Greater London · England
External & façade joints in North End, Greater London
We cover North End 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.
- Failed sealant between panels on a façade
- Brick movement joints where the sealant has split
- Weathered mastic that no longer stretches
What happens on the day
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. In North End, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Mention any tricky access
- Tell us if parking is tricky
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you’re ready, ring 0345 464 0079 or drop us an email.
Read more
External mastic in North End, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. We’re often asked to deal with failed seals between different materials and weeds or debris growing in open joints, across façade panels, joints between brick and frames and copings & trims.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so one failed joint can cause damp for more than one household. For a flat in North End, check the lease for who looks after the outside.
You get a 12-month guarantee, the same in North End as everywhere else we work.
- Location
- North End (W14, SW6, SW5)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
To be straight with you, there are a few things sealant won’t fix:
- Adding movement joints to masonry that has none
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Structural movement, which needs a surveyor or engineer
If you are not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
Surfaces we seal
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Copings & trims
- Concrete & block
- Joints between brick and frames
Towns and villages near North End
Other services in North End
FAQs for North End
I let a flat near Kensington Olympia station. Can you help?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Is North End in your area for external mastic?
Yes, North End is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Can you seal joints between two different materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
How do I get a quote for external mastic in North End?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or email us and let us know what needs doing and where.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
When is the sealant fully cured?
Cure times vary by product and the conditions. We tell you how long to leave it before we go.
Are you insured?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Outside joints around North End
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. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
Schools such as The Fulham Boys School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. In the older streets around St. Andrew's Fulham Fields, the joints between older walls, newer extensions and the roofline need a sealant that can move.
North End is about 1 mile south of Kensington, in Greater London. If you need external mastic in North End, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Greater London from our Crawley base. Across Greater London, we cover 764 places, and North End is one of them.
Postcode districts we cover here for external mastic: W14, SW6 and SW5. That includes homes and businesses on Sun Road, Star Road and Field Road. Other places close to North End include West Kensington (1 mile east), Brook Green (1 mile north-west), Fulham (1 mile south), Hammersmith (1 mile west) and Brackenbury Village (1 mile north-west). Further out, we also cover London (5 miles east), City of Westminster (3 miles north-east), Marylebone (3 miles north-east), St Pancras (5 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (10 miles north-east).
Around North End
Around North End, our work takes us to homes and buildings near Seven Stars pub, Polish Library POSK in London and Avonmore Primary School. The closest station to North End is Kensington Olympia station, roughly 0.5 miles north. Well-known places in the area include Hammersmith Broadway (0.7 miles west) and Montfichet's Tower (4.8 miles east). Green spaces nearby include WWT London Wetland Centre and Campden Hill.
Landlord and commercial work in North End
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
For anyone letting property in or around North End, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
How to look after the new joints
After the cure time, these simple habits help:
- Ask before painting over external sealant
- Never let anyone fill a movement joint with mortar
- Tell anyone working on the walls about the movement joints
- Deal with leaking gutters that soak the joints below
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.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
When to call us in North End
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
Most people get in touch when they notice one of these:
- Joints where the bead has come unstuck
- Plants rooting in failed movement joints
- Damp patches traced to an open external joint
- Failed seals between different materials
Rented homes near Kensington Olympia station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Before you book anyone
- What preparation is included
- What happens if they find a problem under the old sealant
- The length of the guarantee
- Whether VAT is included
What affects the quote in North End
We quote each job individually. These are the things that affect it:
- Any mould that needs treating
- How many rooms, windows or areas are involved
- The type of sealant required
- Whether the work is at height
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or email us.
Helping us quote
To make quoting easier, let us know:
- Whether it’s a home or a business
- What’s wrong with the joints now
- Access, such as stairs, a lift or height
- A few photos by email, if you can
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or email us.