Greater London · England
External & façade joints in Bishopsgate, Greater London
Sealing brickwork movement joints, render, cladding and façade joints in Bishopsgate, with a 12-month guarantee on every job. Ask us for a quote.
- Moss and dirt in joints with no sealant left
- Old sealant gone brittle and cracked
- Joints pointed up with cement by mistake
About our external mastic in Bishopsgate
Low-level joints can generally be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we will confirm what’s needed to reach them safely. Common call-outs are for joints where the bead has come unstuck and damp patches traced to an open external joint, across concrete & block, brickwork movement joints and joints between brick and frames.
Outside work in London starts with access: side passages, upper floors and where to park. In Bishopsgate, joints up high may need ladders or other access, which is worth talking through when you book.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
- Location
- Bishopsgate (E1, EC2A, EC1Y)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Bishopsgate questions
Can you help a landlord with a rental near London Liverpool Street station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
Do you cover Bishopsgate for external mastic?
Yes, Bishopsgate is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we will send you a clear quote.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
How do you reach high-level joints?
Each building is different. Send us photos and a rough idea of the height, and we will confirm what access is needed.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Should I try DIY first?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
What does external mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
What is a movement joint?
Most straight vertical gaps in brickwork are movement joints. It lets the bricks expand without cracking, and it should be sealed with a flexible sealant.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’re 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 fails, we can still redo it.
What affects the quote in Bishopsgate
We quote each job individually. These are the things that affect it:
- The old material and how stubborn it is
- Which sealant suits the joint
- The number of rooms or windows
- The amount of work
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
Helping us quote
To help us quote quickly, let us know:
- How we’d reach the joints
- A few photos by email, if you can
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
Want a quote for external mastic? Please phone 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and give you a clear quote before we start.
Bishopsgate buildings and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Mansion House (about 0.4 miles south-west) are a reminder that the area around Bishopsgate has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
As a London address, Bishopsgate can be tricky for parking: let us know about parking bays, permits or a driveway. In the older streets around Church of St Ethelburga, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Bishopsgate is about 1 mile north-east of London, in Greater London. Jobs in Bishopsgate get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. 764 places in Greater London are on our list, large and small.
Here we cover the E1, EC2A and EC1Y postcode area for external mastic. Whether your property is on Bush Lane, Swan Lane and Love Lane or anywhere close by, our applicators can take on the job. Being close to the A3 and A10, Bishopsgate is simple for us to get to. Nearby, we also carry out external mastic in Aldgate (1 mile south-east), Spitalfields (1 mile east), City of London (1 mile west), Tower Hill (1 mile south) and Whitechapel (1 mile east). Larger places within reach include City of Westminster (3 miles west), Marylebone (3 miles west), Kensington (5 miles west), Walthamstow (5 miles north-east), Hampstead (5 miles north-west) and Ruislip (15 miles west).
What’s near Bishopsgate
We work in homes and buildings around Bishopsgate Institute Special Collections and Archives, St Mary-at-Hill and The Aldgate School, among other places. Nearby too are White Hart pub (within half a mile north-east), Central Foundation Boys' School (0.7 miles north) and Finsbury Circus (under half a mile north-west). Bishopsgate has its own railway station: London Liverpool Street station. Nearby you will also find London Bridge Hospital (0.7 miles south) and Gabriel's Wharf (1.2 miles south-west). Green spaces nearby include St. James's Park Lake and Tower Hill.
Towns and villages near Bishopsgate
What else we do in Bishopsgate
When to call us in Bishopsgate
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.
These are the problems we’re asked about most:
- Cracked joints where brick meets render or frames
- Weeds or debris growing in open joints
- Movement joints filled with mortar instead of sealant
- Failed sealant between panels on a façade
For site and facilities teams at buildings such as The London School of Barbering, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What to look for in a quote
- What guarantee comes with the work
- Are they insured?
- How long to leave it before use
- Which sealant they’ll use, and why
What sealant work can’t fix
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Cracks in the bricks or render themselves, away from the joints
- Subsidence or other structural problems
- Walls that need new movement joints cut into them
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
Where we work in Bishopsgate
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Render & cladding joints
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
For anyone letting property in or around Bishopsgate, several properties can go on one quote. Just tell us the addresses and what each one needs.
What happens on the day
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the work takes a few hours to a few days, depending on the length of joint and the access in most cases. For a job in Bishopsgate, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Try not to wet indoor joints just before the visit
- Mention any parking rules near the property
Getting 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.
Related advice
Looking after it afterwards
After the cure time, these simple habits help:
- Have failed joints looked at early
- Deal with leaking gutters that soak the joints below
- Leave the joints unpainted unless we’ve said otherwise
- Never let anyone fill a movement joint with mortar
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.
Once a joint cannot move, the wall finds another way, usually as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.