Greater London · England
External & façade joints in Farringdon, Greater London
Movement joints in Farringdon need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Movement joints filled with mortar instead of sealant
- Cracked joints where brick meets render or frames
- Old sealant gone brittle and cracked
External mastic in Farringdon, done properly
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. We pick a colour that sits well with the wall so the joint does not stand out. If you are dealing with old sealant gone brittle and cracked and plants rooting in failed movement joints, we can put it right.
London’s terraces and conversions often share walls, gutters and downpipes with their neighbours, so a leaking gutter joint or failed wall joint can affect more than one home. For a flat in Farringdon, check the lease for who looks after the outside.
A one-year guarantee comes as standard.
- Where
- Farringdon (EC1V, EC1R, EC1P)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Farringdon
Can you help a landlord with a rental near Farringdon station?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Is Farringdon in your area for external mastic?
Yes. Our work covers London and the South East, and Farringdon is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
Is there any odour?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
Can new sealant go over the old?
No, it won’t last. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Do you hold any approvals?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint cannot move, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is generally a movement joint. It gives the wall room to move, and it should be sealed with a flexible sealant.
Landlords, agents and businesses in Farringdon
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
If you manage several properties in or around Farringdon, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Why it’s worth doing now in Farringdon
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and doesn’t last, so it pays to do it properly once. 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 Farringdon, the repair is bigger than the sealant job would have been.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and give you a clear quote before any work starts.
Why Farringdon clients choose us
- We never seal over old sealant
- We leave the area clean and tidy
- Sealant colour chosen to suit
- Colour agreed with you before we start
Read what affects the cost or customer reviews.
Nearby places to Farringdon
Other services in Farringdon
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Check the sealant is paintable before painting near it
- Fix overflowing gutters above sealed joints
- Clear growth from the base of walls and joints
- Show decorators and builders where the movement joints are
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.
What we cannot put right
Sealant is not the answer to every problem, and we will tell you before work begins. It will not solve:
- Cracks in the bricks or render themselves, away from the joints
- Movement that is more than a sealant joint can take
- Render that is blown, hollow or coming away
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Brickwork movement joints
- Façade panels
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
How it works
The work is kept neat and contained to the joints we’re treating, so you can get on with your day. The job generally takes anything from a few hours to several days, depending on the building. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- 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.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Mention any parking rules near the property
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Related advice
What affects the quote in Farringdon
We quote each job individually. This is what makes a difference:
- Which sealant suits the joint
- Whether there’s mould to deal with
- The size of the job
- How easy the joints are to reach
Leaving a failed joint generally makes the job bigger, not smaller. If you are unsure, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
What we need to know
When you contact us, these details help:
- Roughly how big the job is
- Photos by email, if that is easy
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
For a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before any work starts.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Outside joints around Farringdon
In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Farringdon station? Then split movement joints are easy to miss on a rental until damp shows inside. Farringdon is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Managing a site like Charterhouse Square School? Then its movement joints, gutters and trims need looking after like any other building’s.
Farringdon is about 2 miles north of London, in Greater London. Farringdon gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Farringdon is one of 764 towns and villages in Greater London we cover.
Here we cover the EC1V, EC1R and EC1P postcode area for external mastic. Whether your property is on Oat Lane, Shoe Lane and Long Lane or anywhere close by, our applicators can take on the job. Farringdon sits on or near the A1 and A4. Nearby, we also carry out external mastic in Smithfield (1 mile south), Clerkenwell (1 mile north), Holborn (1 mile west), Blackfriars (1 mile south) and Temple Bar (1 mile south-west). We also work in nearby towns such as Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (4 miles north-west), Ruislip (14 miles west), Brompton (3 miles south-west) and Stockwell (4 miles south).
What’s near Farringdon
In Farringdon, that means homes and buildings near The Castle Public House, St Mary-at-Hill and Barts Health Archives and the streets around them. You’ll also find St Peter and St Paul RC Primary School (under half a mile north), Barbican Conservatory (less than half a mile east) and Central Foundation Boys' School (0.8 miles east). Farringdon has its own railway station: Farringdon station. Other landmarks nearby include Museum of the Order of St John (under half a mile north-east) and Gabriel's Wharf (0.9 miles south). For a walk, there’s Ludgate Hill and Barnsbury Wood.