Greater London · England
External Mastic in Victoria
Sealing brickwork movement joints, render, cladding and façade joints for Victoria, backed by a one-year guarantee. Ask us for a quote.
- Weathered mastic that no longer stretches
- Sealant pulling away from one side of the joint
- Damp patches traced to an open external joint
How we handle external mastic in Victoria
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. Common call-outs are for hard, crazed mastic that has stopped moving and leaking joints around cladding and façade panels, across render & cladding joints, brickwork movement joints and copings & trims.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in Victoria, 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.
- Location
- Victoria (SW1V, SW1P, SW1X)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in Victoria
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
How the visit works
We bring everything the job needs with us, so there’s nothing for you to buy. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In a London area like Victoria, 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.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Mention any parking rules near the property
- Mention any tricky access
- Tell us about any previous sealing or DIY attempts
How to get a quote
If you’re in Victoria and need external mastic, phone 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
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External mastic in Victoria: local notes
London terraces and converted houses often share gutters, downpipes and walls, 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 London Victoria station? Then split movement joints are easy to miss on a rental until damp shows inside. Managing a site like St Peter's Eaton Square CofE Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Victoria is about 1 mile south of City of Westminster, in Greater London. From the centre of Victoria to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Our area takes in 764 places across Greater London, from the larger towns to small villages.
Every address in SW1V, SW1P and SW1X is within our area for external mastic, from the main roads to the quietest streets. That includes homes and businesses on Eaton Lane, Gerald Road and Wilton Road. With the A202 and A302 close by, Victoria is simple for us to get to for external mastic. Other places close to Victoria include Belgravia (1 mile north-west), Pimlico (1 mile south-east), Westminster (1 mile north-east), Millbank (1 mile north-east) and Brompton (1 mile west). Further out, we also cover Shoreditch (4 miles north-east), Walthamstow (8 miles north-east), Hoxton (4 miles north-east), Whitechapel (4 miles north-east), Hampstead (4 miles north) and Ruislip (13 miles north-west).
Local landmarks in Victoria
We work in homes and buildings around Westminster Cathedral Choir School, Wetherspoons pub and Green Park, among other places. Nearby too are Westminster City School (within half a mile north-east) and London Library (0.9 miles north). There’s a railway station in Victoria itself: London Victoria station. Nearby you will also find Baynard's Castle (2.2 miles north-east) and Harrods (0.9 miles west). The countryside around Victoria includes Ludgate Hill and St. James's Park Lake.
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Avoid pressure-washing directly into sealant joints
- Deal with leaking gutters that soak the joints below
- Act on the first splits you see
- Make sure movement joints are not pointed over
Do not paint over the new sealant unless we have said the product is paintable. Many exterior sealants aren’t designed to be painted and spoil the finish.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick.
Honest limits
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Loose or hollow render, which needs re-rendering
- Structural movement, which needs a surveyor or engineer
- Damp that isn’t coming from the joint
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
Joints and surfaces we work on
- Façade panels
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
Do you need external mastic in Victoria?
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
Signs it’s time to call us include:
- Movement joints filled with mortar instead of sealant
- Joints where the bead has come unstuck
- Rain getting behind render or cladding at a joint
- Plants rooting in failed movement joints
In the older streets around St. Michael's Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
What your quote should include
- How long the guarantee is
- What the quote includes, VAT included or not
- What product goes in the joint
- What the cure time is
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
Why deal with it now?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and does not last, so it pays to do it properly once. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.
Leaving a failed joint generally makes the job bigger, not smaller. If you’re unsure, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
What you get with us
- 4.9 on Google from 180+ five-star reviews
- Quality sealants from Arbo and Everbuild
- We never seal over old sealant
- Colour picked to suit the job
Take a look at how sealant jobs are priced and customer reviews.
Also near Victoria
More services for Victoria
Questions from Victoria
Do you work for landlords with property near London Victoria station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Can parking be tricky for a visit in Victoria?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Where are you based?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
What is backing rod for?
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.
Do you work at height?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
Can you seal over the old sealant?
No, it will not last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Should I point up the gap in my brickwork?
No. A mortar-filled joint cannot move, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Is it messy?
We keep the work tidy. Nearby surfaces are protected.