West Sussex · England
External & façade joints in Fontwell, West Sussex
Problem with your movement joints in Fontwell? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Failed sealant between panels on a façade
- Weathered mastic that no longer stretches
- Sealant pulling away from one side of the joint
External mastic for homes and businesses in Fontwell
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. If you’re dealing with panel joints letting water in and failed seals between different materials, we can put it right.
Older homes in small places like Fontwell may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
A 12-month guarantee comes as standard.
- Where
- Fontwell (BN18, PO20)
- Region
- West Sussex
- Cover
- A year, on every job
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
The process
At the end, we look at the finished work together and explain the cure time. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on the size of the job. For a village or hamlet like Fontwell, 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.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- 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.
How to prepare
- Mention any sign-in or site rules at work premises
- Mention any leaks or damp you’ve noticed
- Clear items away from the joints we’re working on
Getting a quote
For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
Read more
Different surfaces, different methods
Render joints
Water behind render can lead to blown patches. Resealing the joints early keeps water out.
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Landlord and commercial work in Fontwell
We also work for property managers and facilities teams in Fontwell and across West Sussex. We can quote a run of properties together, and we are fully insured.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
FAQs for Fontwell
Do you cover smaller places like Fontwell?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Barnham station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Should I try DIY first?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back so the bead can stretch.
Do you work at height?
That depends on the building and the joints. We work on joints that can be reached safely. Tell us about the building and we will confirm what access is needed.
Do you guarantee your work?
Yes. Every job comes with a one-year guarantee.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Honest limits
A few problems are outside what sealant work can do:
- Cracked brickwork or render that needs a builder or plasterer
- Damp that isn’t coming from the joint
- Failed render or damaged cladding panels
If you are not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Copings & trims
Do you need external mastic in Fontwell?
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
It’s worth asking for a quote if you see:
- Sealant pulling away from one side of the joint
- Moss and dirt in joints with no sealant left
- Panel joints letting water in
- Cracked joints where brick meets render or frames
Historic houses such as Goodwood House, about 4.2 miles west, show how far back building around Fontwell goes, and older homes nearby need a sealant that suits their walls.
Before you book anyone
- What the quote includes, VAT included or not
- How long the guarantee is
- How long to leave it before use
- What insurance they hold
Fontwell buildings and the weather
With historic houses such as Goodwood House (about 4.2 miles west) nearby, there’s older building stock in the area around Fontwell 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. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Barnham station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. Schools such as Ormiston Six Villages Academy are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Fontwell is about 5 miles north of Bognor Regis, in West Sussex. From the centre of Fontwell to the outskirts, external mastic is available for homes and businesses alike. Across West Sussex, we cover 371 places, and Fontwell is one of them. There’s also a page for Portsmouth, about 19 miles away.
Jobs for external mastic in BN18 and PO20 works the same way as everywhere else we cover. Streets in the area include London Road, Cooke Road and Steeplechase Way. Other places close to Fontwell include Eastergate (1 mile south), Slindon (1 mile north-east), Nyton (1 mile south-west), West Barnham (1 mile south) and Slindon Common (1 mile east). We also work in nearby towns such as Worthing (11 miles east), Bognor Regis (5 miles south), Chichester (6 miles west), Selsey (10 miles south-west), Littlehampton (6 miles south-east) and Lancing (14 miles east).
Landmarks near Fontwell
Locally, jobs take us to homes and businesses close to Eastergate CofE Primary School. Fontwell’s nearest station is Barnham station, about 1.6 miles south. Nearby you will also find Tote Copse Castle (2.2 miles south-west) and Arundel and District Hospital (3.7 miles east). Not far away are Bignor Hill and WWT Arundel.
Also near Fontwell
More services for Fontwell
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
What happens if it’s left?
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’s worth doing right. Around Fontwell, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why choose Mr Mastic in Fontwell
- White, clear, grey or another colour, product permitting
- We leave the area clean and tidy
- Sealant colour chosen to suit
- Fully insured
Take a look at our cost guide or what customers say.