Greater London · England
External & façade joints in Greengate, Greater London
External mastic across Greengate and nearby, with old sealant always removed completely and a 12-month guarantee.
- Old sealant gone brittle and cracked
- Moss and dirt in joints with no sealant left
- Cracked joints where brick meets render or frames
External mastic in Greengate
Getting the depth right is half the job. 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 rigid filler in a joint that should flex and moss and dirt in joints with no sealant left, on façade panels, concrete & block and brickwork movement joints.
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.
All our work comes with our 12-month guarantee, wherever you are in Greater London.
- Where
- Greengate (E13, E6, E16)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. In a London area like Greengate, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Mention if the joints have been sealed before
- Tell us if parking is tricky
- Move anything stored near the joints
Ask for a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or drop us an email.
Read more
Outside joints around Greengate
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. Historic houses like Eastbury Manor House (about 3.1 miles east) are a reminder that the area around Greengate 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.
Greengate is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Managing a site like Southern Road Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Greengate is about 4 miles east of Whitechapel, in Greater London. Our applicators cover external mastic for householders, landlords and businesses in Greengate. 764 places in Greater London are on our list. You can also see our page for London, about 6 miles away.
All of E13, E6 and E16 is within our area for external mastic, from the main roads to the quietest streets. Streets in the area include May Road, Emma Road and Cave Road, all of which we cover. If you are just outside Greengate, we cover Plaistow (1 mile south-west), Upton Park (1 mile north-east), Upton (1 mile north), West Ham (1 mile north-west) and Canning Town (1 mile south). Further out, we also cover London (6 miles west), City of Westminster (8 miles west), Marylebone (8 miles west), Kensington (10 miles west), St Pancras (6 miles west) and Shoreditch (5 miles west).
Landmarks near Greengate
Locally, jobs take us to homes and businesses close to Coach And Horses Public House, Lister Community School and West Ham Park, among other places. The closest station to Greengate is West Ham station, about 1 mile west of the centre. Well-known places in the area include West Ham United Football Club Museum (0.6 miles north-east) and Stratford Centre (1.5 miles north-west). For a walk, there’s Old Ford Island and Tower Hill.
What we cannot put right
Before booking, it’s worth knowing the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Failed render or damaged cladding panels
- Movement that is more than a sealant joint can take
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
What we seal
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Concrete & block
Common questions in Greengate
Is parking a problem for a job in Greengate?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Do you work for landlords with property near West Ham station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can be quoted together. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Are you insured?
Yes, we’re fully insured for every job we do.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render, so the joint sits quietly in the wall. There’s a wide choice of exterior colours.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Does someone need to be in?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
What we are called out for in Greengate
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
People usually contact us when they notice one of these:
- Weeds or debris growing in open joints
- Damp patches traced to an open external joint
- Weathered mastic that no longer stretches
- Failed seals between different materials
Homes close to St Andrew's Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
What to look for in a quote
- The length of the guarantee
- How hidden problems are handled
- What insurance they hold
- What the cure time is
Places near Greengate
More services for Greengate
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Walk round the building once a year and look at the joints
- Avoid pressure-washing directly into sealant joints
- Never let anyone fill a movement joint with mortar
- Get split or bare joints resealed while the damage is small
Don’t paint over the new sealant unless we have said the product is paintable. Many exterior sealants are not designed to be painted, and paint can crack as the joint moves.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
What happens if it’s left?
Water gets in through a failed movement joint and can run behind render or cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first.
Why us?
- A 12-month guarantee on all work
- Rated 4.9 stars on Google
- Approved under the ARBOMaster scheme
- Neat joints and a tidy finish
Read our cost guide or customer reviews.
What affects the cost of external mastic
Jobs vary more than people expect. The main factors:
- The number and length of the joints
- Whether the work is at height
- How many rooms, windows or areas are involved
- Any mould that needs treating
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
What to tell us for a quote
When you call or email, it’s useful to know:
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
- Where the job is, and your postcode
Every job is quoted individually. Just phone 0345 464 0079 or drop us an email with the details, and photos are welcome.
Landlord and commercial work in Greengate
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.