Greater London · England
External & façade joints in Camberwell, Greater London
Sealing brickwork movement joints, render, cladding and façade joints for Camberwell, backed by a one-year guarantee. Call for a quick quote.
- Joints pointed up with cement by mistake
- Panel joints letting water in
- Weathered mastic that no longer stretches
Surface by surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joint sealant has to cope with frequent movement. We choose the product to suit.
External mastic in Camberwell, done properly
On houses, flats and commercial buildings across Camberwell, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you’re dealing with movement joints filled with mortar instead of sealant and rain getting behind render or cladding at a joint, we can put it right.
Modern London flats rely on sealed movement joints and cladding joints. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Camberwell (SE5, SE15, SE22, SE24)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Camberwell
Also in Camberwell
Landlords, agents and businesses in Camberwell
We work for landlords and letting agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we are fully insured.
External mastic in Camberwell: local notes
In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts. Historic houses like Mansion House (about 2.7 miles north) are a reminder that the area around Camberwell 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 St Giles' Church, the joints between older walls, newer extensions and the roofline need a sealant that can move. Managing a site like Mary Datchelor School? Then larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Denmark Hill station, outside joints that have cracked can let damp into a rental, so check them between lets.
Camberwell is about 2 miles south of London, in Greater London. Jobs in Camberwell get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Camberwell is one of 764 places in Greater London where we work for external mastic.
Jobs for external mastic in SE5, SE15, SE22 and SE24 works the same way as everywhere else we cover. If you need external mastic at a property on New Church Road, Camberwell Station Road and Addington Square or a nearby road, we can help. Camberwell is on the A202 and B214, so it’s easy for us to get to. Other places close to Camberwell include Denmark Hill (1 mile south), East Dulwich (1 mile south), Walworth (1 mile north), Peckham (1 mile east) and Herne Hill (1 mile south). Further out, we also cover City of Westminster (4 miles north-west), Marylebone (4 miles north-west), Kensington (5 miles west), St Pancras (4 miles north), Shoreditch (4 miles north) and Walthamstow (8 miles north).
Around Camberwell
We work in homes and buildings around Brunswick Park Primary School, Hermits Cave pub and Sacred Heart Catholic School, among other places. Camberwell has its own railway station: Denmark Hill station. Nearby you’ll also find St Giles' Hospital (within half a mile east) and Surrey Quays Shopping Centre (2.3 miles north-east). Green spaces nearby include Bellenden Road Nature Garden and Knight's Hill.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Your questions about external mastic in Camberwell
Can parking be tricky for a visit in Camberwell?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
I let a flat near Denmark Hill station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Can you reach joints on upper floors?
It depends on the height and the site. Ground-floor joints are simple; for higher ones, send details and we will confirm the access.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
How often do external joints need resealing?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Every job carries our 12-month guarantee.
How long does the job take?
Typically it takes a few hours to a few days, depending on the length of joint and the access. Bigger jobs take longer, and we’ll say how long yours will take.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
When it isn’t the sealant
We will not take on work that won’t last, so these are the limits:
- Cracks in the bricks or render themselves, away from the joints
- Movement that’s more than a sealant joint can take
- Render that is blown, hollow or coming away
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Where we work in Camberwell
- Façade panels
- Copings & trims
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
The process
We keep the work tidy and contained to the area we are working on. Expect the work to take 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.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
- Mention any leaks or damp you’ve noticed
Get a quote
Asking for a quote is easy: tell us what needs doing and where. Photos by email help us understand the job.
Advice
Quotes for external mastic in Camberwell
Your quote is based on your job. We look at:
- How many areas need sealing
- Any mould that needs treating
- The number and length of the joints
- Access and height
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
What we need to know
What to tell us when you ask for a quote:
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- The address or postcode of the job
- What’s wrong with the joints now
We do not publish a price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
Leave it or put it right?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render near the open joint, so the problem grows beyond the joint itself. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Camberwell, the repair is bigger than a sealant job.
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
What you get with us
- White, clear, grey or another colour, product permitting
- 180+ five-star Google reviews
- Homes, businesses and hotels
- Full insurance on every job