Greater London · England
External & façade joints in East Dulwich, Greater London
Sealing brickwork movement joints, render, cladding and façade joints in East Dulwich, with a 12-month guarantee on every job. Ask us for a quote.
- Failed seals between different materials
- Weeds or debris growing in open joints
- Joints where the bead has come unstuck
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 so the movement is taken up.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant.
External mastic for homes and businesses in East Dulwich
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall. If you are dealing with gaps where render, brick and frames meet and water getting into walls through failed joints, we can help.
London’s terraces and conversions often share walls, gutters and downpipes with their neighbours, so a leaking gutter joint or failed wall joint can affect more than one home. In a converted house in East Dulwich, it’s worth checking who is responsible for the outside before booking.
We stand behind the work with a one-year guarantee, so you’re covered after we have gone.
- Place
- East Dulwich (SE5, SE22, SE15)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Point out the joints to other trades
- Get split or bare joints resealed while the damage is small
- Leave the joints unpainted unless we’ve said otherwise
- Avoid pressure-washing directly into sealant joints
Only paint over the joint if we have confirmed the sealant can take paint. Many exterior sealants are not designed to be painted, and paint can crack as the joint moves.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick, all bigger jobs than a reseal.
Quotes for external mastic in East Dulwich
We quote each job individually. This is what makes a difference:
- The number and length of the joints
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
- When we can work, for business premises
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- The problem you’ve noticed
- If someone has resealed it before
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved.
Your questions about external mastic in East Dulwich
Do you cover East Dulwich for external mastic?
Yes. Our work covers London and the South East, and East Dulwich is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
Is parking an issue for external mastic in East Dulwich?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges and have them redone then.
Is there a guarantee?
Yes, for a year. If there’s a problem with our work in that time, tell us and we’ll put it right.
Can you match the colour of my brickwork?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We choose the closest to your brick or render so it doesn’t stand out.
How long does the job take?
Most jobs take a few hours for a handful of joints, longer for a whole elevation. Your quote will say how long we expect yours to take.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
How the visit works
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the building. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Clear the area around the work
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
Getting a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or drop us an email.
Related advice
Outside joints around East Dulwich
In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near East Dulwich station, split movement joints are easy to miss on a rental until damp shows inside. In the older streets around The Latter Rain Outpouring Revival Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
East Dulwich is about 3 miles south of London, in Greater London. For external mastic in and around East Dulwich, it’s easy to get a quote: please call 0345 464 0079 or email us. We are based in Crawley and cover Greater London, East Dulwich included. Our Greater London coverage runs to 764 places, East Dulwich among them.
Our applicators cover all of SE5, SE22 and SE15 for external mastic and the streets around it. That includes homes and businesses on Rye Lane, Wren Road and Adys Road and the roads around them. You will find East Dulwich on the A2214 and A2215, which makes it straightforward to reach. We also cover the places around East Dulwich: Denmark Hill (1 mile north-west), Herne Hill (1 mile south-west), Dulwich Village (1 mile south), Camberwell (1 mile north) and Peckham (1 mile north-east). Further out, we also cover London (3 miles north), City of Westminster (5 miles north-west), Marylebone (5 miles north-west), Kensington (6 miles north-west), St Pancras (5 miles north) and Shoreditch (4 miles north).
What’s near East Dulwich
Typical jobs here are in homes near The Fox on the Hill pub, The Charter School East Dulwich and The Charter School and the streets around them. East Dulwich has its own railway station: East Dulwich station. Well-known places in the area include House of Dreams Museum (within half a mile south-east) and Surrey Quays Shopping Centre (2.8 miles north-east). For a walk, there’s Knight's Hill and Centre for Wildlife Gardening.
Places near East Dulwich
More services for East Dulwich
What we’re called out for in East Dulwich
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
Any of these means the joints need attention:
- Brick movement joints where the sealant has split
- Panel joints letting water in
- Cracked joints where brick meets render or frames
- Weathered mastic that no longer stretches
As a London address, East Dulwich can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- Whether they’re fully insured
- Whether the sealant suits the joint
- What the cure time is
- Whether all the old sealant comes out first
Why act early in East Dulwich
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in East Dulwich, the repair is bigger than the sealant job would have been.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why East Dulwich clients choose us
- Homes, businesses and hotels
- More than 20 years in sealant work
- Full insurance on every job
- A 12-month guarantee on all work
Read our cost guide and customer reviews.
Should I try it myself first?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.