Greater London · England
External Mastic in Shepherd's Bush
External mastic for Shepherd's Bush and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Moss and dirt in joints with no sealant left
- Panel joints letting water in
- Damp patches traced to an open external joint
External mastic in Shepherd's Bush
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. If you have damp patches traced to an open external joint and cracked joints where brick meets render or frames, we can put it right, whatever the surface.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so one failed joint can cause damp for more than one household. In a converted house in Shepherd's Bush, it’s worth checking who is responsible for the outside before booking.
Big or small, it’s backed by our one-year guarantee in Shepherd's Bush and across Greater London.
- Place
- Shepherd's Bush (W12, W11, W14)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours to a few days, depending on the length of joint and the access. In Shepherd's Bush, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- On commercial sites, let us know about site rules
- Mention any parking rules near the property
- Keep children and pets away from the work area
Ask for a quote
To get a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.
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Towns and villages near Shepherd's Bush
What else we do in Shepherd's Bush
Walls and rooflines in Shepherd's Bush
Historic houses like Leighton House (about 0.9 miles south-east) are a reminder that the area around Shepherd's Bush has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking.
Letting a property close to Shepherds Bush station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around Shepherd's Bush Tabernacle, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Shepherd's Bush is about 1 mile west of Kensington, in Greater London. If you need external mastic in Shepherd's Bush, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover Greater London from our Crawley base. Across Greater London, we cover 764 places, Shepherd's Bush among them.
Every address in W12, W11 and W14 is within our area for external mastic, from the main roads to the quietest streets. Local streets include Bard Road, Stowe Road and Wells Road. Shepherd's Bush sits on or near the A402. We also cover the places around Shepherd's Bush: White City (1 mile north), Holland Park (1 mile east), Notting Hill (1 mile north-east), Kensington (1 mile east) and Notting Dale (1 mile north-east). Larger places within reach include London (5 miles east), City of Westminster (3 miles east), Marylebone (3 miles east), St Pancras (5 miles east), Shoreditch (6 miles east) and Walthamstow (10 miles north-east).
What’s near Shepherd's Bush
Around Shepherd's Bush, our work takes us to homes and buildings near The Cardinal Vaughan Memorial RC School, Corona Theatre School and Polish Library POSK in London. You will also find Hammersmith Park (0.5 miles north-west) and The Central Bar (less than half a mile east). Shepherd's Bush has its own railway station: Shepherds Bush station. Well-known places in the area include West 12 Shepherds Bush (within half a mile east) and Culture House (within half a mile west). Open spaces near Shepherd's Bush include WWT London Wetland Centre and The Long Water.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Cracked brickwork or render that needs a builder or plasterer
- Damp that is not coming from the joint
- Subsidence or other structural problems
If you’re not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
Where we work in Shepherd's Bush
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Façade panels
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
We work for landlords and letting agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Common problems we fix in Shepherd's Bush
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
Common reasons people contact us include:
- Sealant pulling away from one side of the joint
- Movement joints with cracked, split or missing sealant
- Cracked joints where brick meets render or frames
- Weeds or debris growing in open joints
As a London address, Shepherd's Bush can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- What insurance they hold
- How the joint is cleaned and prepared
- What product goes in the joint
- What happens if they find a problem under the old sealant
Different surfaces, different methods
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod coloured to suit the wall.
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Your questions about external mastic in Shepherd's Bush
Is parking a problem for a job in Shepherd's Bush?
Parking in Shepherd's Bush, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do you cover Shepherd's Bush for external mastic?
Yes. Our work covers London and the South East, and Shepherd's Bush is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing.
Can tenants book the work?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Can you work on commercial sites?
Yes. Larger jobs can be planned room by room or area by area.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin from the range available.
What is a movement joint?
Walls move with heat, cold and moisture, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
What sealant do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
What affects the cost of external mastic
Jobs vary more than people expect. The main factors:
- The type of sealant required
- Working hours on commercial sites
- Any mould that needs treating
- The old material and how stubborn it is
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
There’s no need for technical detail. Just tell us:
- Photos by email, if that’s easy
- The type of property
- The address or postcode of the job
- Roughly how big the job is
Asking for a quote is easy: let us know what needs doing and where. Photos by email help us understand the job.