Greater London · England
External & façade joints in Upton, Greater London
External mastic across Upton and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Damp patches traced to an open external joint
- Old sealant gone brittle and cracked
- Failed sealant between panels on a façade
Do you need external mastic in Upton?
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Keep an eye out for these signs:
- Rain getting behind render or cladding at a joint
- Hard, crazed mastic that has stopped moving
- Joints pointed up with cement by mistake
- Leaking joints around cladding and façade panels
Letting a property close to Forest Gate station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Questions to ask before you book
- Who does the work, and how experienced they are
- Which colour the sealant will be
- Whether they seal over old material or remove it
- Which sealant they’ll use, and why
How we handle external mastic in Upton
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing and we use one wherever it does. If you have failed seals between different materials and moss and dirt in joints with no sealant left, we can help, on joints between brick and frames, façade panels and brickwork movement joints alike.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in Upton, tell us how high the joints are and how to reach the back of the building.
Every job is covered by our one-year guarantee, wherever you are in Greater London.
- Location
- Upton (E7, E13, E15)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Telephone
- 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.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Also near Upton
Other services in Upton
What affects the cost of external mastic
Every job gets its own quote. These are the things that affect it:
- How much old sealant there is and how hard it is to remove
- The product the joint needs
- Any mould that needs treating
- Working hours on commercial sites
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Roughly how big the job is
- If someone has resealed it before
- A few pictures by email, if you can
- The address or postcode of the job
We do not publish a price list. Instead, we give you a clear quote for your job. To get started, phone 0345 464 0079 or email us.
What happens if it’s left?
Running new sealant over the old bead rarely lasts. The new layer can’t bond properly to old, weathered material, so the old joint is cut out fully first. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Upton, the repair is bigger than a sealant job.
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
Why us?
- Homes, businesses and hotels
- We’re fully insured
- Anti-fungal silicone where joints get wet
- ARBOMaster approved applicator
Take a look at what affects the cost and what customers say.
How the job changes by surface
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap.
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and helps it last.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
What external mastic looks like in Upton
With historic houses such as Valentines Mansion (about 2.8 miles north-east) nearby, there’s older building stock in the area around Upton as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Upton is in London, so parking needs planning: let us know about parking bays, permits or a driveway. Managing a site like Elmhurst Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Upton is about 1 mile north of Plaistow, in Greater London. Every kind of property in Upton can book us for external mastic. Every job comes with our 12-month guarantee. Our Greater London coverage runs to 764 places, and Upton is one of them. For nearby work, see our London page.
Jobs for external mastic in E7, E13 and E15 works the same way as everywhere else we cover. Whether your property is on May Road, West Road and Park Road or anywhere close by, we can help. Close by, we work in Upton Park (1 mile south-east), Greengate (1 mile south), West Ham (1 mile south-west), Forest Gate (1 mile north) and Plashet (1 mile east). We also work in nearby towns such as London (6 miles south-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).
Around Upton
We work in homes and buildings around St Bonaventure's RC School, West Ham Park and Spotted Dog pub and the streets around them. For rail, the closest station is Forest Gate station, roughly 0.8 miles north. A little further out are Queen Mary's Hospital for the East End (1 mile west) and Greenwich Castle (4.4 miles south). For a walk, there’s Hollow Pond and Tower Hill.
Questions from Upton
Is Upton in your area for external mastic?
Yes. Our work covers London and the South East, and Upton is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Can parking be tricky for a visit in Upton?
Parking in Upton, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
What is backing rod for?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back, so the joint can move.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
How long does external mastic take?
Most jobs take a few hours for a handful of joints, longer for a whole elevation, including the preparation. Your quote will say how long we expect yours to take.
What does external mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote and we’ll talk you through it.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you when we finish.
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the building and we leave things clean and tidy. In Upton, 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.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Clear the area around the work
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
For external mastic in Upton, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.