Greater London · England
Stoke Newington External Mastic
External mastic across Stoke Newington and nearby, with old sealant always removed completely and a 12-month guarantee.
- Damp patches traced to an open external joint
- Failed sealant between panels on a façade
- Weathered mastic that no longer stretches
External mastic for homes and businesses in Stoke Newington
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the line blends in. If you are dealing with old sealant gone brittle and cracked and joints pointed up with cement by mistake, we can put it right.
London’s terraces and conversions often share walls, gutters and downpipes with their neighbours, so one failed joint can cause damp for more than one household. In a converted house in Stoke Newington, it’s worth checking who is responsible for the outside before booking.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Stoke Newington (N16, N4)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Stoke Newington, the repair is bigger than a sealant job.
The cost depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Why Stoke Newington customers choose us
- Colour picked to suit the job
- Over 20 years’ experience
- Tidy, careful work
- We agree the colour with you first
Common questions in Stoke Newington
Is parking an issue for external mastic in Stoke Newington?
Parking in Stoke Newington, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Do you cover Stoke Newington for external mastic?
Yes. We work across London and the South East, and Stoke Newington is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we are done.
Do you have insurance?
Yes, we are fully insured for domestic and commercial work.
How long will you be here?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Can a movement joint be filled with mortar?
No. Cement or mortar can’t stretch. If it has already been filled, we can normally cut it out and reseal it.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we are using.
Do you need external mastic in Stoke Newington?
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it cannot stretch and tears as soon as the joint widens.
The problems people generally mention when they call are:
- Old sealant gone brittle and cracked
- Sealant that has lost its bond to the brick or render
- Damp patches traced to an open external joint
- Joints with sealant missing in places
For site and facilities teams at buildings such as St Mary's Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- Is VAT in the price?
- What the cure time is
- Are they insured?
- What happens if the job turns out different
What we cannot put right
Before you book, it’s worth knowing the limits too:
- Loose or hollow render, which needs re-rendering
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Structural movement, which needs a surveyor or engineer
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think.
Where we work in Stoke Newington
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Render & cladding joints
- Copings & trims
Towns and villages near Stoke Newington
More services for Stoke Newington
Surface by surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. A primer goes on where the product requires one.
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
External mastic in Stoke Newington: local notes
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Sutton House (about 1.7 miles south-east) nearby, there’s older building stock in the area around Stoke Newington as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
As a London address, Stoke Newington can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. For landlords with property near Stoke Newington station, outside joints that have cracked can let damp into a rental, so check them between lets.
Stoke Newington is about 2 miles north-west of Hackney, in Greater London. Across the N16 area, our applicators can take on external mastic. Across Greater London, we cover 764 places, and Stoke Newington is one of them.
We cover every part of the N16 and N4 postcode area for external mastic. If you need external mastic at a property on Schonfeld Square, Stoke Newington High Street and Lordship Terrace or a nearby road, we can help. You will find Stoke Newington on the A503 and B104, so it’s easy for us to get to. We also cover the places around Stoke Newington: West Hackney (1 mile east), Stamford Hill (1 mile north-east), Newington Green (1 mile south), Manor House (1 mile north-west) and Shacklewell (1 mile south-east). Within a short drive, we also cover London (4 miles south), City of Westminster (5 miles south-west), Marylebone (4 miles south-west), Kensington (7 miles south-west), St Pancras (3 miles south-west) and Shoreditch (3 miles south).
Around Stoke Newington
Typical jobs here are in homes near Abney Park, Rose and Crown pub and Stoke Newington School and Sixth Form. You’ll also find Stoke Newington School and Sixth Form (less than half a mile south) and Church of St Andrew (0.5 miles north). Stoke Newington’s nearest station is Stoke Newington station, roughly 0.5 miles east. Well-known places in the area include Hackney Walk (1.8 miles south-east) and Arsenal Football Club Museum (1.2 miles west). Open spaces near Stoke Newington include Woodberry Wetlands and Hollow Pond.
How it works
On the day, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before we start. Most jobs take a few hours to a few days, depending on the length of joint and the access. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Stoke Newington. It helps if you can point us to a visitor permit or a bay close to the door.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
- Let us know about stairs, lifts or work at height
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Advice
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.