West Sussex · England
External & façade joints in Castle Town, West Sussex
Sealing brickwork movement joints, render, cladding and façade joints for Castle Town, backed by a 12-month guarantee. Call for a quick quote.
- Joints pointed up with cement by mistake
- Movement joints with cracked, split or missing sealant
- Gaps where render, brick and frames meet
External mastic in Castle Town, done properly
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall so the joint does not stand out. We work on façade panels, render & cladding joints and copings & trims, and common reasons people get in touch are movement joints with cracked, split or missing sealant and damp patches traced to an open external joint.
Somewhere as small as Castle Town, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
You are covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or email us.
- Where
- Castle Town (BN44)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Castle Town buildings and the weather
With historic houses such as Portslade Manor (about 4.2 miles south-east) nearby, there’s older building stock in the area around Castle Town as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. 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 live in an older home near St Botolph's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant. If you look after a building such as Upper Beeding Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you let a flat or house near Shoreham-By-Sea station, outside joints that have cracked can let damp into a rental, so check them between lets.
Castle Town is about 3 miles north of Shoreham-by-Sea, in West Sussex. Our applicators cover external mastic for homes and businesses in Castle Town and nearby. Across West Sussex, we cover 371 places, and Castle Town is one of them. There’s also a page for Brighton, about 8 miles away.
Every address in BN44 is within our area for external mastic. External mastic is available to properties on Henfield Road, The Bostal and Shoreham Road and the roads around them. We also cover the places around Castle Town: Adur (2 miles south), Old Shoreham (3 miles south), Shoreham-by-Sea (3 miles south), Fulking (3 miles east) and Kingston by Sea (4 miles south-east). We also work in nearby towns such as Horsham (13 miles north), Worthing (6 miles south-west), Haywards Heath (12 miles north-east), Burgess Hill (9 miles north-east), Littlehampton (11 miles south-west) and Lancing (4 miles south).
Near you in Castle Town
Locally, jobs take us to homes and businesses close to Steyning Grammar School and Hillside Park (parke sa Hiniusang Gingharian) and the streets around them. Castle Town’s nearest station is Shoreham-By-Sea station, roughly 3.2 miles south. Nearby you’ll also find Southlands Hospital (3.1 miles south-east) and Steyning Museum (1.5 miles north-west). Not far away are Mill Hill and Truleigh Hill.
What the job involves on each surface
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. A primer goes on where the product requires one before the bead.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
What affects the cost of external mastic
Call for a quick quote. The main things that affect it are:
- How many areas need sealing
- Which sealant suits the joint
- Any mould that needs treating
- Working hours on commercial sites
What you pay reflects the work, not a rough estimate. That is why we ask about the job first and give you a clear price before any work starts.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- How we’d reach the joints
- Photos by email, if that’s easy
- Where the property is
- If it’s domestic, commercial or a hotel
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.
Places near Castle Town
Also in Castle Town
Why deal with it now?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Around Castle Town, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting. 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.
Why us?
- Tidy, careful work
- Trusted Arbo and Everbuild sealants
- Rated 4.9 stars on Google
- Anti-fungal silicone where joints get wet
Take a look at how sealant jobs are priced and what customers say.
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Leave the joints unpainted unless we’ve said otherwise
- Deal with leaking gutters that soak the joints below
- Never let anyone fill a movement joint with mortar
- Don’t let climbing plants root in the sealant
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
Common questions in Castle Town
Can you help a landlord with a rental near Shoreham-By-Sea station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Do you cover smaller places like Castle Town?
Yes, Castle Town is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so it doesn’t stand out.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
Do you guarantee your work?
Yes. All our work carries our 12-month guarantee.
Do you work for hotels and businesses?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides.
How it works
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and tidy away. Most jobs take a few hours to a few days, depending on the length of joint and the access. In a small place like Castle Town, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- For business premises, tell us about site rules or sign-in
- Mention if the joints have been sealed before
- Move anything stored near the joints
How to get a quote
Every job is quoted individually. Simply phone 0345 464 0079 or email us and describe the job.
Read more
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
For anyone letting property in or around Castle Town, several properties can go on one quote. Send us the addresses and the work at each.
Honest limits
A few problems are outside what sealant work can do:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Subsidence or other structural problems
- Cracks in the bricks or render themselves, away from the joints
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before booking.
Joints and surfaces we work on
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Façade panels
- Render & cladding joints
- Joints between brick and frames