Greater London · England
External & façade joints in Lambeth, Greater London
External mastic in Lambeth from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Panel joints letting water in
- Hard, crazed mastic that has stopped moving
- Joints with sealant missing in places
What happens on the day
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. In Lambeth, 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.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- Let us know about stairs, lifts or work at height
- Try not to wet indoor joints just before the visit
- Move anything stored near the joints
Get a quote
For external mastic in Lambeth, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before we start.
Related advice
How we handle external mastic in Lambeth
On houses, flats and commercial buildings across Lambeth, we reseal joints in brickwork, render, cladding and façade panels. The preparation is the same whatever the wall: clean joint faces and the right depth. If you have brick movement joints where the sealant has split and weathered mastic that no longer stretches, we can put it right.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so a leaking gutter joint or failed wall joint can affect more than one home. For a flat in Lambeth, check the lease for who looks after the outside.
Each job carries a 12-month guarantee, large or small.
- Place
- Lambeth (SE11, SW1P, SW8)
- Region
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How to look after the new joints
A little care helps the new joints last. We recommend:
- Tell anyone working on the walls about the movement joints
- Make sure movement joints are not pointed over
- Keep water from gutters off the wall
- Check external joints each spring
Keep pressure washers away from the sealant. High-pressure water can lift the edges and let water in behind.
Act while the splits are small. At that stage it’s a simple cut out and reseal before water has had years to get in.
Walls and rooflines in Lambeth
In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Schools such as Vauxhall Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Lambeth is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Lambeth is about 1 mile south-west of London, in Greater London. Whether you’re in the middle of Lambeth or further out, we cover external mastic for every kind of property. Lambeth is one of 764 towns and villages in Greater London we cover for external mastic.
All of SE11, SW1P and SW8 is covered for external mastic, from the main roads to the quietest streets. Whether your property is on Gibson Road, Langley Lane and Randall Road or anywhere close by, our applicators can take on the job. Lambeth is on the A3203 and A3204, which makes it straightforward to reach with everything needed for external mastic. We also cover Vauxhall (1 mile north), Kennington (1 mile south), Oval (1 mile south), Newington Butts (1 mile east) and St George's Fields (1 mile north-east). We also work in nearby towns such as Kensington (4 miles west), Shoreditch (3 miles north-east), Walthamstow (8 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles north-east) and Hampstead (5 miles north-west).
Local landmarks in Lambeth
Typical jobs here are in homes near The Jolly Gardeners pub, Old Paradise Gardens and Lambeth Palace Library and the streets around them. Nearby too are Lambeth School of Art (under half a mile south) and Lilian Baylis Technology School (less than half a mile south). Lambeth has its own railway station: Vauxhall station. Other landmarks nearby include Newport Street Gallery (less than half a mile north-east) and Evelina London Children's Hospital (0.5 miles north). Not far away are Bellenden Road Nature Garden and Ludgate Hill.
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Also in Lambeth
Why act early in Lambeth
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner so it’s worth doing right. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Lambeth.
Combining jobs into one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Why Lambeth customers choose us
- Every job guaranteed for a year
- Neat joints and a tidy finish
- Trusted Arbo and Everbuild sealants
- Fully insured
See our cost guide or what customers say.
Lambeth: your questions answered
Do you cover Lambeth for external mastic?
Yes, Lambeth is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing.
Is parking a problem for a job in Lambeth?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
How long does the job take?
That depends on how much there is to do, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We’ll tell you when we quote.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
What does external mastic cost?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or send us an email with a short description of the job.
Do you work for landlords and businesses?
Yes, we do. We work in homes, commercial premises and hotels, and we are fully insured.
When something else is needed
We will not take on work that won’t last, so these are the limits:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Movement that’s more than a sealant joint can take
- Cutting new joints into brickwork, which is building work rather than sealant work
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
Surfaces we seal
- Concrete & block
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
Signs you need external mastic in Lambeth
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
It’s worth asking for a quote if you see:
- Failed seals between different materials
- Leaking joints around cladding and façade panels
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
For an older house near a landmark such as St Peter's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Comparing quotes
- What preparation is included
- When the joint can take water or movement
- What happens if they find a problem under the old sealant
- What the quote includes, VAT included or not
Landlords, agents and businesses in Lambeth
If you manage several properties in or around Lambeth, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.