Greater London · England
External & façade joints in Three Mills, Greater London
External mastic for Three Mills, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps where render, brick and frames meet
- Movement joints filled with mortar instead of sealant
- Joints where the bead has come unstuck
External mastic in Three Mills, done properly
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. If you have leaking joints around cladding and façade panels and old sealant gone brittle and cracked, we can help, on brickwork movement joints, concrete & block and render & cladding joints alike.
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, and both kinds of building are found across London.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Three Mills (E3, E15, E14)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Three Mills: your questions answered
Is parking an issue for external mastic in Three Mills?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Can you help a landlord with a rental near West Ham station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is there any odour?
Possibly a little. It fades as the sealant cures.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is usually a movement joint. It lets the bricks expand without cracking, and it should be sealed with a flexible sealant.
How do you reach high-level joints?
It depends on the height and the site. Low-level joints are straightforward; for higher work, tell us about the building and we will confirm what’s needed.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Do you remove the old sealant?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Places near Three Mills
More services for Three Mills
Leave it or put it right?
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Three Mills, the repair is bigger than the sealant job would have been.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
Why book with us
- Fully insured
- White, clear, grey or coloured to suit, where the product allows
- 180+ five-star Google reviews
- Neat joints and a tidy finish
Take a look at how sealant jobs are priced or what customers say.
Walls and rooflines in Three Mills
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you look after a building such as East London Science School, larger buildings have long runs of movement joint that eventually need resealing. Three Mills is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Three Mills is about 1 mile south of Stratford, in Greater London. From the centre of Three Mills to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. We cover 764 towns and villages across Greater London.
All of E3, E15 and E14 is covered for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Gay Road, Bruce Road and Edgar Road or a nearby road, our applicators can take on the job. We also cover Mill Meads (1 mile north), Bromley (1 mile south-west), Old Ford (1 mile north-west), Bow (1 mile west) and Bow Common (1 mile south-west). Larger places within reach include London (4 miles south-west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (9 miles west), St Pancras (5 miles west) and Shoreditch (3 miles west).
Landmarks near Three Mills
Typical jobs here are in homes near Manorfield Primary School, London International School of Performing Arts and Bob's Park and the streets around them. The nearest railway station is West Ham station, about 0.5 miles east. Well-known places in the area include Stratford Centre (1 mile north) and St Clement's Hospital (0.9 miles west). Open spaces near Three Mills include Hollow Pond and Old Ford Island.
The process
When we arrive, we look over the joints with you first. We protect the surfaces around the joints before any work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In Three Mills, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
Getting a quote
Need a quote? Please call 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
When to call us in Three Mills
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
Keep an eye out for these signs:
- Leaking joints around cladding and façade panels
- Movement joints filled with mortar instead of sealant
- Hard, crazed mastic that has stopped moving
- Cracked joints where brick meets render or frames
For landlords with property near West Ham station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Before booking anyone
- How the joint is cleaned and prepared
- When the joint can take water or movement
- Is the old sealant removed completely?
- What happens if they find a problem under the old sealant
What the job involves on each surface
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
DIY sealant or a professional job?
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.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What we can’t put right
In fairness, there are a few things sealant will not fix:
- Walls that need new movement joints cut into them
- Rising or penetrating damp from elsewhere in the wall
- Render that’s blown, hollow or coming away
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Façade panels
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
We work for landlords and agents as well as homeowners. Resealing between tenancies keeps a property looking cared for.