Greater London · England
External & façade joints in Single Street, Greater London
External mastic for Single Street and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Weathered mastic that no longer stretches
- Movement joints filled with mortar instead of sealant
- Failed seals between different materials
How we handle external mastic in Single Street
For buildings in Single Street, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. If you’re dealing with hard, crazed mastic that has stopped moving and water getting into walls through failed joints, we can help, whatever the surface.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Single Street, joints up high may need ladders or other access, which is worth talking through when you book.
Big or small, it’s backed by our 12-month guarantee in Single Street and across Greater London.
- Place
- Single Street (TN16)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Keep movement joints as flexible joints, not mortar
- Have failed joints looked at early
- Keep high-pressure jets off the joints
- Show decorators and builders where the movement joints are
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
A joint that has stopped moving pushes the movement elsewhere, generally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Places near Single Street
What else we do in Single Street
For landlords and businesses
We also work for property managers and facilities teams in Single Street and across Greater London. We can quote a run of properties together, and we are fully insured for the work.
If you manage several properties in or around Single Street, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
FAQs for Single Street
Is parking a problem for a job in Single Street?
Parking in Single Street, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Can you help a landlord with a rental near Chelsfield station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover Single Street?
Yes. We work in Single Street and the rest of Greater London. For a quote, ring 0345 464 0079 or email us.
Do you guarantee your work?
Yes. All our work carries a 12-month guarantee.
Do you work at height?
That depends on the building and the joints. We work on joints that can be reached safely. Give us some details and we will confirm the access.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
Are you insured?
Yes, we are fully insured for domestic and commercial work.
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.
Why act early in Single Street
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. 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.
What you get with us
- Old sealant always removed completely
- Sealant colour chosen to suit
- Neat joints and a tidy finish
- We are fully insured
Take a look at our cost guide or customer reviews.
What we do, step by step
You do not need to clear the whole room or building, only the area right around the joints. We protect the rest, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Single Street. A visitor permit or a nearby bay makes the visit run more smoothly.
- Each joint is checked and the colour of the new sealant agreed.
- 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.
Getting ready for the visit
- Tell us if parking is tricky
- Keep children and pets away from the work area
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Read more
Common problems we fix in Single Street
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.
These are the problems we are asked about most:
- Moss and dirt in joints with no sealant left
- Rain getting behind render or cladding at a joint
- Hard, crazed mastic that has stopped moving
- Cracked joints where brick meets render or frames
Rented homes near Chelsfield station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Before you book anyone
- Whether all the old sealant comes out first
- Who does the work, and how experienced they are
- What the cure time is
- The length of the guarantee
How we quote for external mastic
Every job gets its own quote. These are the things that affect it:
- How many rooms, windows or areas are involved
- How much old sealant there is and how hard it is to remove
- The number and length of the joints
- Whether there’s mould to deal with
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Asking for a quote
Before you ask for a quote, have a think about:
- The problem you’ve noticed
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Whether it has been sealed before
For external mastic in Single Street, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
What we can’t put right
It helps to know what we can’t do too:
- Render that is blown, hollow or coming away
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracking across the wall rather than at a joint
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Where we work in Single Street
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Joints between brick and frames
Walls and rooflines in Single Street
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. Historic houses like Down House (about 1 mile north-west) are a reminder that the area around Single Street 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 the older streets around Church of St Peter and St Paul, old and new materials meet at the roofline and walls, which is where sealant earns its keep. If you look after a building such as Cudham Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Single Street is about 5 miles south of Orpington, in Greater London. From the centre of Single Street to the outskirts, we cover external mastic for every kind of property. Our Greater London coverage runs to 764 places, Single Street among them. We also work in London, about 14 miles from Single Street.
Here we cover the TN16 postcode area for external mastic. We cover properties on Berry's Hill and Single Street and the roads around them. Other places close to Single Street include Berry's Green (1 mile south), Luxted (1 mile north-west), Cudham (1 mile east), Aperfield (1 mile south-west) and Horns Green (1 mile south-east). Larger places within reach include London (14 miles north-west), Whitechapel (15 miles north-west), Stockwell (13 miles north-west), Orpington (5 miles north), Wimbledon (14 miles north-west) and Plaistow (14 miles north).
Landmarks near Single Street
In Single Street, that means homes and buildings near Charles Darwin School and The Old Jail Public House, among other places. For rail, the closest station is Chelsfield station, about 3.3 miles north-east of the centre. Well-known places in the area include Princess Royal University Hospital (3.3 miles north) and Crofton Roman Villa (3.9 miles north). Not far away are Betsom's Hill and Downe Bank.