Greater London · England
External & façade joints in Brompton, Greater London
Our applicators work in Brompton on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Movement joints filled with mortar instead of sealant
- Joints where the bead has come unstuck
- Weeds or debris growing in open joints
About our external mastic in Brompton
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. We’re often asked to deal with water getting into walls through failed joints and old sealant gone brittle and cracked, across joints between brick and frames, façade panels and copings & trims.
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.
Every job is covered by a one-year guarantee, wherever you are in Greater London.
- Location
- Brompton (SW3, SW7, SW1X)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Walls and rooflines in Brompton
Historic houses like Carlyle's House (about 0.8 miles south) are a reminder that the area around Brompton has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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.
Letting a property close to London Victoria station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. As a London address, Brompton can be tricky for parking: let us know about parking bays, permits or a driveway.
Brompton is about 1 mile south of City of Westminster, in Greater London. Every kind of property in Brompton is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Across Greater London, we cover 764 places, Brompton among them.
We work across SW3, SW7 and SW1X for external mastic. That includes homes and businesses on West Road, Hans Road and Eaton Lane and the roads around them. With the A315 and A3212 close by, Brompton is simple for us to get to for external mastic. If you are just outside Brompton, we cover Chelsea (1 mile south), Belgravia (1 mile north-east), South Kensington (1 mile south-west), Victoria (1 mile east) and Little Chelsea (1 mile south-west). We also work in nearby towns such as London (3 miles east), St Pancras (3 miles north-east), Shoreditch (4 miles north-east), Walthamstow (9 miles north-east), Hoxton (4 miles north-east) and Whitechapel (4 miles east).
Local landmarks in Brompton
Typical jobs here are in homes near St Thomas More RC Language College, St Joseph's Catholic Primary School and Natural History Museum Library and Archives and the streets around them. Also close by are Shuckburgh Arms (within half a mile south-west) and Burton’s Court (0.5 miles south). Brompton’s nearest station is London Victoria station, about 0.8 miles east of the centre. Nearby you will also find Baynard's Castle (3 miles east) and Berkshire & Westminster Dragoons Museum (less than half a mile south-east). Green spaces nearby include Greville Place nature reserve and Serpentine.
The process
Before we leave, we go over the finished joints with you. The visit itself usually takes anything from a few hours to several days, depending on the building, depending on the amount of work. In Brompton, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Keep children and pets away from the work area
- Tell us if parking is tricky
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will take it from there.
Advice
Quotes for external mastic in Brompton
You’ll get a clear quote before any work starts. It takes into account:
- Whether old sealant or filler has to be cut out
- The type of sealant required
- How many rooms, windows or areas are involved
- How easy the joints are to reach
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The type of property
- Where the job is, and your postcode
- Roughly how big the job is
- What’s wrong with the joints now
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or send us an email.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams in Brompton and across Greater London. Several sites can go on one quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
When to call us in Brompton
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
Any of these means the joints need attention:
- Movement joints filled with mortar instead of sealant
- Leaking joints around cladding and façade panels
- Damp patches traced to an open external joint
- Joints with sealant missing in places
For site and facilities teams at buildings such as Hellenic College of London, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What to look for in a quote
- Is VAT in the price?
- What guarantee comes with the work
- What insurance they hold
- How the colour is chosen
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Make sure movement joints are not pointed over
- Check external joints each spring
- Get split or bare joints resealed while the damage is small
- Don’t let climbing plants root in the sealant
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead over time.
Once a joint can’t move, the wall finds another way, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
FAQs for Brompton
I let a flat near London Victoria station. Can you help?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Is parking an issue for external mastic in Brompton?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Can you match the colour of my brickwork?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin from the range available.
Do you guarantee your work?
Yes. Every job comes with our 12-month guarantee.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
How long will you be here?
Typically it takes a few hours for a handful of joints, longer for a whole elevation. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Towns and villages near Brompton
What else we do in Brompton
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
What sealant work can’t fix
Before you book, it’s worth knowing the limits:
- Failed render or damaged cladding panels
- Movement that is more than a sealant joint can take
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, phone 0345 464 0079 or email us and we will say what we think before booking.
Joints and surfaces we work on
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Render & cladding joints