Greater London · England
External & façade joints in Westbourne Green, Greater London
External mastic across Westbourne Green and nearby, with old sealant always removed completely and a 12-month guarantee.
- Moss and dirt in joints with no sealant left
- Water getting into walls through failed joints
- Cracked joints where brick meets render or frames
How we handle external mastic in Westbourne Green
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. If you are dealing with weathered mastic that no longer stretches and panel joints letting water in, we can put it right.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in Westbourne Green, tell us how high the joints are and how to reach the back of the building.
All of our work is guaranteed for twelve months, in Westbourne Green and everywhere else we cover.
- Place
- Westbourne Green (W2, W9, W11)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
How the visit works
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 a few hours to a few days, depending on the length of joint and the access. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Westbourne Green. It helps if you can point us to a visitor permit or a bay close to the door.
- 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
- Keep children and pets away from the work area
- Mention any tricky access
- Let us know about parking restrictions
Getting a quote
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
What external mastic looks like in Westbourne Green
Historic houses like Kensington Palace (about 1 mile south) are a reminder that the area around Westbourne Green has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
As a London address, Westbourne Green can be tricky for parking: let us know about parking bays, permits or a driveway. If you live in an older home near St Mary Magdalene, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Westbourne Green is about 2 miles north-east of Kensington, in Greater London. Whether you are in the middle of Westbourne Green or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 764 places in Greater London are on our list, from the larger towns to small villages.
Here we cover the W2, W9 and W11 postcode area for external mastic. Streets in the area include Salem Road, Talbot Road and Harrow Road. Westbourne Green sits on or near the A404 and A4206, which makes travel easy. If you’re just outside Westbourne Green, we cover Little Venice (1 mile east), Westbourne (1 mile south-west), Maida Vale (1 mile north), Paddington Green (1 mile east) and Paddington (1 mile east). Further out, we also cover London (4 miles east), St Pancras (3 miles east), Shoreditch (5 miles east), Walthamstow (8 miles north-east), Hoxton (5 miles east) and Whitechapel (5 miles east).
Near you in Westbourne Green
Typical jobs here are in homes near Maida Vale School, Emslie Horniman's Pleasance and Abdus Salam Library, among other places. You’ll also find The Bridge House (less than half a mile east) and Westminster Academy (less than half a mile west). The closest station to Westbourne Green is London Paddington station, about 0.5 miles south-east. Other landmarks nearby include Greek Orthodox Cathedral Treasury Museum (0.6 miles south) and Paddington General Hospital (within half a mile north-west). The countryside around Westbourne Green includes The Long Water and Greville Place nature reserve.
Your questions about external mastic in Westbourne Green
I let a flat near London Paddington station. Can you help?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Is parking a problem for a job in Westbourne Green?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Are you insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
How do I get a quote for external mastic in Westbourne Green?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before we start.
When will the joints need doing again?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area.
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 will confirm what’s needed.
Why is there a gap in my brick wall?
A vertical gap in a long brick wall is generally a movement joint. It lets the bricks expand without cracking.
Towns and villages near Westbourne Green
Also in Westbourne Green
What the job involves on each surface
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant.
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best in all weathers.
Common problems we fix in Westbourne Green
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
The most common problems we see are:
- Joints where the bead has come unstuck
- Movement joints filled with mortar instead of sealant
- Damp patches traced to an open external joint
- Cracked joints where brick meets render or frames
Managing a site like Edward Wilson Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- Whether all the old sealant comes out first
- How long to leave it before use
- What the quote includes, VAT included or not
- How long the guarantee is
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Keep movement joints as flexible joints, not mortar
- Don’t let climbing plants root in the sealant
- Tell anyone working on the walls about the movement joints
- Walk round the building once a year and look at the joints
Don’t paint over the new sealant unless we have said the product is paintable. Paint can crack on a flexible joint and spoil the finish.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
Landlords, agents and businesses in Westbourne Green
Landlords and letting agents in Westbourne Green can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
Why deal with it now?
Running new sealant over the old bead rarely lasts. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. 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.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll explain what it covers.
Why book with us
- A choice of colours where the product allows
- You choose the colour before work begins
- We never seal over old sealant
- Over 20 years’ experience
Take a look at how sealant jobs are priced and our reviews.