mastic and the streets around it. Streets in the area include Queens Road, Blakes Lane and Egmont Road. If you are just outside West Barnes, we cover Raynes Park (1 mile north-east), Motspur Park (1 mile north-west), Bushey Mead (1 mile north-east), Cannon Hill (1 mile east) and New Malden (1 mile west). Further out, we also cover London (9 miles north-east), City of Westminster (9 miles north-east), Marylebone (9 miles north-east), Kensington (7 miles north), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
Landmarks near West Barnes
In West Barnes, that means homes and buildings near Beverley Park, The Fountain pub and Ursuline Preparatory School, among other places. West Barnes has its own railway station: Motspur Park station. Nearby you’ll also find Bentall Centre (2.9 miles west) and Chessington Castle Hill (3.7 miles south-west). Green spaces nearby include Kingston Hill Road area and Derwent Floodwash.
External mastic in West Barnes, done properly
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we will confirm what access is needed. Typical jobs include old sealant gone brittle and cracked and rain getting behind render or cladding at a joint, across copings & trims, façade panels and joints between brick and frames.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In West Barnes, joints up high may need ladders or other access, which is worth talking through when you book.
Whatever the size of the job, you get the same 12-month guarantee in West Barnes and across Greater London.
- Location
- West Barnes (KT3, SW20)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens if it’s left?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. A stiffer product can damage the joint edge as it fails. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Call for a quick quote and we’ll go through it with you.
What you get with us
- Trusted Arbo and Everbuild sealants
- Homes, businesses and hotels
- White, clear, grey or coloured to suit, where the product allows
- Anti-fungal silicone where joints get wet
Take a look at how sealant jobs are priced or what customers say.
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
What affects the cost of external mastic
There’s no set price list. The quote depends on:
- Mould in or behind the old joints
- How much there is to do
- When we can work, for business premises
- Which sealant suits the joint
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Asking for a quote
When you contact us, it’s useful to know:
- The address or postcode of the job
- What’s wrong with the joints now
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we’ll take it from there.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Keep water from gutters off the wall
- Have failed joints looked at early
- Never let anyone fill a movement joint with mortar
- Check the sealant is paintable before painting near it
Don’t let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
When to call us in West Barnes
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and tears as soon as the joint widens.
If you can see any of these, it’s time to have the joints looked at:
- Failed seals between different materials
- Weathered mastic that no longer stretches
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
Letting a property close to Motspur Park station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Comparing quotes
- Whether all the old sealant comes out first
- How long the guarantee is
- How the joint is cleaned and prepared
- When the joint can take water or movement
How the visit works
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it normally takes a few hours to a few days, depending on the length of joint and the access. For a job in West Barnes, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Clear the area around the work
- Mention any tricky access
- For business premises, tell us about site rules or sign-in
Get a quote
For a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear price before any work starts.
Read more
Places near West Barnes
What else we do in West Barnes
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Common questions in West Barnes
Can you do external mastic in West Barnes?
Yes, West Barnes is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
I let a flat near Motspur Park station. Can you help?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Do you do commercial work?
Yes. We have worked for hotels, offices and other businesses, and we’re fully insured.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Are you fully insured?
Yes. We’re fully insured.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can you do several jobs on one visit?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.