West Sussex · England
Sand Mastic in Clayton
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Clayton. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps between timber frames and stone or brick
- Mastic that needs renewing before redecorating
Aftercare tips
A little care helps the new joints last. Our advice:
- Go gently near the mastic when preparing windows
- Find out about consent before window work on a listed home
- Ask us before painting near the mastic
- Sort the mastic before the decorators arrive
Do not touch or press the mastic while it hardens. It forms a skin fairly soon, but takes longer to harden fully.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Sand mastic for homes and businesses in Clayton
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. If you have open joints round the window box and gaps round a timber door in stone or brick, we can help.
Around Clayton, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Clayton (BN6)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Clayton homes 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. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as The Windmills Junior School, the mastic around its windows and doors needs looking after like any other building’s. Homes close to St John the Baptist's Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Clayton is about 3 miles south of Burgess Hill, in West Sussex. For sand mastic in and around Clayton, please call 0345 464 0079 or send us an email for a quick quote. We cover West Sussex from our Crawley base, Clayton included. Across West Sussex, we cover 371 places, and Clayton is one of them.
Work in BN6 works the same way as everywhere else we cover. You’ll find streets such as Spring Lane, Underhill Lane and Brighton Road. If you are just outside Clayton, we cover 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). We also work in nearby towns such as 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).
Landmarks near Clayton
Locally, jobs take us to homes and businesses close to Downlands Community School and The Greyhound Public House and the streets around them. The closest station to Clayton is Hassocks station, about 1 mile north of the centre. Other landmarks nearby include Clayton Castle (less than half a mile south-west) and The Budding Foundation Museum of Gardening (0.9 miles north-west). Not far away are Wolstonbury Hill and Ladies Mile.
Why it’s worth doing now in Clayton
Draughts round a sash window are not always the sashes. Open mastic joints round the box can let air in and new mastic seals them. In a small place like Clayton, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Why us?
- Old sealant always removed completely
- Full insurance on every job
- Trusted Arbo and Everbuild sealants
- An ARBOMaster approved applicator
Read what affects the cost or what customers say.
What sealant work can’t fix
We’ll always be straight with you, so here’s what sealant can’t fix:
- Planning or listed building consent (your local planning authority decides)
- Damaged stone surrounds
- Putty and glazing repairs
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
Joints and surfaces we work on
- Tenement windows
- Sash and case windows
- Timber door frames
- Stone surrounds
- Brick reveals
- Period & listed homes
FAQs for Clayton
Do you cover Clayton for sand mastic?
Yes, Clayton is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear quote.
I let a flat near Hassocks station. Can you help?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we’ll advise.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses and we’re fully insured.
How do I get a quote for sand mastic in Clayton?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or send us an email with a short description of the job.
What guarantee comes with the work?
Our 12-month guarantee applies on every job.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Can I do it myself?
It depends on the job. 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.
When to call us in Clayton
Shallow joints are a common cause. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
Look out for these signs:
- Tired mastic found when preparing windows for paint
- Failed mastic on an exposed elevation
- Mastic dropping out of the joint
- Patchy fillers round a sash window
Rented homes near Hassocks station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- How the joint is cleaned and prepared
- Whether you can choose the colour
- Whether the sealant suits the joint
- How hidden problems are handled
Landlords, agents and businesses in Clayton
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
What happens on the day
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to a full day, depending on how many windows. Somewhere like Clayton needs a little journey planning: 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 the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
- On commercial sites, let us know about site rules
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Also near Clayton
What else we do in Clayton
What the job involves on each surface
Sash and case windows
On a sash window, the mastic joint shows on the outside, so a neat, even finish matters.
Period and listed homes
On a listed home or in a conservation area, the right material matters. Like-for-like sand mastic is usually favoured.