West Sussex · England
External & façade joints in Lower Horncroft, West Sussex
Sealing brickwork movement joints, render, cladding and façade joints for Lower Horncroft, backed by a 12-month guarantee. Ask us for a quote.
- Leaking joints around cladding and façade panels
- Sealant that has lost its bond to the brick or render
- Water getting into walls through failed joints
External mastic in Lower Horncroft, done properly
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. We work on concrete & block, joints between brick and frames and brickwork movement joints, and the jobs we see most are moss and dirt in joints with no sealant left and cracked joints where brick meets render or frames.
Older homes in small places like Lower Horncroft may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in, and they need the right sealant at the right depth.
Our work is backed for twelve months, in Lower Horncroft and everywhere else we cover.
- Place
- Lower Horncroft (RH20)
- Wider area
- West Sussex
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How the visit works
The work is kept neat and contained to the joints we are treating, so you can carry on as normal. The job usually takes a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Lower Horncroft, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Mention if the joints have been sealed before
- Mention any sign-in or site rules at work premises
Get a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
Advice
How the job changes by surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so its sealant has to stay flexible.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
Outside joints around Lower Horncroft
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. With historic houses such as Bignor Roman Villa (about 2.2 miles south-west) nearby, there’s older building stock in the area around Lower Horncroft as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
For landlords with property near Pulborough station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. For an older house near a landmark such as Church of St Agatha, an extension built onto an older house moves differently, and the joint between them takes the strain. Schools such as Fittleworth CofE Village School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Lower Horncroft is about 10 miles north of Littlehampton, in West Sussex. Homes, rented property, offices and hotels in Lower Horncroft can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. 371 places in West Sussex are on our list, from the larger towns to small villages. Our Crawley page covers work nearby, about 20 miles away.
Postcode districts we cover here for external mastic: RH20. Neighbouring places we cover for external mastic include Coates (1 mile west), Fittleworth (1 mile north), Watersfield (1 mile south), Coldwaltham (1 mile south-east) and Bedham (1 mile north). Larger places within reach include Horsham (13 miles north-east), Worthing (11 miles south-east), Bognor Regis (12 miles south-west), Chichester (12 miles south-west), Littlehampton (10 miles south) and Shoreham-by-Sea (15 miles south-east).
Local landmarks in Lower Horncroft
Around Lower Horncroft, our work takes us to homes and buildings near The Swan Hotel and Lodge Hill Residential Centre. The closest station to Lower Horncroft is Pulborough station, about 2.3 miles east. Nearby you’ll also find Coates Castle (0.9 miles west) and Coultershaw Heritage Site (2.4 miles north-west). Green spaces nearby include Amberley Wildbrooks RSPB Reserve and Bignor Hill.
Aftercare tips
So the new joints stay in good condition:
- Point out the joints to other trades
- Never let anyone fill a movement joint with mortar
- Act on the first splits you see
- Avoid pressure-washing directly into sealant joints
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
Towns and villages near Lower Horncroft
Other services in Lower Horncroft
What happens if it’s left?
Resealing a run of joints in one go is normally better than patching one at a time. They’ve weathered the same way, and access only has to be arranged once. Around Lower Horncroft, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
What you get with us
- You choose the colour before work begins
- White, clear, grey or another colour, product permitting
- More than 20 years in sealant work
- An ARBOMaster approved applicator
What affects the quote in Lower Horncroft
Jobs vary more than people expect. The main factors:
- The product the joint needs
- Access and height
- Whether there’s mould to deal with
- Any working-time requirements on site
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Lower Horncroft: your questions answered
Can you do external mastic in Lower Horncroft?
Yes, Lower Horncroft is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Will you come out to Lower Horncroft?
Yes, Lower Horncroft is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you have insurance?
Yes. We are fully insured.
Do you work for landlords and businesses?
Yes, we do. We work in homes, commercial premises and hotels.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose, and the wall may crack nearby. We’ll reseal it with a flexible sealant.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
DIY sealant or a professional job?
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.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
When it is not the sealant
Sealant is not the answer to every problem, and we’ll tell you before we start. Sealant won’t put right:
- Movement that’s more than a sealant joint can take
- Cracks in the bricks or render themselves, away from the joints
- Loose or hollow render, which needs re-rendering
If in doubt, call 0345 464 0079 or send us an email and we will say what we think before booking.
What we seal
- Render & cladding joints
- Façade panels
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames