Greater London · England
West Ham External Mastic
External mastic for West Ham, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps where render, brick and frames meet
- Rigid filler in a joint that should flex
- Leaking joints around cladding and façade panels
How we quote for external mastic
The quote reflects the job in front of us. We take into account:
- Mould in or behind the old joints
- The type of sealant required
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
The cost reflects the work involved, not guesswork. That’s why we ask about the job first.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- How many joints, rooms or windows are involved
- The type of property
- Where the property is
- Pictures of the joints, sent by email
We quote each job on its own, so the first step is telling us about yours. Simply phone 0345 464 0079 or send us an email and describe the job and send photos if you have them.
About our external mastic in West Ham
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it, and we don’t skip that step. If you have cracked joints where brick meets render or frames and weeds or debris growing in open joints, we can put it right, on façade panels, joints between brick and frames and concrete & block alike.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in West Ham, tell us how high the joints are and how to reach the back of the building.
Each job carries a 12-month guarantee, large or small.
- Where
- West Ham (E15, E13, E7)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Do you need external mastic in West Ham?
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
Signs it’s time to call us include:
- Joints with sealant missing in places
- Gaps where render, brick and frames meet
- Rain getting behind render or cladding at a joint
- Hard, crazed mastic that has stopped moving
West Ham is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Comparing quotes
- Are they insured?
- What happens if they find a problem under the old sealant
- Who does the work, and how experienced they are
- How the surfaces are prepared before sealing
Leave it or put it right?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in West Ham, the repair is bigger than a sealant job.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in West Ham
- White, clear, grey or coloured to suit, where the product allows
- Colour agreed with you before we start
- Tidy, careful work
- We never seal over old sealant
See our cost guide and customer reviews.
Questions from West Ham
I let a flat near West Ham station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before we start.
Is parking a problem for a job in West Ham?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
What’s an expansion joint in brickwork?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Will the old sealant be removed?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Do you work for hotels and businesses?
Yes. Larger jobs can be planned room by room or area by area.
Are you fully insured?
Yes. We are fully insured.
Do you work at height?
It depends on the height and the site. Low-level joints are straightforward; for higher ones, send details and we’ll confirm the access.
Different surfaces, different methods
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
What else we do in West Ham
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
We work for letting agents and landlords as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
What external mastic looks like in West Ham
London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts. With historic houses such as Sutton House (about 2.9 miles west) nearby, there’s older building stock in the area around West Ham as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
If you look after a building such as West Ham Church Primary School, its movement joints, gutters and trims need looking after like any other building’s. If you let a flat or house near West Ham station, outside joints that have cracked can let damp into a rental, so check them between lets.
West Ham is about 2 miles west of East Ham, in Greater London. Every kind of property in West Ham can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. West Ham is one of 764 places in Greater London we cover.
Our applicators cover all of the E15, E13 and E7 postcode area for external mastic. Whether your property is on Plaistow Grove, Willis Road and Moorey Close or anywhere close by, our applicators can take on the job. Close by, we work in Upton (1 mile north-east), Greengate (1 mile south-east), Maryland (1 mile north-west), Stratford (1 mile north-west) and Plaistow (1 mile south-east). Further out, we also cover London (5 miles south-west), City of Westminster (7 miles west), Marylebone (7 miles west), Kensington (9 miles west), St Pancras (6 miles west) and Shoreditch (4 miles west).
What’s near West Ham
In West Ham, that means homes and buildings near West Ham Church School, The Earl Of Derby Public House and St Bonaventure's RC School. For rail, the closest station is West Ham station, roughly 0.5 miles south-west. A little further out are Greenwich Castle (3.9 miles south) and Passmore Edwards Museum (0.6 miles north). Green spaces nearby include Old Ford Island and Tower Hill.
How the visit works
At the end, we look at the finished work together and explain the cure time. The visit itself generally takes a few hours to a few days, depending on the length of joint and the access, depending on the size of the job. In West Ham, 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.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Move anything stored near the joints
- Tell us about any water getting in
- Mention any parking rules near the property
Get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or email us with a few details. We’ll explain what we’d do and give you a clear quote before any work starts.
Related advice
Honest limits
To be straight with you, some problems need a different trade:
- Structural movement, which needs a surveyor or engineer
- Walls that need new movement joints cut into them
- Cracks in the bricks or render themselves, away from the joints
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before booking.
What we seal
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Concrete & block