Greater London · England
External & façade joints in Turnham Green, Greater London
Problem with your movement joints in Turnham Green? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Water getting into walls through failed joints
- Old sealant gone brittle and cracked
- Brick movement joints where the sealant has split
External mastic for homes and businesses in Turnham Green
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render. If you are dealing with joints where the bead has come unstuck and damp patches traced to an open external joint, we can help, whatever the surface.
Modern London flats rely on sealed movement joints and cladding joints. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall, and both kinds of building are found across London.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Location
- Turnham Green (W4, SW13, W6)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Signs you need external mastic in Turnham Green
Every building moves. 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.
It’s worth asking for a quote if you see:
- Failed seals between different materials
- Brick movement joints where the sealant has split
- Sealant pulling away from one side of the joint
- Weathered mastic that no longer stretches
Turnham Green is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Before you book anyone
- What happens if the job turns out different
- How much experience the applicator has
- How long to leave it before use
- The length of the guarantee
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Show decorators and builders where the movement joints are
- Never let anyone fill a movement joint with mortar
- Ask before painting over external sealant
- Fix overflowing gutters above sealed joints
Keep pressure washers away from the sealant. High-pressure water can lift the edges over time.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
What affects the cost of external mastic
For a quick quote, just ask. What matters most is:
- Whether there’s mould to deal with
- The number of rooms or windows
- When we can work, for business premises
- How easy the joints are to reach
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first and send you a clear quote before work begins.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
- The address or postcode of the job
- The type of property
Want a quote for external mastic? Please call 0345 464 0079 or email us with a few details. We will explain what we’d do and give you a clear price before work begins.
Surface by surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Nearby places to Turnham Green
Also in Turnham Green
How it works
There is not much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. 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.
Preparing for the visit
- Clear the area around the work
- Tell us about any water getting in
- Keep pets and children clear of the area while we work
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work and give you a clear price.
Related advice
What we cannot put right
We will not take on work that won’t last, so here’s what sealant cannot put right:
- Loose or hollow render, which needs re-rendering
- Damp that isn’t coming from the joint
- Cracking across the wall rather than at a joint
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
Where we work in Turnham Green
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Concrete & block
- Façade panels
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
For anyone letting property in or around Turnham Green, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
Turnham Green buildings and the weather
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
Rented homes near Chiswick station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you live in an older home near St. Nicholas Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Turnham Green is about 2 miles south of Acton, in Greater London. Every kind of property in Turnham Green is covered for external mastic. Every job comes with our 12-month guarantee. Turnham Green is one of 764 towns and villages in Greater London we cover for external mastic. Our London page covers work nearby (7 miles or so).
Postcode districts we cover here for external mastic: W4, SW13 and W6. Local streets include Duke Road, Short Road and Binns Road, all of which we cover. We also cover the places around Turnham Green: Old Chiswick (1 mile east), Chiswick (1 mile north), Grove Park (1 mile south-west), Barnes (1 mile south-east) and Kew (1 mile west). Larger places within reach include London (7 miles east), City of Westminster (5 miles north-east), Marylebone (5 miles north-east), St Pancras (6 miles north-east), Shoreditch (8 miles east) and Walthamstow (12 miles north-east).
Landmarks near Turnham Green
In Turnham Green, that means homes and buildings near Polish Library POSK in London, George and Devonshire pub and The Swedish School. Nearby too are Chiswick School (within half a mile south-west) and Dukes Meadows (0.8 miles south-west). The nearest railway station is Chiswick station, about 0.7 miles south-west. A little further out are Kurdish Museum Library and Archive (0.9 miles north-east) and Barnes Hospital (1.3 miles south). For a walk, there’s Campden Hill and Duke's Hollow.
Turnham Green questions
Do you cover Turnham Green for external mastic?
Yes, Turnham Green is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing.
Is parking a problem for a job in Turnham Green?
Parking in Turnham Green, 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.
Do you guarantee your work?
Yes. Each job is guaranteed for twelve months, large or small.
What’s an expansion joint in brickwork?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move, and it should be sealed with a flexible sealant.
Do you work for landlords and businesses?
Yes. We work for homeowners, landlords, letting agents, businesses and hotels across Greater London.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
How long does the job take?
Typically it takes a few hours to a few days, depending on the length of joint and the access. Bigger jobs take longer.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.