Greater London · England
External & façade joints in Acton, Greater London
Movement joints in Acton need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Rain getting behind render or cladding at a joint
- Joints pointed up with cement by mistake
- Joints where the bead has come unstuck
External mastic in Acton, done properly
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement where mortar or filler would crack. We work on joints between brick and frames, copings & trims and façade panels, and the jobs we see most are gaps where render, brick and frames meet and weeds or debris growing in open joints.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in Acton, tell us how high the joints are and how to reach the back of the building.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Acton (W3, W4, NW10, W12)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
What sealant work cannot fix
It helps to know what we can’t do:
- Adding movement joints to masonry that has none
- Damp that is not coming from the joint
- Failed render or damaged cladding panels
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- Copings & trims
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
FAQs for Acton
Do you work for landlords with property near Acton Central station?
Yes. We work for landlords and letting agents as well as householders, and several properties can go on one quote. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Is parking a problem for a job in Acton?
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.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Do you guarantee your work?
Yes. Every job comes with our 12-month guarantee.
Do you come to Acton?
Yes. We cover Acton. For a quote, phone 0345 464 0079 or send us an email.
Where are you based?
We work from Crawley. Our applicators cover Acton.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Why is there a gap in my brick wall?
Brickwork, render and cladding all move a little, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
How the job changes by surface
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant.
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Point out the joints to other trades
- Ask before painting over external sealant
- Walk round the building once a year and look at the joints
- Have failed joints looked at early
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years.
Outside joints around Acton
In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Acton is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Rented homes near Acton Central station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. Historic houses such as Gunnersbury Park, about 1.4 miles south-west, show how far back building around Acton goes, and older homes nearby need a sealant that suits their walls.
Acton is about 3 miles west of Kensington, in Greater London. Our applicators cover external mastic for homes and businesses in Acton and nearby. Acton is one of 764 places in Greater London where we work for external mastic. You can also see our page for London, roughly 7 miles from Acton.
All of W3, W4, NW10 and W12 is within our area for external mastic. Streets in the area include High Street, Church Road and Woodhurst Road, and we cover them all. Main roads around Acton include the B490 and A4000, which makes travel easy. We also cover the places around Acton: Acton Vale (1 mile east), Acton Green (1 mile south), Bedford Park (1 mile south), Hanger Hill (1 mile north-west) and South Acton (1 mile south-west). Further out, we also cover London (7 miles east), City of Westminster (5 miles east), Marylebone (5 miles east), Kensington (3 miles east), St Pancras (6 miles east) and Shoreditch (8 miles east).
Around Acton
Typical jobs here are in homes near Leap Service - the National Autistics Society, Library for Iranian Studies and Ark Soane Academy and the streets around them. You will also find The Windmill pub (under half a mile south) and Ealing Common (1.2 miles west). Acton has its own railway station: Acton Central station. Well-known places in the area include Queen Charlotte's and Chelsea Hospital (1.3 miles east) and London Transport Museum Depot (0.8 miles south-west). The countryside around Acton includes Castlebar Hill and Hanger Hill Wood.
What else we do in Acton
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- Whether the work is at height
- Mould in or behind the old joints
- Any working-time requirements on site
- The product the joint needs
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
When you contact us, it’s useful to know:
- What’s wrong with the joints now
- Photos by email, if that’s easy
- Whether it has been sealed before
- How we’d reach the joints
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or email us.
Leave it or put it right?
Sealing over the top of old mastic does not hold for long. New sealant does not bond well to old, weathered sealant, so the old joint is cut out fully first. In a flat in Acton, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or send us an email and we will talk you through it.
Why book with us
- We leave the area clean and tidy
- 4.9 on Google from 180+ five-star reviews
- Old sealant always removed completely
- Arbo and Everbuild products
Read what affects the cost and customer reviews.
How it works
At the end, we look at the finished work together and explain the cure time. The work normally takes anything from a few hours to several days, depending on the building, depending on the size of the job. For a job in Acton, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- 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.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
Getting a quote
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or drop us an email with the details.