Greater London · England
Maida Vale External Mastic
External mastic across Maida Vale and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Joints where the bead has come unstuck
- Panel joints letting water in
- Weeds or debris growing in open joints
External mastic in Maida Vale, done properly
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. If you have sealant pulling away from one side of the joint and moss and dirt in joints with no sealant left, we can help, on copings & trims, concrete & block and render & cladding joints alike.
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. In a converted house in Maida Vale, it’s worth checking who is responsible for the outside before booking.
Big or small, you get the same one-year guarantee.
- Location
- Maida Vale (W9, NW8, NW6)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Walls and rooflines in Maida Vale
In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Kilburn High Road station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around St Peter Elgin Avenue, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Maida Vale is about 2 miles south of Hampstead, in Greater London. Anywhere in W9, we can carry out external mastic at your property. Our Greater London coverage runs to 764 places, and Maida Vale is one of them.
Jobs for external mastic in W9, NW8 and NW6 is quoted and booked the same way as anywhere else. Local streets include The Lane, Hall Road and Hill Road, and we cover them all. Being close to the A404, Maida Vale is simple for us to get to for external mastic. Close by, we work in Westbourne Green (1 mile south), Little Venice (1 mile south-east), Paddington Green (1 mile south-east), Westbourne (1 mile south) and St John's Wood (1 mile north-east). We also work in nearby towns such as London (5 miles south-east), St Pancras (3 miles east), Shoreditch (5 miles east), Walthamstow (8 miles north-east), Hoxton (5 miles east) and Whitechapel (5 miles east).
Landmarks near Maida Vale
Locally, jobs take us to homes and businesses close to Emslie Horniman's Pleasance, Paddington Academy and The Warrington pub and the streets around them. You’ll also find Cecil Sharp House (1.9 miles north-east) and Maida Vale School (within half a mile west). The closest station to Maida Vale is Kilburn High Road station, about 0.7 miles north of the centre. A little further out are Montfichet's Tower (3.9 miles east) and O2 Centre (1.5 miles north). Open spaces near Maida Vale include Greville Place nature reserve and The Long Water.
Landlords, agents and businesses in Maida Vale
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
What affects the quote in Maida Vale
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The product the joint needs
- How much old sealant there is and how hard it is to remove
- The size of the job
- Access and height
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What we need to know
When you call or email, these details help:
- How we’d reach the joints
- Whether it’s a home or a business
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
Need a quote? Please phone 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Common questions in Maida Vale
Is parking a problem for a job in Maida Vale?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Do you work for landlords with property near Kilburn High Road station?
Yes. We work for landlords and letting agents as well as householders. You can phone 0345 464 0079 or email us with the details for a clear quote.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Will the new joint stand out?
The sealant colour is picked to suit the wall. There’s a wide choice of exterior colours.
Do you guarantee your work?
Yes. Every job comes with our 12-month guarantee.
How often do external joints need resealing?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Do you work at height?
It depends on the building. We work on joints that can be reached safely. Give us some details and we’ll confirm the access.
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Show decorators and builders where the movement joints are
- Check the sealant is paintable before painting near it
- Deal with leaking gutters that soak the joints below
- Act on the first splits you see
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
What we do, step by step
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. The job generally takes anything from a few hours to several days, depending on the building, and we tell you how long to leave it before we go. In Maida Vale, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Mention any tricky access
- Mention if the joints have been sealed before
- On commercial sites, let us know about site rules
How to get a quote
If you’re in Maida Vale and need external mastic, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
Related advice
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
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.
Surface by surface
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant if the joint can be cleared.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so neither cracks the other.
Common problems we fix in Maida Vale
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Most people get in touch after spotting something like this:
- Failed seals between different materials
- Movement joints with cracked, split or missing sealant
- Hard, crazed mastic that has stopped moving
- Plants rooting in failed movement joints
Maida Vale is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What to look for in a quote
- How the colour is chosen
- What insurance they hold
- How hidden problems are handled
- Whether they seal over old material or remove it