Greater London · England
External Mastic in West Brompton
We cover West Brompton for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Moss and dirt in joints with no sealant left
- Cracked joints where brick meets render or frames
- Joints with sealant missing in places
When to call us in West Brompton
Sometimes a movement joint was filled with mortar or a rigid filler. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Any of these means the joints need attention:
- Failed seals between different materials
- Movement joints filled with mortar instead of sealant
- Damp patches traced to an open external joint
- Moss and dirt in joints with no sealant left
For site and facilities teams at buildings such as St Cuthbert with St Matthias CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before booking
- When the joint can take water or movement
- Whether the sealant suits the joint
- Who does the work, and how experienced they are
- What happens if the job turns out different
How we handle external mastic in West Brompton
Low-level joints can generally be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what’s needed to reach them safely. Common call-outs are for rigid filler in a joint that should flex and brick movement joints where the sealant has split, across concrete & block, brickwork movement joints and joints between brick and frames.
Outside work in London starts with access: side passages, upper floors and where to park. In West Brompton, joints up high may need ladders or other access, which is worth talking through when you book.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- West Brompton (SW6, SW10, SW5)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Can I do it myself?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
What affects the quote in West Brompton
Some jobs are bigger than they look, and some smaller. The main factors:
- The old material and how stubborn it is
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
- When we can work, for business premises
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Access, such as stairs, a lift or height
- The rough size of the job
- The type of property
- The address or postcode of the job
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.
West Brompton questions
Is parking an issue for external mastic in West Brompton?
Parking in West Brompton, 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.
Do you cover West Brompton for external mastic?
Yes. We work across London and the South East, and West Brompton is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear quote.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best so it doesn’t stand out.
Where do you work from?
We are based in Crawley, and we cover South East England, London and all of Scotland.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
I’m a tenant. Can you help?
Of course. Check with your landlord; we can send the quote to them too.
How long should I leave it?
Different products cure at different speeds, so follow the cure time we give you.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Nearby places to West Brompton
More services for West Brompton
What we can’t put right
New sealant cannot fix everything, and we’d rather say so up front. Sealant will not put right:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Structural movement, which needs a surveyor or engineer
- Damp that isn’t coming from the joint
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think before you book.
Surfaces we seal
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Concrete & block
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Show decorators and builders where the movement joints are
- Check external joints each spring
- Leave the joints unpainted unless we’ve said otherwise
- Get split or bare joints resealed while the damage is small
Keep pressure washers away from the sealant. High-pressure water can lift the edges over time.
Act while the splits are small. Then it’s a straightforward cut-out and reseal before water has had years to get in.
How it works
The work is kept neat and contained to the area we’re working on, so you can carry on as normal. The job normally takes a few hours to a few days, depending on the length of joint and the access, and we explain the cure time before we leave. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in West Brompton. 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.
- 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.
How to prepare
- Try not to wet indoor joints just before the visit
- Keep pets and children clear of the area while we work
- Clear items away from the joints we’re working on
Ask for a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.
Related advice
West Brompton buildings and the weather
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. 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.
In the older streets around Church of St Luke, old and new materials meet at the roofline and walls, which is where sealant earns its keep. West Brompton is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
West Brompton is about 1 mile south of Kensington, in Greater London. From the centre of West Brompton to the outskirts, we cover external mastic for every kind of property. We cover 764 towns and villages across Greater London, from the larger towns to small villages.
All of SW6, SW10 and SW5 is within our area for external mastic, from the main roads to the quietest streets. Whether your property is on Sun Road, Star Road and Farm Lane or anywhere close by, we can help. West Brompton is on the A3218 and A3220, which makes it straightforward to reach with everything needed for external mastic. Other places close to West Brompton include Earl's Court (1 mile north), Walham Green (1 mile south), World's End (1 mile south-east), Little Chelsea (1 mile east) and South Kensington (1 mile north-east). Larger places within reach include London (4 miles east), City of Westminster (3 miles north-east), Marylebone (3 miles north-east), St Pancras (4 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (10 miles north-east).
Local landmarks in West Brompton
Around West Brompton, our work takes us to homes and buildings near The London Oratory School, The Fulham Boys School and Gwendwr Garden, among other places. You will also find Natural History Museum Library and Archives (1.1 miles north-east) and Coleherne public house (less than half a mile north-east). West Brompton has its own railway station: West Brompton station. Well-known places in the area include Kensington Arcade (1 mile north) and Chelsea Stadium Tour And Museum (within half a mile south-east). For a walk, there’s The Long Water and WWT London Wetland Centre.