Greater London · England
External & façade joints in Millbank, Greater London
Our applicators work in Millbank on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Sealant pulling away from one side of the joint
- Old sealant gone brittle and cracked
- Joints with sealant missing in places
External mastic in Millbank
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. Typical jobs include failed sealant between panels on a façade and joints where the bead has come unstuck, across render & cladding joints, brickwork movement joints and façade panels.
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 Millbank, it’s worth checking who is responsible for the outside before booking.
Our work is backed for twelve months, in Millbank and everywhere else we cover.
- Location
- Millbank (SW1P, W1J, SW1V)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Millbank
Can parking be tricky for a visit in Millbank?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
I let a flat near London Victoria station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
How do I get a quote for external mastic in Millbank?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or send us an email and let us know what needs doing and where.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done.
How long will you be here?
That depends on how much there is to do, but most jobs take a few hours to a few days, depending on the length of joint and the access. We’ll tell you when we quote.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
How long does external mastic last?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly and reseal when it splits.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render. There’s a wide choice of exterior colours.
Do you need external mastic in Millbank?
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
Any of these means the joints need attention:
- Joints with sealant missing in places
- Joints where the bead has come unstuck
- Failed seals between different materials
- Rigid filler in a joint that should flex
Schools such as Harris Westminster Sixth Form are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- What happens if they find a problem under the old sealant
- How the joint is cleaned and prepared
- Whether they’re fully insured
- How long the guarantee is
Also near Millbank
More services for Millbank
Keeping the joints in good condition
After the cure time, these simple habits help:
- Have failed joints looked at early
- Show decorators and builders where the movement joints are
- Check the sealant is paintable before painting near it
- Look over the joints every year, ideally after winter
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
External mastic in Millbank: local notes
Historic houses like Clarence House (about 0.4 miles north-west) are a reminder that the area around Millbank 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. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near London Victoria station, outside joints that have cracked can let damp into a rental, so check them between lets. Millbank is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Millbank is about 1 mile south-east of City of Westminster, in Greater London. For external mastic in and around Millbank, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We are based in Crawley and cover Greater London, Millbank included. 764 places in Greater London are on our list, from the larger towns to small villages.
Every address in SW1P, W1J and SW1V is covered for external mastic. We cover properties on Eaton Lane, Wilton Road and Castle Lane and the roads around them. Millbank is on the A4 and A202, which makes it straightforward to reach with everything needed for external mastic. Other places close to Millbank include Westminster (1 mile north), Victoria (1 mile south-west), Pimlico (1 mile south), Vauxhall (1 mile south-east) and Lambeth (1 mile south-east). Larger places within reach include Kensington (3 miles west), Shoreditch (3 miles north-east), Walthamstow (8 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles north-east) and Hampstead (4 miles north-west).
Near you in Millbank
In Millbank, that means homes and buildings near Blewcoat School, St Matthew's School and London Library. Nearby too are St James's Park (under half a mile north) and Grafton Arms (less than half a mile south). For rail, the closest station is London Victoria station, roughly 0.6 miles south-west. Other landmarks nearby include Westminster Hospital (less than half a mile east) and Kingly Court (0.9 miles north). For a walk, there’s St. James's Park Lake and Ludgate Hill.
How the job changes by surface
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured for the work.
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
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.
How the visit works
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the job takes anything from a few hours to several days, depending on the building in most cases. 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.
- First, the joints are inspected and the access agreed.
- 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.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Let us know if you’ve seen damp or leaks
- Keep children and pets away from the work area
- Mention any tricky access
How to get a quote
Want a quote for external mastic? Please ring 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
Why deal with it now?
Resealing a run of joints in one go is generally better than patching one at a time. Joints of the same age tend to fail together and it means sorting access once. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Millbank, the repair is bigger than a sealant job.
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
What you get with us
- Fully insured
- Any old sealant cut out fully, not covered over
- More than 20 years in sealant work
- Anti-fungal sanitary silicone in wet areas
Take a look at what affects the cost or what customers say.