West Sussex · England
External & façade joints in Barnham, West Sussex
Professional external mastic in and around Barnham, with old sealant always removed completely and a 12-month guarantee.
- Plants rooting in failed movement joints
- Joints with sealant missing in places
- Joints where the bead has come unstuck
External mastic in Barnham, done properly
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the joint does not stand out. Common call-outs are for joints with sealant missing in places and joints where the bead has come unstuck, on concrete & block, copings & trims and façade panels.
Around Barnham, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
Your job is guaranteed for a year, as with all our work.
- Place
- Barnham (PO22)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What we can’t put right
We won’t take on work that will not last, so these are the limits:
- Loose or hollow render, which needs re-rendering
- Cracking across the wall rather than at a joint
- Rising or penetrating damp from elsewhere in the wall
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before booking.
Where we work in Barnham
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Façade panels
- Brickwork movement joints
What the job involves on each surface
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it and keep the sealant to the right depth.
What affects the quote in Barnham
Every job gets its own quote. These are the things that affect it:
- The old material and how stubborn it is
- Working hours on commercial sites
- The size of the job
- The number of rooms or windows
Doing several joints on one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Whether it’s a home or a business
- The rough size of the job
- Where the job is, and your postcode
- If someone has resealed it before
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or email us.
How the visit works
You do not need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the job takes a few hours to a few days, depending on the length of joint and the access in most cases. For a village or hamlet like Barnham, 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.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
- Plan for the work area to be out of bounds to pets and children
Get a quote
For external mastic in Barnham, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
Related advice
External mastic in Barnham: local notes
Barnham is close to 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. Rainfall in the South East is lower than in much of the UK, 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 The Parish Church of St Mary, older walls, gutters and the joints where extensions meet them need a flexible sealant. Schools such as Barnham Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Barnham is about 4 miles north-east of Bognor Regis, in West Sussex. Whether you are in the middle of Barnham or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Our area takes in 371 places across West Sussex, large and small. You can also see our page for Portsmouth, about 19 miles away.
Our applicators cover all of the PO22 postcode area for external mastic. Streets in the area include Garden Crescent, Dollery Road and Goodacres, and we cover them all. Close by, we work in West Barnham (1 mile north-west), Walberton (1 mile north-east), Yapton (1 mile south-east), Eastergate (1 mile north-west) and Lidsey (1 mile south-west). Larger places within reach include Worthing (10 miles east), Bognor Regis (4 miles south-west), Chichester (6 miles west), Selsey (9 miles south-west), Littlehampton (5 miles east) and Lancing (14 miles east).
Landmarks near Barnham
Locally, jobs take us to homes and businesses close to The Murrell Arms and St Philip Howard Catholic High School. Barnham has its own railway station: Barnham station. Nearby you will also find Bognor Regis War Memorial Hospital (3.2 miles south-west) and Tote Copse Castle (2.5 miles west). The countryside around Barnham includes WWT Arundel.
FAQs for Barnham
I let a flat near Barnham station. Can you help?
Yes. We work for landlords and letting agents as well as householders, and several properties can go on one quote. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Does living near the coast affect external mastic in Barnham?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
How long does external mastic take?
Typically it takes anything from a few hours to several days, depending on the building. Larger jobs naturally take longer.
How long does external mastic last?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Our work comes with a one-year guarantee.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Will it make a mess?
No. The area is protected while we work and cleaned up afterwards.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint before we leave.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages to suit the site.
Common problems we fix in Barnham
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
Most people get in touch after spotting one of these:
- Joints pointed up with cement by mistake
- Sealant pulling away from one side of the joint
- Leaking joints around cladding and façade panels
- Rain getting behind render or cladding at a joint
For landlords with property near Barnham station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- Whether they’re fully insured
- Whether VAT is included
- What happens if they find a problem under the old sealant
- How long the guarantee is
Should I try it myself first?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Places near Barnham
What else we do in Barnham
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, so it pays to do it properly once. Around Barnham, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first and give you a clear quote before we start.
Why us?
- Every job guaranteed for a year
- Old sealant always removed completely
- Anti-fungal silicone where joints get wet
- Colour agreed with you before work begins
Take a look at how sealant jobs are priced and what customers say.