West Sussex · England
External & façade joints in Shoreham-by-Sea, West Sussex
Sealing brickwork movement joints, render, cladding and façade joints in Shoreham-by-Sea, with a 12-month guarantee on every job. Ask us for a quote.
- Rigid filler in a joint that should flex
- Sealant that has lost its bond to the brick or render
- Moss and dirt in joints with no sealant left
What we do, step by step
You don’t need to clear the whole room or building, only the area right around the joints. We protect the rest, and the work takes a few hours for a handful of joints, longer for a whole elevation for a typical job. Parking in a town like Shoreham-by-Sea is normally straightforward, but tell us if there’s a driveway or any restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Clear items away from the joints we’re working on
- On commercial sites, let us know about site rules
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work.
Advice
External mastic for homes and businesses in Shoreham-by-Sea
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We strip the joint back and start again. We’re often asked to deal with sealant that has lost its bond to the brick or render and hard, crazed mastic that has stopped moving, on render & cladding joints, joints between brick and frames and concrete & block.
Shoreham-by-Sea mixes older houses and their gutters with newer estates of brick, render and uPVC trims. All of those joints move, so they need a flexible sealant rather than a rigid filler.
Each job carries a 12-month guarantee, large or small.
- Where
- Shoreham-by-Sea (BN43, BN15, BN42)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How the job changes by surface
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Honest limits
In fairness, some problems need a different trade:
- Damp that is not coming from the joint
- Cutting new joints into brickwork, which is building work rather than sealant work
- Movement that is more than a sealant joint can take
If in doubt, call 0345 464 0079 or send us an email and we will say what we think before you book.
What we seal
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Façade panels
- Render & cladding joints
Common problems we fix in Shoreham-by-Sea
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
Look out for any of the following:
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
- Sealant pulling away from one side of the joint
- Movement joints with cracked, split or missing sealant
Letting a property close to Shoreham-By-Sea station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- Is the old sealant removed completely?
- What product goes in the joint
- What happens if they find a problem under the old sealant
- Who does the work, and how experienced they are
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 fails, we can still redo it.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Places near Shoreham-by-Sea
What else we do in Shoreham-by-Sea
FAQs for Shoreham-by-Sea
Do you work for landlords with property near Shoreham-By-Sea station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Can you do external mastic in Shoreham-by-Sea?
Yes. Our work covers London and the South East, and Shoreham-by-Sea is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing.
Can you seal joints between render and window frames?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides with primer where required.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
How long will you be here?
A typical job takes anything from a few hours to several days, depending on the building, including preparation and clearing up. We’ll confirm how long when we quote.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
- Whether the work is at height
- How much there is to do
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will go through it with you.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- A few photos by email, if you can
- Any previous sealing or DIY work
- The type of property
- Where the job is, and your postcode
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
What external mastic looks like in Shoreham-by-Sea
Shoreham-by-Sea 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. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Buckingham Park Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. For an older house near a landmark such as St Mary de Haura Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Shoreham-by-Sea is about 4 miles west of Brighton and Hove, in West Sussex. Every kind of property in Shoreham-by-Sea can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 371 places across West Sussex, from the larger towns to small villages. You can also see our page for Brighton, roughly 6 miles from Shoreham-by-Sea.
Every address in BN43, BN15 and BN42 is covered for external mastic. Streets in the area include Adelaide Square, High Street and Rainbow Square, and we cover them all. You’ll find Shoreham-by-Sea on the A27 and A259, which makes it straightforward to reach. If you are just outside Shoreham-by-Sea, we cover Old Shoreham (1 mile west), Kingston by Sea (1 mile east), Adur (1 mile north-west), Southwick (2 miles east) and Portslade (2 miles east). Further out, we also cover Worthing (6 miles west), Haywards Heath (14 miles north-east), Burgess Hill (10 miles north-east), Littlehampton (12 miles west), Rustington (11 miles west) and Storrington (10 miles north-west).
Local landmarks in Shoreham-by-Sea
Locally, jobs take us to homes and businesses close to Shoreham College, The Crabtree pub and Shoreham Academy. Shoreham-by-Sea has its own railway station: Shoreham-By-Sea station. Well-known places in the area include Southlands Hospital (0.6 miles north-east). Green spaces nearby include Thundersbarrow Hill and Shoreham Beach.
Aftercare tips
After the cure time, these simple habits help:
- Check the sealant is paintable before painting near it
- Fix overflowing gutters above sealed joints
- Tell anyone working on the walls about the movement joints
- Have failed joints looked at early
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead and let water in behind.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years so early resealing is worth it.