Greater London · England
External & façade joints in Mitcham, Greater London
External mastic for Mitcham, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Weeds or debris growing in open joints
- Joints pointed up with cement by mistake
- Failed sealant between panels on a façade
Can I do it myself?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
About our external mastic in Mitcham
On houses, flats and commercial buildings across Mitcham, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. If you are dealing with brick movement joints where the sealant has split and rigid filler in a joint that should flex, we can help, whatever the surface.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in Mitcham, tell us how high the joints are and how to reach the back of the building.
Big or small, you get the same 12-month guarantee in Mitcham and across Greater London.
- Where
- Mitcham (CR4, SW16, SM4)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to Mitcham
More services for Mitcham
Leave it or put it right?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way, and access only has to be arranged once. In a flat in Mitcham, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Why book with us
- 4.9 on Google from 180+ five-star reviews
- Arbo and Everbuild products
- You choose the colour before work begins
- Full insurance on every job
Take a look at how sealant jobs are priced or what customers say.
How we quote for external mastic
The quote reflects the job in front of us. We look at:
- Working hours on commercial sites
- The size of the job
- How many areas need sealing
- Which sealant suits the joint
What you pay reflects the work, not guesswork. That is why we ask about the job first and agree the price before starting.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
- Pictures of the joints, sent by email
- The type of property
Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job, and we’ll take it from there.
Questions from Mitcham
Can you do external mastic in Mitcham?
Yes, Mitcham is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Can you help a landlord with a rental near Mitcham Eastfields station?
Yes. We work for landlords and letting agents as well as homeowners. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
How long does the job take?
A typical job takes anything from a few hours to several days, depending on the building. We will confirm how long when we quote.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Do you guarantee your work?
Yes, for a year. If there’s a problem with our work in that time, tell us and we will put it right.
Can a movement joint be filled with mortar?
No. Rigid materials can’t move with the wall. Where a joint has been mortared, it can often be raked out and sealed properly.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
Do you need external mastic in Mitcham?
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 new sealant then lets go long before it should.
Common reasons people contact us are:
- Failed seals between different materials
- Leaking joints around cladding and façade panels
- Weathered mastic that no longer stretches
- Rain getting behind render or cladding at a joint
As a London address, Mitcham can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- What the quote includes, VAT included or not
- Whether all the old sealant comes out first
- Whether you can choose the colour
- What guarantee comes with the work
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
- Loose or hollow render, which needs re-rendering
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Copings & trims
- Joints between brick and frames
What we do, step by step
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes anything from a few hours to several days, depending on the building. In Mitcham, 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.
- First we look over the joints with you, agree which to renew and talk through access.
- 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.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Move anything stored near the joints
- For business premises, tell us about site rules or sign-in
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
To get a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. We will send you a clear quote before any work starts.
Advice
How to look after the new joints
A little care helps the new joints last. Our advice:
- Avoid pressure-washing directly into sealant joints
- Tell anyone working on the walls about the movement joints
- Act on the first splits you see
- Leave the joints unpainted unless we’ve said otherwise
Keep pressure washers away from the sealant. High-pressure water can lift the edges.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years.
Outside joints around Mitcham
Historic houses like Southside House (about 3.6 miles west) are a reminder that the area around Mitcham has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
Schools such as St Thomas of Canterbury Catholic Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you let a flat or house near Mitcham Eastfields station, outside joints that have cracked can let damp into a rental, so check them between lets.
Mitcham is about 2 miles west of Thornton Heath, in Greater London. For external mastic in and around Mitcham, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover Greater London from our Crawley base, Mitcham included. Across Greater London, we cover 764 places, and Mitcham is one of them. There’s also a page for London, roughly 7 miles from Mitcham.
Every address in CR4, SW16 and SM4 is within our area for external mastic, from the main roads to the quietest streets. Whether your property is on Kings Road, Baker Lane and Manor Road or anywhere close by, we can help. We also cover the places around Mitcham: Hackbridge (1 mile north), Eastfields (1 mile north), Colliers Wood (1 mile north-west), Merton Abbey (2 miles north-west) and Furzedown (2 miles north). We also work in nearby towns such as London (7 miles north), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (7 miles north), St Pancras (9 miles north) and Shoreditch (9 miles north).
Near you in Mitcham
Locally, jobs take us to homes and businesses close to The Archbishop Lanfranc School, St Mark's Church of England Academy and The White Lion of Mortimer pub, among other places. For rail, the closest station is Mitcham Eastfields station, roughly 0.5 miles north of the centre. Other landmarks nearby include Wandle Industrial Museum (0.7 miles west) and Centrale Croydon (2.7 miles south-east). Green spaces nearby include Duppas Hill and Cranmer Green.