Greater London · England
External & façade joints in Bloomsbury, Greater London
We cover Bloomsbury for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Movement joints filled with mortar instead of sealant
- Hard, crazed mastic that has stopped moving
- Rain getting behind render or cladding at a joint
How we handle external mastic in Bloomsbury
Low-level joints can usually be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what’s needed to reach them safely. If you’re dealing with rigid filler in a joint that should flex and joints with sealant missing in places, we can help, whatever the surface.
Outside work in London starts with access: side passages, upper floors and where to park. In Bloomsbury, joints up high may need ladders or other access, which is worth talking through when you book.
Big or small, you get the same one-year guarantee in Bloomsbury and across Greater London.
- Place
- Bloomsbury (NW1W, W1T, NW1)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Keep high-pressure jets off the joints
- Keep movement joints as flexible joints, not mortar
- Keep water from gutters off the wall
- Act on the first splits you see
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
Bloomsbury buildings and the weather
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. Historic houses like Dr Johnson's House (about 0.9 miles south-east) are a reminder that the area around Bloomsbury 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.
For an older house near a landmark such as St George the Martyr Holborn, older walls, gutters and the joints where extensions meet them need a flexible sealant. If you let a flat or house near London Euston station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Bloomsbury is about 1 mile north-east of City of Westminster, in Greater London. Homes, rented property, offices and hotels in Bloomsbury can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Bloomsbury is one of 764 towns and villages in Greater London where we work.
Here we cover the NW1W, W1T and NW1 postcode area for external mastic. If you need external mastic at a property on Drury Lane, Euston Road and Duke's Road or a nearby road, our applicators can take on the job. Bloomsbury is on the A401 and A501, which makes it straightforward to reach. We also cover St Pancras (1 mile north-east), Euston (1 mile north-west), Kings Cross (1 mile north), Holborn (1 mile east) and Fitzrovia (1 mile west). Larger places within reach include Kensington (4 miles south-west), Walthamstow (6 miles north-east), Hampstead (3 miles north-west), Ruislip (13 miles west), Brompton (3 miles south-west) and Stockwell (4 miles south).
Local landmarks in Bloomsbury
Locally, jobs take us to homes and businesses close to Lincoln's Inn Fields, Pilsudski Institute of London and St George the Martyr Church of England Primary School and the streets around them. Other local landmarks include Queens Larder Public House (within half a mile south-east) and Maria Fidelis Catholic School FCJ (0.6 miles north-west). The nearest railway station is London Euston station, roughly 0.6 miles north-west. Well-known places in the area include Montfichet's Tower (1.2 miles south-east) and National Hospital for Neurology and Neurosurgery (within half a mile south-east). The countryside around Bloomsbury includes Barnsbury Wood and Ludgate Hill.
Common problems we fix in Bloomsbury
If plants are growing out of a joint, the sealant has usually failed or was never there. Dirt and roots then trap moisture in the joint and make things worse.
Common reasons people contact us are:
- Movement joints with cracked, split or missing sealant
- Rain getting behind render or cladding at a joint
- Weeds or debris growing in open joints
- Cracked joints where brick meets render or frames
Managing a site like UCL School of Slavonic and East European Studies? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What to look for in a quote
- Who turns up on the day
- Whether all the old sealant comes out first
- Whether the sealant suits the joint
- What guarantee comes with the work
When it isn’t the sealant
We will not take on work that won’t last, so here’s what sealant cannot put right:
- Adding movement joints to masonry that has none
- Cracking across the wall rather than at a joint
- Structural movement, which needs a surveyor or engineer
If you’re not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in Bloomsbury
- Concrete & block
- Façade panels
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
FAQs for Bloomsbury
Can you do external mastic in Bloomsbury?
Yes, Bloomsbury is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we’ll send you a clear quote.
Do you work for landlords with property near London Euston station?
Yes. We work for letting agents and landlords as well as homeowners. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Do you work at height?
It depends on the building. Where joints can be reached safely, we will do them. Give us some details and we will confirm the access.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply ring 0345 464 0079 or send us an email.
Are you insured?
Yes. We’re fully insured for domestic and commercial work.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you do try it yourself, take your time over the 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.
What we do, step by step
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to several days, depending on the building. In a London area like Bloomsbury, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
- Mention any sign-in or site rules at work premises
How to get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.
Advice
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Nearby places to Bloomsbury
What else we do in Bloomsbury
How we quote for external mastic
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- How easy the joints are to reach
- Working hours on commercial sites
- How much there is to do
Combining jobs into one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Helping us quote
When you contact us, it’s useful to know:
- If it’s domestic, commercial or a hotel
- The rough size of the job
- The problem you’ve noticed
- Any access issues, like height or stairs
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or drop us an email.