Greater London · England
External & façade joints in Isle of Dogs, Greater London
Sealing brickwork movement joints, render, cladding and façade joints for Isle of Dogs, backed by a one-year guarantee. Ask us for a quote.
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
- Damp patches traced to an open external joint
External mastic in Isle of Dogs, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it, and we do not skip that step. Common call-outs are for failed sealant between panels on a façade and joints with sealant missing in places, on copings & trims, render & cladding joints and joints between brick and frames.
Newer London blocks are built with movement joints in brick and render, and with cladding joints sealed with mastic. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Isle of Dogs (E14, SE8, SE10)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
External mastic in Isle of Dogs: local notes
With historic houses such as Queen's House (about 0.8 miles south-east) nearby, there’s older building stock in the area around Isle of Dogs 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 terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
Isle of Dogs is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Rented homes near Greenwich station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. For site and facilities teams at buildings such as Harbinger Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Isle of Dogs is about 1 mile north-west of Greenwich, in Greater London. Across the E14 area, we can carry out external mastic at your property. Our Greater London coverage runs to 764 places, and Isle of Dogs is one of them.
Here we cover the E14, SE8 and SE10 postcode area for external mastic. We cover properties on Creek Road, Wynan Road and Undine Road and the roads around them. Neighbouring places we cover for external mastic include North Greenwich (1 mile north-west), Millwall (1 mile west), Cubitt Town (1 mile north-east), Deptford (1 mile south-west) and Greenwich (1 mile south-east). Further out, we also cover London (3 miles west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (5 miles north-west) and Shoreditch (4 miles north-west).
What’s near Isle of Dogs
We work in homes and buildings around The Ferry House Public House, Laban Centre and St. Paul's. Other local landmarks include Mudchute Park and Farm (less than half a mile north-east) and Canary Wharf College 3 (under half a mile north). The nearest railway station is Greenwich station, about 0.7 miles south. Nearby you will also find Greenwich Castle (1 mile south-east) and Surrey Quays Shopping Centre (1.3 miles west). Green spaces nearby include Tower Hill and Sue Godfrey Nature Park.
How it works
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a handful of joints, longer for a whole elevation. In a London area like Isle of Dogs, 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 look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
Getting a quote
Every job is quoted individually, so start by telling us what you need. Just ring 0345 464 0079 or drop us an email with the details and send photos if you have them.
Related advice
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Check external joints each spring
- Don’t let climbing plants root in the sealant
- Leave the joints unpainted unless we have said otherwise
- Point out the joints to other trades
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Nearby places to Isle of Dogs
Also in Isle of Dogs
Isle of Dogs questions
Is Isle of Dogs in your area for external mastic?
Yes, Isle of Dogs is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
Can you help a landlord with a rental near Greenwich station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
How long will you be here?
That depends on how much there is to do, but as a guide it takes anything from a few hours to several days, depending on the building. We will tell you when we quote.
How often do external joints need resealing?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year.
Can you seal joints between render and window frames?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Landlords, agents and businesses in Isle of Dogs
We also work for property managers and facilities teams. We can quote a run of properties together.
If you manage several properties in or around Isle of Dogs, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
What affects the quote in Isle of Dogs
Your quote is based on your job. We look at:
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- The amount of work
- Mould in or behind the old joints
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or drop us an email and we’ll talk you through it.
What we need to know
You do not need to know the technical terms. It helps if you can tell us:
- Whether it has been sealed before
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
- The rough size of the job
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. We will send you a clear quote before any work starts.
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- Cracked brickwork or render that needs a builder or plasterer
- Damp that isn’t coming from the joint
- Loose or hollow render, which needs re-rendering
If you’re not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
What we seal
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Joints between brick and frames
- Render & cladding joints
- Façade panels
Why deal with it now?
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and does not last, so it pays to do it properly once. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Isle of Dogs, the repair is bigger than the sealant job would have been.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why us?
- Homes, businesses and hotels
- More than 20 years in sealant work
- Arbo and Everbuild products
- Fully insured
Take a look at our cost guide and what customers say.