Greater London · England
Teddington External Mastic
Movement joints in Teddington need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Failed sealant between panels on a façade
- Joints with sealant missing in places
- Sealant pulling away from one side of the joint
About our external mastic in Teddington
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We take the old material out and do it properly. If you have sealant pulling away from one side of the joint and weathered mastic that no longer stretches, we can help, on render & cladding joints, brickwork movement joints and joints between brick and frames alike.
Newer London blocks are built with movement joints in brick and render, and with cladding joints sealed with mastic. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall.
Whatever the size of the job, it’s backed by our one-year guarantee in Teddington and across Greater London.
- Place
- Teddington (TW11, TW12, TW2, TW1)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Your questions about external mastic in Teddington
Can parking be tricky for a visit in Teddington?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Is Teddington in your area for external mastic?
Yes. We work across London and the South East, and Teddington is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Pointing it stops it working, and the wall may crack nearby. We will reseal it with a flexible sealant.
Do you guarantee your work?
Yes, always. There’s a 12-month guarantee on every job, large or small.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
How long should I leave it?
Different products cure at different speeds, so follow the cure time we give you when we finish.
Do you work for letting agents?
Yes, regularly. We can quote for several properties at once.
Will there be a smell?
Possibly a little. It fades as the sealant cures.
Towns and villages near Teddington
Also in Teddington
What affects the quote in Teddington
We quote each job individually. This is what makes a difference:
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
- Mould in or behind the old joints
- The type of sealant required
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first and agree the price before starting.
What we need to know
When you call or email, it’s useful to know:
- Where the job is, and your postcode
- If someone has resealed it before
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Act on the first splits you see
- Do not let climbing plants root in the sealant
- Check the sealant is paintable before painting near it
- Fix overflowing gutters above sealed joints
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
How it works
You do not need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the work takes anything from a few hours to several days, depending on the building in most cases. In Teddington, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for 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
- Let us know about parking restrictions
- Where the joints are inside, avoid wetting them before we arrive
- Clear the area around the work
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
Read more
When something else is needed
To be straight with you, some problems need a different trade:
- Subsidence or other structural problems
- Cracks in the bricks or render themselves, away from the joints
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Where we work in Teddington
- Concrete & block
- Façade panels
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
Common problems we fix in Teddington
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, and it tears off the sides.
Most people get in touch when they notice something like this:
- Movement joints with cracked, split or missing sealant
- Gaps where render, brick and frames meet
- Damp patches traced to an open external joint
- Failed sealant between panels on a façade
Homes close to Christ Church include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Questions to ask before booking
- Is the old sealant removed completely?
- What insurance they hold
- Whether VAT is included
- What product goes in the joint
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Different surfaces, different methods
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
Walls and rooflines in Teddington
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 Strawberry Hill House (about 0.8 miles north) nearby, there’s older building stock in the area around Teddington as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
As a London address, Teddington can be tricky for parking: let us know about parking bays, permits or a driveway. Schools such as St Mary's and St Peter's Church of England Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Teddington is about 5 miles west of Wimbledon, in Greater London. Jobs in Teddington get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Across Greater London, we cover 764 places, Teddington among them. There’s also a page for London, roughly 11 miles from Teddington.
We work across TW11, TW12, TW2 and TW1 for external mastic. If you need external mastic at a property on Station Road, High Street and Church Road or anywhere close by, we can help. Teddington is on the A311 and A313, which makes it straightforward to reach. We also cover Strawberry Hill (1 mile north), Fulwell (1 mile north-west), Hampton Hill (1 mile west), Ham (1 mile north-east) and Eel Pie Island (1 mile north). Further out, we also cover London (11 miles north-east), City of Westminster (10 miles north-east), Marylebone (10 miles north-east), Kensington (8 miles north-east), St Pancras (12 miles north-east) and Shoreditch (13 miles north-east).
Landmarks near Teddington
Locally, jobs take us to homes and businesses close to Bushy Park, Turing House School and Newland House School, among other places. There’s a railway station in Teddington itself: Teddington station. A little further out are Teddington Memorial Hospital (under half a mile west) and Eel Pie Island Museum (1.5 miles north). Not far away are Ham Lands and Kew Gardens Lake.