Greater London · England
External & façade joints in Heron Quays, Greater London
Sealing brickwork movement joints, render, cladding and façade joints in Heron Quays, with a one-year guarantee on every job. Call for a quick quote.
- Joints pointed up with cement by mistake
- Rain getting behind render or cladding at a joint
- Weathered mastic that no longer stretches
External mastic in Heron Quays, done properly
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. We’re often asked to deal with movement joints filled with mortar instead of sealant and cracked joints where brick meets render or frames, on concrete & block, render & cladding joints and copings & trims.
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, and both kinds of building are found across London.
All of our work is guaranteed for twelve months, in Heron Quays and everywhere else we cover.
- Where
- Heron Quays (E14, SE16, E22)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
Quotes for external mastic in Heron Quays
Your quote is based on your job. We take into account:
- Working hours on commercial sites
- How many rooms, windows or areas are involved
- The product the joint needs
- Whether there’s mould to deal with
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, phone 0345 464 0079 or email us for an honest opinion and a quote.
What to tell us for a quote
To help us quote quickly, please include:
- What’s wrong with the joints now
- The rough size of the job
- Any previous sealing or DIY work
- Where the job is, and your postcode
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will talk you through the work and give you a clear price.
The process
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the job takes a few hours for a handful of joints, longer for a whole elevation in most cases. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Heron Quays. It helps if you can point us to a visitor permit or a bay close to the door.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Move anything stored near the joints
- Where the joints are inside, avoid wetting them before we arrive
- Keep pets and children clear of the area while we work
Get a quote
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. We’ll explain what we’d do and give you a clear price before any work starts.
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Landlords, agents and businesses in Heron Quays
We work for landlords and letting agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
If you manage several properties in or around Heron Quays, several properties can be quoted together. Just tell us the addresses and what each one needs.
Your questions about external mastic in Heron Quays
Can you help a landlord with a rental near Canary Wharf station?
Yes, landlords and agents are among the people we work for, 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.
Is parking an issue for external mastic in Heron Quays?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
When will the joints need doing again?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away.
Are you fully insured?
Yes. Full insurance covers our work.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you.
Do you cover Heron Quays?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so it does not stand out.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Ask before painting over external sealant
- Check external joints each spring
- Keep movement joints as flexible joints, not mortar
- Have failed joints looked at early
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Once a joint cannot move, the wall finds another way, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Outside joints around Heron Quays
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
If you let a flat or house near Canary Wharf station, split movement joints are easy to miss on a rental until damp shows inside. As a London address, Heron Quays can be tricky for parking: let us know about parking bays, permits or a driveway. Schools such as Seven Mills Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Heron Quays is about 2 miles north-west of Greenwich, in Greater London. We carry out external mastic for householders, landlords and businesses in Heron Quays and the surrounding area, as part of our work across Greater London. Across Greater London, we cover 764 places, Heron Quays among them.
All of E14, SE16 and E22 is covered for external mastic. Whether your property is on Tiller Road, Castor Lane and Cassilis Road or a nearby road, we can help. Being close to the A1261, Heron Quays is simple for us to get to for external mastic. We also cover the places around Heron Quays: Canary Wharf (1 mile north-east), London Docklands (1 mile north-east), Poplar (1 mile north-east), Coldharbour (1 mile east) and Blackwall (1 mile east). Larger places within reach include London (3 miles west), City of Westminster (6 miles west), Marylebone (5 miles west), Kensington (8 miles west), St Pancras (4 miles west) and Shoreditch (3 miles north-west).
Local landmarks in Heron Quays
Typical jobs here are in homes near Tower Hamlets College, Sir John McDougall Gardens and Canary Wharf College 3. Heron Quays has its own railway station: Canary Wharf station. Nearby you will also find The Pumphouse Educational Museum (0.7 miles west) and Surrey Quays Shopping Centre (1.2 miles south-west). The countryside around Heron Quays includes Tower Hill and St. James's Park Lake.
Places near Heron Quays
What else we do in Heron Quays
Why act early in Heron Quays
Resealing a run of joints in one go is normally better than patching one at a time. Joints of the same age tend to fail together. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before work begins.
Why choose Mr Mastic in Heron Quays
- Domestic, commercial and hotel work
- Sealant colour chosen to suit
- An ARBOMaster approved applicator
- Every job guaranteed for a year
Read our cost guide or what customers say.
Honest limits
We will always be straight with you, so here’s what sealant cannot fix:
- Failed render or damaged cladding panels
- Movement that’s more than a sealant joint can take
- Cracks in the bricks or render themselves, away from the joints
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Copings & trims