Greater London · England
External Mastic in Newington Butts
Sealing brickwork movement joints, render, cladding and façade joints for Newington Butts, backed by a one-year guarantee. Call for a quick quote.
- Joints pointed up with cement by mistake
- Failed sealant between panels on a façade
- Gaps where render, brick and frames meet
How we handle external mastic in Newington Butts
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. Typical jobs include gaps where render, brick and frames meet and failed sealant between panels on a façade, across render & cladding joints, brickwork movement joints and joints between brick and frames.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Newington Butts, 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 one-year guarantee.
- Where
- Newington Butts (SE1, SE17, SE11)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What we are called out for in Newington Butts
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
Signs it’s time to call us include:
- Sealant pulling away from one side of the joint
- Failed seals between different materials
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
If you look after a building such as London College of Communication, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What to look for in a quote
- How hidden problems are handled
- Whether they seal over old material or remove it
- How the surfaces are prepared before sealing
- How long to leave it before use
Places near Newington Butts
Also in Newington Butts
FAQs for Newington Butts
Can you help a landlord with a rental near Elephant & Castle station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Do you cover Newington Butts for external mastic?
Yes, Newington Butts is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
How long before the joint can be used?
That depends on the sealant used, so follow the cure time we give you when we finish.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
What is backing rod for?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
What is a movement joint?
Brickwork, render and cladding all move a little, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
Should I try DIY first?
You can, for simple jobs. 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.
When will the joints need doing again?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away and have them redone then.
Newington Butts buildings and the weather
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Newington Butts is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you live in an older home near Metropolitan Tabernacle, an extension built onto an older house moves differently, and the joint between them takes the strain.
Newington Butts is about 1 mile south-west of London, in Greater London. Jobs in Newington Butts get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our Greater London coverage runs to 764 places, Newington Butts among them.
We cover every part of the SE1, SE17 and SE11 postcode area for external mastic and the streets around it. If you need external mastic at a property on Dante Road, Oakey Lane and Ash Avenue or a nearby road, we can help. You’ll find Newington Butts on the A302 and A3202, which makes it straightforward to reach. If you’re just outside Newington Butts, we cover Elephant and Castle (1 mile north), St George's Fields (1 mile north-west), Vauxhall (1 mile west), Lambeth (1 mile west) and Kennington (1 mile south-west). Larger places within reach include City of Westminster (3 miles north-west), Marylebone (3 miles north-west), Kensington (4 miles west), Walthamstow (7 miles north-east), Hoxton (3 miles north) and Hampstead (5 miles north-west).
Near you in Newington Butts
In Newington Butts, that means homes and buildings near Elephant and Castle pub, Lambeth Palace Library and Crampton Primary, among other places. You’ll also find Notre Dame Roman Catholic Girls' School (within half a mile north-west) and Newington Gardens (less than half a mile north-east). There’s a railway station in Newington Butts itself: Elephant & Castle station. A little further out are The Walworth Clinic (within half a mile south-east) and Baynard's Castle (1.3 miles north). The countryside around Newington Butts includes Bellenden Road Nature Garden and St. James's Park Lake.
Aftercare tips
A little care helps the new joints last. Our advice:
- Keep high-pressure jets off the joints
- Tell anyone working on the walls about the movement joints
- Keep movement joints as flexible joints, not mortar
- Get split or bare joints resealed while the damage is small
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead and let water in behind.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. In London conversions, one flat’s bathroom is often above another flat’s ceiling, 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 for homes in Newington Butts.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What you get with us
- Any old sealant cut out fully, not covered over
- Anti-fungal silicone where joints get wet
- A 12-month guarantee on all work
- 20+ years of sealant experience
Take a look at what affects the cost or customer reviews.
What we cannot put right
Sealant isn’t the answer to every problem, and we’ll tell you before we start. Sealant will not put right:
- Cracked brickwork or render that needs a builder or plasterer
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Render that’s blown, hollow or coming away
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before booking.
Where we work in Newington Butts
- Joints between brick and frames
- Render & cladding joints
- Façade panels
- Concrete & block
- Brickwork movement joints
- Copings & trims
Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, 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.
What affects the cost of external mastic
Every job gets its own quote. This is what makes a difference:
- The number and length of the joints
- The old material and how stubborn it is
- How many areas need sealing
- Whether the work is at height
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Ask us for a quote and we’ll explain what it covers.
What to tell us for a quote
When you contact us, it’s useful to know:
- The type of property
- Roughly how big the job is
- Pictures of the joints, sent by email
- The address or postcode of the job
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or drop us an email and describe the job, and pictures are welcome.
How the visit works
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and tidy away. It usually takes a few hours for a handful of joints, longer for a whole elevation. In Newington Butts, 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 checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
How to prepare
- For business premises, tell us about site rules or sign-in
- Keep children and pets away from the work area
- Let us know about parking restrictions
Get a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work and send you a clear quote.