Greater London · England
External & façade joints in Wallend, Greater London
Professional external mastic in and around Wallend, with every bit of old sealant taken out first and a 12-month guarantee.
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
- Sealant that has lost its bond to the brick or render
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
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 doesn’t work out, we can still put it right.
External mastic in Wallend, done properly
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. We are often asked to deal with weathered mastic that no longer stretches and plants rooting in failed movement joints, on render & cladding joints, façade panels and concrete & block.
Outside work in London starts with access: side passages, upper floors and where to park. For a home in Wallend, tell us how high the joints are and how to reach the back of the building.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Location
- Wallend (E6, IG11, E12)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Wallend questions
Do you work for landlords with property near Barking station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Is parking an issue for external mastic in Wallend?
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.
How much does external mastic cost in Wallend?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you do not need to watch us work.
Where are you based?
Our base is Crawley. Our area covers South East England, London and Scotland.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme.
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.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.
Surface by surface
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.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so the movement is taken up.
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Leave the joints unpainted unless we’ve said otherwise
- Avoid pressure-washing directly into sealant joints
- Point out the joints to other trades
- Keep water from gutters off the wall
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
How it works
The work is kept neat and contained to the area we are working on, so you can get on with your day. Expect the work to take a few hours for a handful of joints, longer for a whole elevation, and we tell you how long to leave it before we go. For a job in Wallend, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs 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
- For business premises, tell us about site rules or sign-in
- Tell us about access, such as stairs, a lift or high-level joints
- Plan for the work area to be out of bounds to pets and children
Get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.
Read more
Why it’s worth doing now in Wallend
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Wallend, the repair is bigger than a sealant job.
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Why Wallend clients choose us
- Approved under the ARBOMaster scheme
- We leave the area clean and tidy
- 180+ five-star Google reviews
- More than 20 years in sealant work
Also near Wallend
Also in Wallend
Walls and rooflines in Wallend
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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as St John the Baptist's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Rented homes near Barking station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. Wallend is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Wallend is about 1 mile west of Barking, in Greater London. Wherever you are in the E6 postcode area, we can carry out external mastic at your property. Our Greater London coverage runs to 764 places, and Wallend is one of them. You can also see our page for London, roughly 7 miles from Wallend.
We cover every part of the E6, IG11 and E12 postcode area for external mastic and the streets around it. Whether your property is on Hall Road, Quay Road and Ascot Road or anywhere close by, we can help. With the A117 close by, Wallend is simple for us to get to. We also cover the places around Wallend: East Ham (1 mile south-west), Plashet (1 mile north-west), Upton Park (1 mile west), Manor Park (1 mile north) and Beckton (1 mile south). We also work in nearby towns such as London (7 miles west), City of Westminster (9 miles west), Marylebone (9 miles west), Kensington (12 miles west), St Pancras (8 miles west) and Shoreditch (6 miles west).
Near you in Wallend
Typical jobs here are in homes near Dukes Head Public House, Tyndale Academy and Loxford Park, among other places. The closest station to Wallend is Barking station, about 0.9 miles north-east. Other landmarks nearby include Gallions Reach Shopping Park (1.7 miles south-east) and Newham University Hospital (1.4 miles south-west). Open spaces near Wallend include Hollow Pond and Ripple Nature Reserve.
What sealant work can’t fix
We won’t take on work that will not last, so these are the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
If you are not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Copings & trims
- Joints between brick and frames
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Façade panels
Work for landlords, hotels 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.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.