Surrey · England
External & façade joints in Charlton, Surrey
External mastic for Charlton, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Brick movement joints where the sealant has split
- Water getting into walls through failed joints
- Joints pointed up with cement by mistake
How we handle external mastic in Charlton
On houses, flats and commercial buildings across Charlton, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. If you are dealing with old sealant gone brittle and cracked and moss and dirt in joints with no sealant left, we can put it right, on façade panels, joints between brick and frames and concrete & block alike.
Older homes in small places like Charlton may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in, and they need the right sealant at the right depth.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Location
- Charlton (TW17)
- Wider area
- Surrey
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What sealant work cannot fix
It helps to know what we cannot do too:
- Loose or hollow render, which needs re-rendering
- Structural movement, which needs a surveyor or engineer
- Damp that isn’t coming from the joint
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Where we work in Charlton
- Copings & trims
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Concrete & block
- Joints between brick and frames
What the job involves on each surface
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best.
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind.
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
How we quote for external mastic
There’s no set price list. The quote depends on:
- The number of rooms or windows
- The type of sealant required
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we’ll go through it with you.
Helping us quote
You do not need to know the technical terms. Just tell us:
- If it’s domestic, commercial or a hotel
- The problem you’ve noticed
- Whether it has been sealed before
- Roughly how big the job is
Need a quote? Please call 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
How it works
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before any work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. Somewhere like Charlton needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Move anything stored near the joints
- Mention any tricky access
- Let us know about earlier repairs to the joints
Get a quote
Every job is quoted individually. Simply ring 0345 464 0079 or send us an email and describe the job, and photos are welcome.
Read more
What external mastic looks like in Charlton
With historic houses such as Hampton Court Palace (about 4.6 miles east) nearby, there’s older building stock in the area around Charlton as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Schools such as Littleton CofE Infant School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. Homes close to Church of St Mary Magdalene include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Charlton is about 1 mile west of Sunbury-on-Thames, in Surrey. Across the TW17 area, we can carry out external mastic at your property. We cover 395 towns and villages across Surrey, large and small. There’s also a page for London, about 16 miles away.
Postcode districts we cover here for external mastic: TW17. External mastic is available to properties on Lodge Way, Charlton Road and Hetherington Road and the roads around them. Nearby, we also carry out external mastic in Littleton Common (1 mile north), Upper Halliford (1 mile south-east), Ashford Common (1 mile north), Shepperton Green (1 mile south-west) and Littleton (1 mile west). Within a short drive, we also cover Guildford (13 miles south-west), Woking (9 miles south-west), Camberley (13 miles south-west), Epsom (9 miles south-east), Ewell (9 miles south-east) and Egham (5 miles west).
Landmarks near Charlton
We work in homes and buildings around Sunbury Manor School, The Bishop Wand Church of England School and Sunbury Park and the streets around them. The closest station to Charlton is Upper Halliford station, roughly 0.6 miles east of the centre. Nearby you will also find Kempton Steam Museum (2 miles north-east) and No. 2 New Zealand General Hospital (1.9 miles south-east). Not far away are St Ann's Hill and Ferris Meadow Lake.
When to call us in Charlton
Buildings move more than people expect. 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.
Signs it’s time to call us include:
- Failed seals between different materials
- Sealant pulling away from one side of the joint
- Movement joints filled with mortar instead of sealant
- Damp patches traced to an open external joint
Rented homes near Upper Halliford station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Comparing quotes
- Whether they seal over old material or remove it
- How the joint is cleaned and prepared
- When the joint can take water or movement
- What happens if they find a problem under the old sealant
Nearby places to Charlton
More services for Charlton
Leave it or put it right?
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. Where a wall is exposed, as many are in small places like Charlton, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and agree the price before starting.
What you get with us
- 180+ five-star Google reviews
- Approved under the ARBOMaster scheme
- Trusted Arbo and Everbuild sealants
- Colour picked to suit the job
Take a look at our cost guide and our reviews.
Common questions in Charlton
Will you come out to Charlton?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is Charlton in your area for external mastic?
Yes. Our work covers London and the South East, and Charlton is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint before we leave.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
What information do you need?
Tell us what needs doing and where, plus pictures if you have them. We will ask anything else we need to know.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher ones, send details and we will confirm the access.