Greater London · England
External & façade joints in Kennington, Greater London
Problem with your movement joints in Kennington? We cut out the old, prepare the joints and apply the right sealant.
- Leaking joints around cladding and façade panels
- Rain getting behind render or cladding at a joint
- Rigid filler in a joint that should flex
Outside joints around Kennington
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. With historic houses such as Buckingham Palace (about 1.7 miles north-west) nearby, there’s older building stock in the area around Kennington as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
For an older house near a landmark such as Calvary Church of God in Christ, older walls, gutters and the joints where extensions meet them need a flexible sealant. For landlords with property near Vauxhall station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Kennington is about 2 miles south-west of London, in Greater London. From the centre of Kennington to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Across Greater London, we cover 764 places, and Kennington is one of them.
Postcode districts we cover here for external mastic: SW8, SW1P and SE11. That includes homes and businesses on Kay Road, Lett Road and Rita Road and the roads around them. Kennington is on the A203 and A3204, which makes it straightforward to reach with everything needed for external mastic. Nearby, we also carry out external mastic in Oval (1 mile north), South Lambeth (1 mile south-west), Little Portugal (1 mile south), North Brixton (1 mile south-east) and Vauxhall (1 mile north). Larger places within reach include City of Westminster (3 miles north-west), Marylebone (3 miles north-west), Kensington (4 miles west), St Pancras (3 miles north), Shoreditch (4 miles north-east) and Walthamstow (8 miles north-east).
Near you in Kennington
In Kennington, that means homes and buildings near St Peter's School, Archbishop Tenison's Church of England School and Lambeth Palace Library. Nearby too are Crown and Thistle pub (under half a mile south-west) and Vauxhall Park (under half a mile north-west). There’s a railway station in Kennington itself: Vauxhall station. A little further out are Baynard's Castle (2.2 miles north) and Type Museum (0.5 miles south). Not far away are Bellenden Road Nature Garden and Ludgate Hill.
External mastic in Kennington, done properly
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where mortar or filler would crack. We are often asked to deal with panel joints letting water in and joints where the bead has come unstuck, on façade panels, render & cladding joints and copings & trims.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in Kennington, tell us how high the joints are and how to reach the back of the building.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or send us an email.
- Location
- Kennington (SW8, SW1P, SE11)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When it is not the sealant
A few problems are outside what sealant work can do:
- Subsidence or other structural problems
- Cracking across the wall rather than at a joint
- Rising or penetrating damp from elsewhere in the wall
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Façade panels
How it works
At the end, we look at the finished work together and explain the cure time. The work normally takes anything from a few hours to several days, depending on the building, depending on the size of the job. In Kennington, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- 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.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
- Mention any parking rules near the property
Ask for a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or drop us an email.
Related advice
Places near Kennington
Also in Kennington
Common problems we fix in Kennington
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it cannot stretch and tears as soon as the joint widens.
Any of these means the joints need attention:
- Rain getting behind render or cladding at a joint
- Gaps where render, brick and frames meet
- Failed sealant between panels on a façade
- Old sealant gone brittle and cracked
Schools such as St Stephen's Church of England Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
What your quote should include
- Are they insured?
- How the colour is chosen
- What preparation is included
- What happens if the job turns out different
Quotes for external mastic in Kennington
Jobs vary more than people expect. The main factors:
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
- The number and length of the joints
- How many rooms, windows or areas are involved
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
Helping us quote
What to tell us when you ask for a quote:
- Photos by email, if that’s easy
- The type of property
- Access, such as stairs, a lift or height
- Whether it has been sealed before
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work and give you a clear price.
What the job involves on each surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Kennington: your questions answered
Can you do external mastic in Kennington?
Yes. Our work covers London and the South East, and Kennington is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Is parking an issue for external mastic in Kennington?
Parking in Kennington, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Will there be a smell?
Possibly a little. It fades as the sealant cures.
Can tenants book the work?
Yes, but check with your landlord or agent first. Landlords are often happy for the work to be arranged.
How long does the job take?
That depends on how much there is to do, but most jobs take a few hours to a few days, depending on the length of joint and the access. We’ll give you a better idea when we quote.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. We’ll talk through colour options before we start, matched as closely as the range allows.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render, so the damage spreads beyond the joint. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and give you a clear quote before work begins.
Why book with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Tidy, careful work
- 20+ years of sealant experience
- Fully insured
Take a look at what affects the cost or our reviews.