Greater London · England
External & façade joints in Bermondsey, Greater London
Sealing brickwork movement joints, render, cladding and façade joints in Bermondsey, with a one-year guarantee on every job. Ask us for a quote.
- Rigid filler in a joint that should flex
- Brick movement joints where the sealant has split
- Hard, crazed mastic that has stopped moving
What affects the quote in Bermondsey
We quote each job individually. These are the things that affect it:
- Working hours on commercial sites
- Mould in or behind the old joints
- How many areas need sealing
- The product the joint needs
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What to tell us for a quote
What to tell us when you ask for a quote:
- Whether it’s a home or a business
- Whether it has been sealed before
- A few photos by email, if you can
- Where the job is, and your postcode
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work.
How we handle external mastic in Bermondsey
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. Common call-outs are for sealant that has lost its bond to the brick or render and rigid filler in a joint that should flex, across concrete & block, joints between brick and frames and render & cladding joints.
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, and both kinds of building are found across London.
All of our work is guaranteed for twelve months.
- Place
- Bermondsey (SE1, SE16, SE5)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Bermondsey questions
Is parking a problem for a job in Bermondsey?
Parking in Bermondsey, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Can you help a landlord with a rental near London Bridge 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 email us with the address and what needs doing, and we will give you a clear price.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will explain our choice.
What information do you need?
Tell us what needs doing and where, plus pictures if you have them. If we need more, we’ll ask.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Where are you based?
We’re a Crawley-based firm. We work across South East England, London and Scotland.
Do you work at height?
It depends on the height and the site. Ground-floor joints are simple; for higher ones, send details and we’ll confirm the access.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
What external mastic looks like in Bermondsey
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Mansion House (about 1.3 miles north-west) nearby, there’s older building stock in the area around Bermondsey as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
As a London address, Bermondsey can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Letting a property close to London Bridge station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Bermondsey is about 1 mile east of London, in Greater London. Whether you are in the middle of Bermondsey or further out, external mastic is available for homes and businesses alike. Bermondsey is one of 764 towns and villages in Greater London we cover for external mastic.
Here we cover the SE1, SE16 and SE5 postcode area for external mastic. External mastic is available to properties on Crown Square, Fire Station Square and Layard Square and the roads around them. Bermondsey sits on or near the A100 and B202, which makes travel easy. Close by, we work in Walworth (1 mile south-west), London (1 mile west), South Bermondsey (1 mile south-east), Surrey Canal (1 mile south-east) and Surrey Quays (1 mile east). Further out, we also cover City of Westminster (4 miles west), Marylebone (3 miles north-west), Kensington (5 miles west), St Pancras (3 miles north-west), Walthamstow (7 miles north) and Hoxton (3 miles north).
Around Bermondsey
Around Bermondsey, our work takes us to homes and buildings near Asylum for the deaf and dumb, St Mary-at-Hill and Harris Academy Bermondsey and the streets around them. Nearby too are Bishopsgate Institute Special Collections and Archives (1.5 miles north), Bermondsey Spa Gardens (less than half a mile south) and Simon the Tanner pub (within half a mile west). For rail, the closest station is London Bridge station, roughly 0.7 miles north-west of the centre. Well-known places in the area include Fashion and Textile Museum (under half a mile west) and Guy's Hospital (0.7 miles north-west). The countryside around Bermondsey includes St. James's Park Lake and Bellenden Road Nature Garden.
Also near Bermondsey
Also in Bermondsey
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
Letting agents and landlords in Bermondsey can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Common problems we fix in Bermondsey
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
Signs it’s time to call us include:
- Weathered mastic that no longer stretches
- Cracked joints where brick meets render or frames
- Panel joints letting water in
- Rain getting behind render or cladding at a joint
For site and facilities teams at buildings such as Boutcher Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Before booking anyone
- What happens if they find a problem under the old sealant
- Whether the sealant suits the joint
- What the cure time is
- Whether VAT is included
What we do, step by step
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours to a few days, depending on the length of joint and the access. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Bermondsey. It helps if you can point us to a visitor permit or a bay close to the door.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Move anything stored near the joints
- Tell us about any water getting in
- Let us know about stairs, lifts or work at height
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, phone 0345 464 0079 or drop us an email.
Advice
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- Walls that need new movement joints cut into them
- Failed render or damaged cladding panels
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before you book.
What we seal
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Façade panels