West Sussex · England
External & façade joints in Atherington, West Sussex
Movement joints in Atherington need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Plants rooting in failed movement joints
- Joints where the bead has come unstuck
- Rigid filler in a joint that should flex
How we handle external mastic in Atherington
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two where mortar or filler would crack. If you are dealing with rigid filler in a joint that should flex and hard, crazed mastic that has stopped moving, we can help, whatever the surface.
Outside joints can only be sealed when they’re dry, so work in Atherington is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
Our work is backed for twelve months, in Atherington and everywhere else we cover.
- Where
- Atherington (BN17)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
We work for landlords and letting agents as well as homeowners. Resealing between tenancies keeps a property looking cared for.
What external mastic looks like in Atherington
Atherington is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as Bailiffscourt Chapel, older walls, gutters and the joints where extensions meet them need a flexible sealant. Letting a property close to Littlehampton station? Then split movement joints are easy to miss on a rental until damp shows inside.
Atherington is about 2 miles west of Littlehampton, in West Sussex. From the centre of Atherington to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Atherington is one of 371 places in West Sussex where we work. You can also see our page for Brighton, about 20 miles away.
Postcode districts we cover here for external mastic: BN17. Close by, we work in Climping (1 mile north), Horsemere Green (1 mile north-west), Ford (2 miles north), Wick (2 miles north-east) and Littlehampton (2 miles east). Further out, we also cover Worthing (8 miles east), Bognor Regis (5 miles west), Chichester (9 miles west), Selsey (10 miles south-west), Shoreham-by-Sea (14 miles east) and Lancing (11 miles east).
Landmarks near Atherington
Typical jobs here are in homes near The Littlehampton Academy and The Black Horse Public House, among other places. The closest station to Atherington is Littlehampton station, roughly 1.5 miles east of the centre. A little further out are Lyminster Siege Castle (3.8 miles north-east) and Rustington Museum (3.3 miles east). Green spaces nearby include WWT Arundel.
How the job changes by surface
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap so the sealant is not too deep.
Cladding and façade panels
If the façade has a specified sealant, that’s what we use or an approved alternative. Tell us what the building has when you get in touch.
When something else is needed
We won’t take on work that won’t last, so these are the limits:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Loose or hollow render, which needs re-rendering
- Cracks in the bricks or render themselves, away from the joints
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Where we work in Atherington
- Joints between brick and frames
- Copings & trims
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
What happens on the day
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes a few hours for a handful of joints, longer for a whole elevation from start to finish. For a village or hamlet like Atherington, the journey is planned in advance: 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.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Clear items away from the joints we are working on
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Get a quote
For external mastic in Atherington, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Advice
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Common questions in Atherington
Does living near the coast affect external mastic in Atherington?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
I let a flat near Littlehampton station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Will there be a smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render. Exterior sealants come in a good range of colours.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages.
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.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
What is a movement joint?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Signs you need external mastic in Atherington
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
The most common problems we see are:
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
- Water getting into walls through failed joints
- Weathered mastic that no longer stretches
For site and facilities teams at buildings such as St Mary's CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- How the joint is cleaned and prepared
- Whether they’re fully insured
- Whether the sealant suits the joint
- The length of the guarantee
Places near Atherington
Other services in Atherington
Keeping the joints in good condition
Aftercare is simple:
- Keep soil, plants and ivy away from the joints
- Have failed joints looked at early
- Deal with leaking gutters that soak the joints below
- Check external joints each spring
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.