Greater London · England
Hackney Wick External Mastic
External mastic across Hackney Wick and nearby, with old sealant always removed completely and a 12-month guarantee.
- Joints where the bead has come unstuck
- Moss and dirt in joints with no sealant left
- Failed seals between different materials
External mastic in Hackney Wick, done properly
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant. We work on façade panels, render & cladding joints and copings & trims, and common reasons people get in touch are failed seals between different materials and water getting into walls through failed joints.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so one failed joint can cause damp for more than one household. In a converted house in Hackney Wick, it’s worth checking who is responsible for the outside before booking.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Hackney Wick (E3, E9, E20)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What happens on the day
Before we leave, we go over the finished joints with you 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 Hackney Wick, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- 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.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Keep children and pets away from the work area
- Tell us about any water getting in
- Mention any tricky access
Get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and give you a clear price before we start.
Related advice
Aftercare tips
After the cure time, these simple habits help:
- Ask before painting over external sealant
- Avoid pressure-washing directly into sealant joints
- Show decorators and builders where the movement joints are
- Keep soil, plants and ivy away from the joints
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Once a joint cannot move, the wall finds another way, usually as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Surface by surface
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it so the sealant is not too deep.
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. 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 Hackney Wick, the repair is bigger than the sealant job would have been.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or send us an email.
Why book with us
- We agree the colour with you first
- More than 20 years in sealant work
- Full insurance on every job
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at our cost guide or customer reviews.
Quotes for external mastic in Hackney Wick
Every job gets its own quote. These are the things that affect it:
- When we can work, for business premises
- The type of sealant required
- Whether old sealant or filler has to be cut out
- How many rooms, windows or areas are involved
What you pay reflects the work, not a rough estimate. That is why we ask about the job first and send you a clear quote before we start.
Asking for a quote
There’s no need for technical detail. Just tell us:
- If someone has resealed it before
- The problem you’ve noticed
- The rough size of the job
- Whether it’s a home or a business
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Work for landlords, hotels and businesses
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
If you manage several properties in or around Hackney Wick, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Questions from Hackney Wick
Do you cover Hackney Wick for external mastic?
Yes. Our work covers London and the South East, and Hackney Wick is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near Hackney Wick station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or email us with the details for a clear quote.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
How long does external mastic last?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away and have them redone then.
Will the new joint stand out?
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 the joint doesn’t draw the eye.
What do you need from me for a quote?
A short description and the location, with pictures by email if possible. We will ask anything else we need to know.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
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 bead can stretch.
Signs you need external mastic in Hackney Wick
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Look out for these signs:
- Weeds or debris growing in open joints
- Rain getting behind render or cladding at a joint
- Brick movement joints where the sealant has split
- Failed sealant between panels on a façade
As a London address, Hackney Wick can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- Who does the work, and how experienced they are
- How long to leave it before use
- How the joint is cleaned and prepared
- Is the old sealant removed completely?
Towns and villages near Hackney Wick
More services for Hackney Wick
Hackney Wick buildings and the weather
In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as St Mary of Eton, an extension built onto an older house moves differently, and the joint between them takes the strain. Rented homes near Hackney Wick station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Hackney Wick is about 1 mile west of Stratford, in Greater London. Every kind of property in Hackney Wick is covered for external mastic. Every job comes with our 12-month guarantee. We cover 764 towns and villages across Greater London, large and small.
Here we cover the E3, E9 and E20 postcode area for external mastic. If you need external mastic at a property on Wick Lane, Dace Road and Wyke Road or a nearby road, our applicators can take on the job. We also cover Fish Island (1 mile south), Donnybrook Quarter (1 mile south-west), Old Ford (1 mile south), Temple Mills (1 mile north-east) and East Village (1 mile north-east). Further out, we also cover London (4 miles south-west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (4 miles west) and Shoreditch (3 miles south-west).
Around Hackney Wick
Locally, jobs take us to homes and businesses close to Mulberry UTC, Mabley Green and Mulberry UTC, among other places. Hackney Wick has its own railway station: Hackney Wick station. A little further out are Tower of London (3.3 miles south-west) and V&A East (under half a mile east). Green spaces nearby include Tower Hill and Old Ford Island.