Greater London · England
External Mastic in Cambridge Heath
Problem with your movement joints in Cambridge Heath? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Plants rooting in failed movement joints
- Failed seals between different materials
- Movement joints filled with mortar instead of sealant
Outside joints around Cambridge Heath
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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Cambridge Heath station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. Managing a site like Mowlem Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Cambridge Heath is about 1 mile north-east of Shoreditch, in Greater London. Whether you’re in the middle of Cambridge Heath or further out, we cover external mastic for every kind of property. Our Greater London coverage runs to 764 places, and Cambridge Heath is one of them.
Work in E2, E8 and E9 works the same way as everywhere else we cover. You will find streets such as Gore Road, Ion Square and Globe Road, all of which we cover. Neighbouring places we cover for external mastic include London Fields (1 mile north-west), Bethnal Green (1 mile south-west), Hackney Central (1 mile north), Hackney (1 mile north-east) and Haggerston (1 mile west). We also work in nearby towns such as London (3 miles south-west), City of Westminster (4 miles west), Marylebone (4 miles west), Kensington (7 miles west), St Pancras (3 miles west) and Walthamstow (4 miles north).
Local landmarks in Cambridge Heath
Locally, jobs take us to homes and businesses close to Bishopsgate Institute Special Collections and Archives, Young and Talented School of Stage and Screen and Raine's Foundation School. Also close by are The Victory pub (within half a mile south) and Haggerston Park (0.5 miles west). Cambridge Heath has its own railway station: Cambridge Heath station. Well-known places in the area include Cell Project Space (under half a mile south) and Tower of London (2 miles south-west). Not far away are Tower Hill and Old Ford Island.
External mastic for homes and businesses in Cambridge Heath
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two. If you have hard, crazed mastic that has stopped moving and weeds or debris growing in open joints, we can help, on façade panels, copings & trims and concrete & block alike.
Outside work in London starts with access: side passages, upper floors and where to park. For a home in Cambridge Heath, tell us how high the joints are and how to reach the back of the building.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Cambridge Heath (E2, E8, E9)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What affects the quote in Cambridge Heath
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How much old sealant there is and how hard it is to remove
- When we can work, for business premises
- Whether the work is at height
- How many areas need sealing
The cost depends on the amount of work, how much old material has to come out and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Asking for a quote
There’s no need for technical detail. Just tell us:
- What’s wrong with the joints now
- Where the job is, and your postcode
- Roughly how big the job is
- If someone has resealed it before
We do not publish a price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Walk round the building once a year and look at the joints
- Never let anyone fill a movement joint with mortar
- Keep soil, plants and ivy away from the joints
- Tell anyone working on the walls about the movement joints
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage.
Common questions in Cambridge Heath
I let a flat near Cambridge Heath station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
Can parking be tricky for a visit in Cambridge Heath?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do you hold any approvals?
Yes. We are an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few photos.
Do you come to Cambridge Heath?
Yes. We work in Cambridge Heath, as part of our work across South East England, London and Scotland. For a quote, phone 0345 464 0079 or drop us an email.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Do you have insurance?
Yes. We’re fully insured for domestic and commercial work.
Can you seal joints between render and window frames?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
What happens if it’s left?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Cambridge Heath, the repair is bigger than a sealant job.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why Cambridge Heath customers choose us
- More than 20 years in sealant work
- 4.9 on Google from 180+ five-star reviews
- Neat joints and a tidy finish
- Colour agreed with you before any work starts
Take a look at how sealant jobs are priced or what customers say.
Nearby places to Cambridge Heath
What else we do in Cambridge Heath
Different surfaces, different methods
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and protects the render itself.
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible.
Do you need external mastic in Cambridge Heath?
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Common reasons people contact us include:
- Plants rooting in failed movement joints
- Sealant that has lost its bond to the brick or render
- Damp patches traced to an open external joint
- Brick movement joints where the sealant has split
As a London address, Cambridge Heath can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Comparing quotes
- The length of the guarantee
- Whether all the old sealant comes out first
- How long to leave it before use
- How much experience the applicator has
What we do, step by step
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a handful of joints, longer for a whole elevation. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Cambridge Heath. A visitor permit or a nearby bay makes the visit run more smoothly.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- For indoor joints, keep the area dry beforehand if you can
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or send us an email and describe the job.