Greater London · England
External & façade joints in West End, Greater London
We cover West End for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Gaps where render, brick and frames meet
- Hard, crazed mastic that has stopped moving
- Panel joints letting water in
The process
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours to a few days, depending on the length of joint and the access. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in West End. A visitor permit or a nearby bay makes the visit run more smoothly.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Keep children and pets away from the work area
- Tell us about any water getting in
Getting a quote
For external mastic in West End, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Advice
External mastic in West End, done properly
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. We work on joints between brick and frames, copings & trims and concrete & block, and the jobs we see most are leaking joints around cladding and façade panels and hard, crazed mastic that has stopped moving.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in West End, tell us how high the joints are and how to reach the back of the building.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Place
- West End (W1F, W1D, W1T)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Quotes for external mastic in West End
We do not publish a price list, because no two jobs are the same. What we look at:
- The type of sealant required
- Any mould that needs treating
- The number of rooms or windows
- When we can work, for business premises
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Helping us quote
Photos help, but a description is a good start. Please mention:
- Where the job is, and your postcode
- Any access issues, like height or stairs
- The rough size of the job
- Photos by email, if that is easy
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To get started, phone 0345 464 0079 or drop us an email.
How to look after the new joints
After the cure time, these simple habits help:
- Fix overflowing gutters above sealed joints
- Do not let climbing plants root in the sealant
- Avoid pressure-washing directly into sealant joints
- Never let anyone fill a movement joint with mortar
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams in West End and across Greater London. Several sites can be quoted together.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Do you need external mastic in West End?
If plants are growing out of a joint, the sealant has generally failed or was never there. Dirt and roots then trap moisture in the joint and speed up the damage.
If you can see any of these, it’s time to have the joints looked at:
- Old sealant gone brittle and cracked
- Plants rooting in failed movement joints
- Leaking joints around cladding and façade panels
- Movement joints with cracked, split or missing sealant
If you live in an older home near St Mary's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What your quote should include
- What guarantee comes with the work
- What preparation is included
- Whether VAT is included
- How hidden problems are handled
Questions from West End
Can you do external mastic in West End?
Yes. Our work covers London and the South East, and West End is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Is parking an issue for external mastic in West End?
Parking in West End, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
When is the sealant fully cured?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.
Why is there a gap in my brick wall?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Will you leave a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
How long does external mastic last?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly.
Towns and villages near West End
More services for West End
Surface by surface
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so the movement is taken up.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. The sealant is chosen with that in mind.
What happens if it’s left?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost around the joint, so the damage spreads beyond the joint. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why West End customers choose us
- ARBOMaster approved applicator
- Sealant colour chosen to suit
- One-year guarantee on every job
- 180+ five-star Google reviews
External mastic in West End: local notes
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Benjamin Franklin House (about 0.4 miles south) are a reminder that the area around West End 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.
Schools such as Soho Parish CofE Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. Rented homes near Tottenham Court Road station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
West End is about 1 mile east of City of Westminster, in Greater London. West End gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 764 towns and villages across Greater London, from the larger towns to small villages.
We work across W1F, W1D and W1T for external mastic and the streets around it. Local streets include Duck Lane, Drury Lane and Bridle Lane, all of which we cover. West End sits on or near the A301 and A400. Neighbouring places we cover for external mastic include Seven Dials (1 mile east), St Giles (1 mile north-east), Soho (1 mile west), Chinatown (1 mile south-west) and Covent Garden (1 mile east). Within a short drive, we also cover Kensington (3 miles west), Walthamstow (7 miles north-east), Whitechapel (3 miles east), Hampstead (4 miles north-west), Ruislip (13 miles west) and Stockwell (3 miles south).
Landmarks near West End
Locally, jobs take us to homes and businesses close to LSE Shaw Library, Brewdog pub and St Anne's Churchyard. Also close by are Harris Westminster Sixth Form (1 mile south) and LITE Regal International School (0.7 miles west). West End has its own railway station: Tottenham Court Road station. Other landmarks nearby include St Paul's Hospital (less than half a mile north-east) and Leverian collection (less than half a mile south). The countryside around West End includes St. James's Park Lake and Barnsbury Wood.