Greater London · England
External & façade joints in Notting Hill, Greater London
Movement joints in Notting Hill need attention? We cut out the old, prepare the joints and apply the right sealant.
- Brick movement joints where the sealant has split
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
External mastic in Notting Hill
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement. If you’re dealing with plants rooting in failed movement joints and weathered mastic that no longer stretches, we can help, on render & cladding joints, concrete & block and brickwork movement joints alike.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so a leaking gutter joint or failed wall joint can affect more than one home. For a flat in Notting Hill, check the lease for who looks after the outside.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Notting Hill (W11, W8, W2)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we cannot put right
We will always be straight with you, so here’s what new sealant will not do:
- Failed render or damaged cladding panels
- Cracking across the wall rather than at a joint
- Walls that need new movement joints cut into them
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Surfaces we seal
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Render & cladding joints
- Façade panels
How the job changes by surface
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap.
What affects the quote in Notting Hill
You will get a clear quote before work begins. It takes into account:
- The number of rooms or windows
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
- The size of the job
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first.
Helping us quote
When you contact us, these details help:
- How many joints, rooms or windows are involved
- The problem you’ve noticed
- Whether it has been sealed before
- Photos by email, if that is easy
For external mastic in Notting Hill, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Looking after it afterwards
To keep the joints looking good and working properly:
- Point out the joints to other trades
- Do not let climbing plants root in the sealant
- Leave the joints unpainted unless we have said otherwise
- Keep water from gutters off the wall
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.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
Why act early in Notting Hill
Water gets in through a failed movement joint and can run behind render or cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Notting Hill, the repair is bigger than a sealant job.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why Notting Hill clients choose us
- Sealant colour chosen to suit
- Homes, businesses and hotels
- Quality sealants from Arbo and Everbuild
- A 12-month guarantee on all work
Take a look at what affects the cost and customer reviews.
Nearby places to Notting Hill
What else we do in Notting Hill
Common questions in Notting Hill
Is parking an issue for external mastic in Notting Hill?
Parking in Notting Hill, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Can you help a landlord with a rental near Shepherds Bush station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
How long does external mastic take?
It depends on the size of the job, but as a guide it takes a few hours to a few days, depending on the length of joint and the access. We’ll tell you when we quote.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in.
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.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Notting Hill and the rest of Greater London, along with the rest of our area.
Do you have insurance?
Yes. Full insurance covers our work.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
External mastic in Notting Hill: local notes
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
Homes close to St John's Notting Hill include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move. For landlords with property near Shepherds Bush station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Notting Hill is about 1 mile north of Kensington, in Greater London. Anywhere in W11, we can carry out external mastic at your property. Across Greater London, we cover 764 places, and Notting Hill is one of them.
Here we cover the W11, W8 and W2 postcode area for external mastic. We cover properties on Walmer Road, Aubrey Road and Sirdar Road. You’ll find Notting Hill on the A402 and A4204, which makes it straightforward to reach with everything needed for external mastic. If you’re just outside Notting Hill, we cover Holland Park (1 mile south), Notting Dale (1 mile north-west), Kensington (1 mile south), Shepherd's Bush (1 mile south-west) and White City (1 mile west). Further out, we also cover London (5 miles east), Marylebone (3 miles east), St Pancras (4 miles east), Shoreditch (6 miles east), Walthamstow (9 miles north-east) and Hoxton (5 miles east).
Near you in Notting Hill
Around Notting Hill, our work takes us to homes and buildings near The Sun In Splendour pub, Kensington School and Abdus Salam Library and the streets around them. You will also find Holland Park (within half a mile south) and Holland Park School (under half a mile south). For rail, the closest station is Shepherds Bush station, about 0.6 miles south-west. Other landmarks nearby include Montfichet's Tower (4.4 miles east) and Westfield London (0.7 miles west). For a walk, there’s Campden Hill and The Long Water.
What we do, step by step
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the building. In Notting Hill, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Clear items away from the joints we’re working on
- Let us know about parking restrictions
- On commercial sites, let us know about site rules
How to get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or send us an email.
Advice
Signs you need external mastic in Notting Hill
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
Common reasons people contact us are:
- Weeds or debris growing in open joints
- Hard, crazed mastic that has stopped moving
- Joints where the bead has come unstuck
- Cracked joints where brick meets render or frames
If you look after a building such as St Clement and St James CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- Whether VAT is included
- How the surfaces are prepared before sealing
- How hidden problems are handled
- When the joint can take water or movement