Greater London · England
External & façade joints in Old Town, Greater London
Sealing brickwork movement joints, render, cladding and façade joints in Old Town, with a one-year guarantee on every job. Call for a quick quote.
- Rigid filler in a joint that should flex
- Panel joints letting water in
- Joints where the bead has come unstuck
How we handle external mastic in Old Town
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. If you have movement joints with cracked, split or missing sealant and joints pointed up with cement by mistake, we can put it right, on joints between brick and frames, render & cladding joints and façade panels alike.
Outside work in London starts with access: side passages, upper floors and where to park. In Old Town, joints up high may need ladders or other access, which is worth talking through when you book.
Each job carries a 12-month guarantee, large or small.
- Where
- Old Town (CR0, CR9, CR90)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How we quote for external mastic
We don’t publish a price list, because no two jobs are the same. What we look at:
- Working hours on commercial sites
- How many rooms, windows or areas are involved
- Which sealant suits the joint
- Whether there’s mould to deal with
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or email us and we will give you an honest view and a quote.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- If it’s domestic, commercial or a hotel
- Photos by email, if that’s easy
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
Your questions about external mastic in Old Town
Can you do external mastic in Old Town?
Yes. We work across London and the South East, and Old Town is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing.
Can parking be tricky for a visit in Old Town?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Can you match the colour of my brickwork?
The sealant colour is picked to suit the wall, so the joint sits quietly in the wall. Exterior sealants come in a good range of colours.
What is backing rod for?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We will tell you what we are using and why.
How long does the job take?
A typical job takes anything from a few hours to several days, depending on the building, including preparation and clearing up. Your quote will say how long we expect yours to take.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint can’t move, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
Why it’s worth doing now in Old Town
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render around the joint, so the damage spreads beyond the joint. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in Old Town.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why us?
- Rated 4.9 stars on Google
- Domestic, commercial and hotel work
- You choose the colour before work begins
- A sealant colour to suit the surroundings
Also near Old Town
Other services in Old Town
What external mastic looks like in Old Town
Historic houses like Addington Palace (about 3 miles east) are a reminder that the area around Old Town has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near West Croydon station, split movement joints are easy to miss on a rental until damp shows inside. As a London address, Old Town can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Old Town is about 1 mile north-west of Croydon, in Greater London. Old Town gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Greater London, we cover 764 places, and Old Town is one of them. Our London page covers work nearby (9 miles or so).
Jobs for external mastic in CR0, CR9 and CR90 works the same way as everywhere else we cover. Local streets include Park Lane, Fell Road and Abbey Road, all of which we cover. We also cover Waddon (1 mile south-west), Broad Green (1 mile north), Beddington (1 mile west), Bandonhill (1 mile south-west) and Russell Hill (2 miles south-west). We also work in nearby towns such as London (9 miles north), City of Westminster (10 miles north), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (11 miles north) and Shoreditch (11 miles north).
Near you in Old Town
Locally, jobs take us to homes and businesses close to Rutherford School, The Gun Tavern and St Andrew's CofE School and the streets around them. Old Town has its own railway station: West Croydon station. Well-known places in the area include Croydon University Hospital (1.2 miles north) and Croydon Airport Visitor Centre (1.3 miles south-west). Not far away are Roundshaw Downs and Duppas Hill.
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We cut it out and start again.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
How the visit works
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes a few hours to a few days, depending on the length of joint and the access. For a job in Old Town, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- 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.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
How to prepare
- Tell us if parking is tricky
- Clear items away from the joints we are working on
- Let us know about earlier repairs to the joints
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or send us an email.
Read more
Do you need external mastic in Old Town?
If plants are growing out of a joint, the sealant has normally failed or was never there. Roots and dirt hold water against the wall and make things worse.
The problems people usually mention when they call include:
- Leaking joints around cladding and façade panels
- Damp patches traced to an open external joint
- Sealant that has lost its bond to the brick or render
- Failed seals between different materials
Schools such as The Minster Nursery and Infant School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Comparing quotes
- How the surfaces are prepared before sealing
- How long the guarantee is
- How long to leave it before use
- Who does the work, and how experienced they are
Different surfaces, different methods
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. The sealant is chosen with that in mind.
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.
Landlords, agents and businesses in Old Town
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.