Greater London · England
External Mastic in Notting Dale
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Notting Dale and across Greater London. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
- Failed sealant between panels on a façade
External mastic in Notting Dale
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 concrete & block, brickwork movement joints and joints between brick and frames, and common reasons people get in touch are rigid filler in a joint that should flex and joints with sealant missing in places.
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 Dale, check the lease for who looks after the outside.
Every job comes with our 12-month guarantee, wherever you are in Greater London.
- Location
- Notting Dale (W11, W10, W2)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Your questions about external mastic in Notting Dale
Is parking an issue for external mastic in Notting Dale?
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.
I let a flat near Shepherds Bush station. Can you help?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area.
What does external mastic cost?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or send us an email and tell us what needs doing and where.
Do you cover Notting Dale?
Yes. We are based in Crawley and work across South East England, London and Scotland.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. The sealant is matched to both sides.
How long will you be here?
That depends on the amount of work, 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.
Notting Dale buildings and the weather
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Sambourne House (about 1.1 miles south-east) are a reminder that the area around Notting Dale has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Notting Dale is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Schools such as Thomas Jones Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Notting Dale is about 1 mile north of Kensington, in Greater London. We provide external mastic to householders, landlords and businesses in Notting Dale and the surrounding area. Notting Dale is one of 764 places in Greater London where we work for external mastic.
Here we cover the W11, W10 and W2 postcode area for external mastic. Whether your property is on Bard Road, Walmer Road and Sirdar Road or a nearby road, our applicators can take on the job. Other places close to Notting Dale include Notting Hill (1 mile south-east), White City (1 mile west), Kensal Town (1 mile north), North Kensington (1 mile north-west) and Holland Park (1 mile south). Within a short drive, 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 (6 miles east).
Landmarks near Notting Dale
In Notting Dale, that means homes and buildings near Kensington Aldridge Academy, Abdus Salam Library and The Elgin pub and the streets around them. Also close by are Maida Vale School (1.1 miles north-east) and Emslie Horniman's Pleasance (0.7 miles north). The closest station to Notting Dale is Shepherds Bush station, about 0.7 miles south-west. Nearby you’ll also find Greek Orthodox Cathedral Treasury Museum (0.8 miles east) and Westfield London (0.7 miles south-west). Green spaces nearby include Greville Place nature reserve and Campden Hill.
How to look after the new joints
So the new joints stay in good condition:
- Keep water from gutters off the wall
- Tell anyone working on the walls about the movement joints
- Check the sealant is paintable before painting near it
- Walk round the building once a year and look at the joints
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
The process
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and tidy away. It usually takes a few hours to a few days, depending on the length of joint and the access. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Getting ready for the visit
- Let us know about parking restrictions
- Mention if the joints have been sealed before
- For indoor joints, keep the area dry beforehand if you can
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Related advice
Towns and villages near Notting Dale
Other services in Notting Dale
When to call us in Notting Dale
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.
Signs it’s time to call us include:
- Weeds or debris growing in open joints
- Hard, crazed mastic that has stopped moving
- Failed seals between different materials
- Joints where the bead has come unstuck
If you live in an older home near Church of St Sava, an extension built onto an older house moves differently, and the joint between them takes the strain.
What your quote should include
- Who turns up on the day
- Whether they seal over old material or remove it
- What the cure time is
- Whether the sealant suits the joint
What affects the quote in Notting Dale
Your quote is based on your job. We look at:
- The amount of work
- When we can work, for business premises
- Access and height
- How much old sealant there is and how hard it is to remove
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We’ll give you a clear quote for the lot.
What we need to know
What to tell us when you ask for a quote:
- Where the job is, and your postcode
- A few photos by email, if you can
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Landlord and commercial work in Notting Dale
We also work for property managers and facilities teams in Notting Dale and across Greater London. We can quote a run of properties together.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Render that’s blown, hollow or coming away
- Cracked brickwork or render that needs a builder or plasterer
- Walls that need new movement joints cut into them
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Joints between brick and frames
- Copings & trims
- Façade panels
- Brickwork movement joints
- Concrete & block
- Render & cladding joints