Greater London · England
External Mastic in Chinbrook
Movement joints in Chinbrook need attention? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Sealant that has lost its bond to the brick or render
- Joints with sealant missing in places
- Rain getting behind render or cladding at a joint
External mastic in Chinbrook, done properly
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. We work on façade panels, concrete & block and copings & trims, and people most often call us about movement joints with cracked, split or missing sealant and gaps where render, brick and frames meet.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so one failed joint can cause damp for more than one household. For a flat in Chinbrook, check the lease for who looks after the outside.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Chinbrook (SE9, SE12, BR1)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
A little care helps the new joints last. Our advice:
- Never let anyone fill a movement joint with mortar
- Deal with leaking gutters that soak the joints below
- Do not let climbing plants root in the sealant
- Tell anyone working on the walls about the movement joints
Only paint over the joint if we have confirmed the sealant can take paint. Paint can crack on a flexible joint.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
Chinbrook buildings and the weather
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. Historic houses like Eltham Palace (about 1.3 miles north-east) are a reminder that the area around Chinbrook has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
As a London address, Chinbrook can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. If you live in an older home near Jubilee International Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. If you let a flat or house near Grove Park station, split movement joints are easy to miss on a rental until damp shows inside.
Chinbrook is about 1 mile south-west of Eltham, in Greater London. Jobs in Chinbrook get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Chinbrook is one of 764 places in Greater London where we work for external mastic. Our London page covers work nearby.
Jobs for external mastic in SE9, SE12 and BR1 is quoted and booked the same way as anywhere else. Local streets include Luffman Road, Riddons Road and Cobland Road, and we cover them all. You will find Chinbrook on the A2212, which makes it straightforward to reach with everything needed for external mastic. Close by, we work in Mottingham (1 mile north-east), Grove Park (1 mile west), Coldharbour (1 mile east), Middle Park (1 mile north) and Sundridge (1 mile south). We also work in nearby towns such as London (7 miles north-west), City of Westminster (10 miles north-west), Marylebone (10 miles north-west), Kensington (11 miles north-west), St Pancras (9 miles north-west) and Shoreditch (8 miles north-west).
Around Chinbrook
Locally, jobs take us to homes and businesses close to Colfe's School, Chinbrook Meadows and Haberdashers' Aske's Knights Academy. There’s a railway station in Chinbrook itself: Grove Park station. Other landmarks nearby include Prefab Museum (1.5 miles west) and Greenwich Castle (3.5 miles north-west). Green spaces nearby include Summer Hill and The Tarn.
Questions from Chinbrook
Is parking a problem for a job in Chinbrook?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Can you help a landlord with a rental near Grove Park station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
How do you reach high-level joints?
That depends on the building and the joints. Where joints can be reached safely, we will do them. Tell us about the building and we’ll confirm what access is needed.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you will get one quote.
How long does external mastic take?
That depends on how much there is to do, but as a guide it takes a few hours for a handful of joints, longer for a whole elevation. We will give you a better idea when we quote.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. Then phone 0345 464 0079 or drop us an email.
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Subsidence or other structural problems
- Render that’s blown, hollow or coming away
- Walls that need new movement joints cut into them
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly before booking.
What we seal
- Joints between brick and frames
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Concrete & block
- Copings & trims
What the job involves on each surface
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. We choose the product to suit.
What affects the quote in Chinbrook
There’s no set price list, because jobs vary so much. What we look at:
- Whether the work is at height
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
Doing several joints on one visit is normally more efficient than separate visits. You will get one clear quote for the whole job.
Asking for a quote
You do not need to know the technical terms. Just tell us:
- Access, such as stairs, a lift or height
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
Need a quote? Please ring 0345 464 0079 or email us with a few details. We’ll explain what we’d do and send you a clear quote before we start.
Landlord and commercial work in Chinbrook
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
Also near Chinbrook
Also in Chinbrook
How it works
You don’t need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the work takes anything from a few hours to several days, depending on the building in most cases. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Tell us about any water getting in
- Tell us about any previous sealing or DIY attempts
- Tell us if parking is tricky
Get a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.