Greater London · England
External & façade joints in Hackney Central, Greater London
External mastic in Hackney Central from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Water getting into walls through failed joints
- Gaps where render, brick and frames meet
- Plants rooting in failed movement joints
External mastic for homes and businesses in Hackney Central
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. We work on façade panels, copings & trims and concrete & block, and common reasons people get in touch are failed seals between different materials and weeds or debris growing in open joints.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so a leaking gutter joint or failed wall joint can affect more than one home. For a flat in Hackney Central, check the lease for who looks after the outside.
All of our work is guaranteed for twelve months, in Hackney Central and everywhere else we cover.
- Where
- Hackney Central (E8, E9, E2)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What the job involves on each 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.
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.
Leave it or put it right?
Running new sealant over the old bead rarely lasts. New sealant does not bond well to old, weathered sealant, so we always take the old sealant out. 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 Central, the repair is bigger than the sealant job would have been.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Hackney Central customers choose us
- We leave the area clean and tidy
- White, clear, grey or coloured to suit, where the product allows
- 4.9 on Google from 180+ five-star reviews
- Over 20 years’ experience
Take a look at our cost guide and our reviews.
Places near Hackney Central
What else we do in Hackney Central
The process
Before we leave, we go over the finished joints with you. The visit itself normally takes a few hours to a few days, depending on the length of joint and the access, depending on the size of the job. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Hackney Central. It helps if you can point us to a visitor permit or a bay close to the door.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Mention any tricky access
- Keep children and pets away from the work area
- Try not to wet indoor joints just before the visit
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or drop us an email.
Advice
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Look over the joints every year, ideally after winter
- Keep water from gutters off the wall
- Make sure movement joints are not pointed over
- Act on the first splits you see
Only paint over the joint if we’ve confirmed the sealant can take paint. Many exterior sealants aren’t designed to be painted and spoil the finish.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.
External mastic in Hackney Central: local notes
With historic houses such as Sutton House (about 0.5 miles north-east) nearby, there’s older building stock in the area around Hackney Central 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 check who is responsible for the outside before booking.
Homes close to Church of St Michael and All Angels include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain. Managing a site like Gayhurst Community School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Hackney Central is about 1 mile north-east of Hoxton, in Greater London. We provide external mastic to homes and businesses in Hackney Central and the surrounding area, as part of our work across Greater London. Hackney Central is one of 764 towns and villages in Greater London we cover.
Our applicators cover all of E8, E9 and E2 for external mastic and the streets around it. External mastic is available to properties on Brett Road, Tudor Road and Forest Road. You will find Hackney Central on the A107 and A1207, so it’s easy for us to get to. Other places close to Hackney Central include London Fields (1 mile south), Dalston (1 mile west), Hackney (1 mile east), Cambridge Heath (1 mile south) and Kingsland (1 mile west). Further out, we also cover London (3 miles south-west), City of Westminster (4 miles south-west), Marylebone (4 miles south-west), Kensington (7 miles south-west), St Pancras (3 miles south-west) and Walthamstow (3 miles north-east).
Local landmarks in Hackney Central
Typical jobs here are in homes near Haggerston Park, The Urswick School - A Church of England Secondary School and The Urswick School, among other places. Other local landmarks include Bishopsgate Institute Special Collections and Archives (1.9 miles south-west) and Baxter's Court pub (within half a mile north-east). There’s a railway station in Hackney Central itself: London Fields station. Well-known places in the area include German Hospital (less than half a mile north-west) and Hackney Walk (0.5 miles north-east). For a walk, there’s Old Ford Island and Tower Hill.
Your questions about external mastic in Hackney Central
Can parking be tricky for a visit in Hackney Central?
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.
I let a flat near London Fields station. Can you help?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.
Will you leave a mess?
Tidy work is part of the job. We protect what’s around the joints, and the area is left clean when we finish.
Do you work in Hackney Central?
Yes. We’re based in Crawley and work across South East England, London and Scotland.
Is it OK to fill a movement joint with cement?
No. Rigid materials can’t move with the wall and the joint fails. Where a joint has been mortared, it can often be raked out and sealed properly.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
Signs you need external mastic in Hackney Central
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. The joint cannot move, so the wall cracks somewhere else instead.
Any of these means the joints need attention:
- Cracked joints where brick meets render or frames
- Joints pointed up with cement by mistake
- Rain getting behind render or cladding at a joint
- Movement joints with cracked, split or missing sealant
Hackney Central is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What your quote should include
- Whether you can choose the colour
- What guarantee comes with the work
- Are they insured?
- Whether they seal over old material or remove it
How we quote for external mastic
The quote reflects the job in front of us. We look at:
- How easy the joints are to reach
- How many rooms, windows or areas are involved
- The number and length of the joints
- The type of sealant required
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, ring 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Any previous sealing or DIY work
- How we’d reach the joints
- Where the property is
- Whether it’s a home or a business
Want a quote for external mastic? Please ring 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear quote before we start.
When it is not the sealant
We’ll always be straight with you, so here’s what sealant cannot fix:
- Movement that is more than a sealant joint can take
- Render that is blown, hollow or coming away
- Adding movement joints to masonry that has none
If you’re not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before booking.
What we seal
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
- Concrete & block