West Sussex · England
External Mastic in Clayton
Sealing brickwork movement joints, render, cladding and façade joints in Clayton, with a one-year guarantee on every job. Call for a quick quote.
- Sealant pulling away from one side of the joint
- Joints pointed up with cement by mistake
- Weeds or debris growing in open joints
DIY versus a professional finish
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.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
External mastic for homes and businesses in Clayton
For buildings in Clayton, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean joint faces and the right depth. We are often asked to deal with sealant pulling away from one side of the joint and plants rooting in failed movement joints, on façade panels, concrete & block and brickwork movement joints.
Somewhere as small as Clayton, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Place
- Clayton (BN6)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Clayton
Other services in Clayton
Landlord and commercial work in Clayton
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
How the visit works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from a few hours to several days, depending on the building, and the area is left clean. Somewhere as small as Clayton, access is often the only tricky part. 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.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Clear items away from the joints we’re working on
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
Get a quote
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. We’ll explain what we’d do and send you a clear quote before work begins.
Read more
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. Around Clayton, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Doing several joints on one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why book with us
- Colour picked to suit the job
- You choose the colour before work begins
- We are fully insured
- Homes, businesses and hotels
See what affects the cost and customer reviews.
Honest limits
A few problems are outside what sealant work can do:
- Adding movement joints to masonry that has none
- Loose or hollow render, which needs re-rendering
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Joints and surfaces we work on
- Render & cladding joints
- Copings & trims
- Façade panels
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
FAQs for Clayton
Can you help a landlord with a rental near Hassocks station?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear quote.
Can you do external mastic in Clayton?
Yes, Clayton is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll send you a clear quote.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What’s an expansion joint in brickwork?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Is it OK to seal over old sealant?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
What affects the quote in Clayton
Your quote is based on your job. We take into account:
- The product the joint needs
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
- When we can work, for business premises
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, ring 0345 464 0079 or email us for an honest opinion and a quote.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Access, such as stairs, a lift or height
- The problem you’ve noticed
- A few pictures by email, if you can
- Whether it’s a home or a business
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work and send you a clear quote.
Clayton buildings and the weather
With historic houses such as Preston Manor & Gardens (about 4.7 miles south) nearby, there’s older building stock in the area around Clayton as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Homes close to St John the Baptist's Church include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain. Rented homes near Hassocks station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Clayton is about 3 miles south of Burgess Hill, in West Sussex. For external mastic in and around Clayton, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover West Sussex from our Crawley base. Across West Sussex, we cover 371 places, Clayton among them.
All of BN6 is covered for external mastic. We cover properties on Spring Lane, Underhill Lane and Brighton Road and the roads around them. We also cover the places around Clayton: Keymer (1 mile north-east), Hassocks (1 mile north), Ditchling (2 miles north-east), Westmeston (2 miles east) and Hurst Wickham (2 miles north-west). Larger places within reach include Crawley (14 miles north), Horsham (13 miles north-west), Worthing (13 miles south-west), Haywards Heath (6 miles north), Burgess Hill (3 miles north) and Shoreham-by-Sea (7 miles south-west).
What’s near Clayton
Typical jobs here are in homes near Downlands Community School and The Greyhound Public House, among other places. The closest station to Clayton is Hassocks station, about 1 mile north. Nearby you’ll also find Clayton Castle (under half a mile south-west) and The Budding Foundation Museum of Gardening (0.9 miles north-west). The countryside around Clayton includes Wolstonbury Hill and Ladies Mile.
Signs you need external mastic in Clayton
Some movement joints have been pointed up with mortar. The joint cannot move, so the wall cracks somewhere else instead.
It’s worth asking for a quote if you see:
- Failed sealant between panels on a façade
- Water getting into walls through failed joints
- Failed seals between different materials
- Weeds or debris growing in open joints
If you look after a building such as The Windmills Junior School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Comparing quotes
- What preparation is included
- What the quote includes, VAT included or not
- Which sealant they’ll use, and why
- Whether they’re fully insured