West Sussex · England
External Mastic in Bilsham
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Bilsham and across West Sussex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Old sealant gone brittle and cracked
- Panel joints letting water in
- Water getting into walls through failed joints
External mastic for homes and businesses in Bilsham
For buildings in Bilsham, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. We work on render & cladding joints, joints between brick and frames and brickwork movement joints, and people most often call us about water getting into walls through failed joints and failed sealant between panels on a façade.
Outside joints can only be sealed when they’re dry, so work in Bilsham is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
You get a one-year guarantee, the same in Bilsham as everywhere else we work.
- Location
- Bilsham (BN18)
- Region
- West Sussex
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Should I try it myself first?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
What sealant work cannot fix
We won’t take on work that will not last, so here’s what sealant cannot put right:
- Movement that is more than a sealant joint can take
- Adding movement joints to masonry that has none
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before booking.
Joints and surfaces we work on
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Façade panels
Outside joints around Bilsham
Bilsham is within about 2 miles 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. 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.
If you look after a building such as Yapton CE Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. For landlords with property near Barnham station, outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near Bilsham Chapel, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Bilsham is about 3 miles north-east of Bognor Regis, in West Sussex. Every kind of property in Bilsham can book us for external mastic. Every job comes with our one-year guarantee. Bilsham is one of 371 towns and villages in West Sussex we cover. For nearby work, see our Portsmouth page.
We cover every part of BN18 for external mastic and the streets around it. Other places close to Bilsham include Yapton (1 mile north), Flansham (1 mile west), Barnham (2 miles north-west), West Barnham (2 miles north-west) and Lidsey (2 miles west). We also work in nearby towns such as Worthing (10 miles east), Bognor Regis (3 miles south-west), Chichester (7 miles west), Selsey (9 miles south-west), Littlehampton (4 miles east) and Shoreham-by-Sea (15 miles east).
Landmarks near Bilsham
In Bilsham, that means homes and buildings near Felpham Community College, among other places. The closest station to Bilsham is Barnham station, about 1.8 miles north-west of the centre. Well-known places in the area include Bognor Regis Museum (3.3 miles south-west) and Bognor Regis War Memorial Hospital (2.8 miles south-west). Not far away are WWT Arundel.
What affects the cost of external mastic
You will get a clear quote before any work starts. It takes into account:
- Any working-time requirements on site
- The type of sealant required
- Whether there’s mould to deal with
- The number of rooms or windows
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email for an honest opinion and a quote.
What we need to know
To make quoting easier, let us know:
- The rough size of the job
- Where the property is
- If someone has resealed it before
- The problem you’ve noticed
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll explain what’s involved.
Your questions about external mastic in Bilsham
Can you help a landlord with a rental near Barnham station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Will you come out to Bilsham?
Yes, Bilsham is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Where do you work from?
Our base is in Crawley, and we work across South East England, London and Scotland.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
What’s an expansion joint in brickwork?
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.
Can you match the colour of my brickwork?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin.
Do you seal joints where cladding meets other materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Surface by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it or an approved alternative. Send us any details you have about the façade.
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
What we do, step by step
We keep the work tidy and contained to the area we are working on, so you can carry on as normal. Expect the work to take a few hours for a handful of joints, longer for a whole elevation, and we tell you how long to leave it before we go. For a village or hamlet like Bilsham, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- For business premises, tell us about site rules or sign-in
- Plan for the work area to be out of bounds to pets and children
- Tell us about any previous sealing or DIY attempts
Getting a quote
We do not publish a price list. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or drop us an email.
Advice
How to look after the new joints
To keep the joints looking good and working properly:
- Never let anyone fill a movement joint with mortar
- Keep water from gutters off the wall
- Point out the joints to other trades
- Get split or bare joints resealed while the damage is small
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal before water has had years to get in.