East Sussex · England
Sand mastic for sash & case windows in Selmeston, East Sussex
Specialist sand mastic for Selmeston: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Mastic worn away on windows facing the weather
- Gaps round a timber door in stone or brick
- Tired mastic found when preparing windows for paint
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sand mastic in Selmeston
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, applied by hand. On older homes, it suits the building far better than silicone. If you’re dealing with mastic round period door frames that has failed and mastic that needs renewing before redecorating, we can help.
Around Selmeston, 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.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Selmeston (BN26)
- Wider area
- East Sussex
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Different surfaces, different methods
Stone surrounds
The stone is treated with care while raking out the old mastic.
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. We renew it the same way as on windows.
How it works
Good joint work is mostly preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a single window, longer for several. Somewhere like Selmeston needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Mention any tricky access
- For business premises, tell us about site rules or sign-in
- Tell us if parking is tricky
Ask for a quote
For sand mastic in Selmeston, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
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Common problems we fix in Selmeston
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
It’s worth asking for a quote if you see:
- Draughts and rain around sash boxes
- Gaps where the frame meets the masonry
- Cracked mastic round a front door frame
- Mastic worn away on windows facing the weather
Rented homes near Berwick (Sussex) station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- What the cure time is
- Who does the work, and how experienced they are
- What guarantee comes with the work
- Whether they’re fully insured
Selmeston questions
Is Selmeston within the area you cover?
Yes, Selmeston 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.
Can you do sand mastic in Selmeston?
Yes, Selmeston is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Does someone need to be in?
That depends on where the joints are. Inside work needs someone to give us access.
Is consent needed for window work on a listed home?
It’s best to ask your local planning authority first. Like-for-like sand mastic is often the preferred finish, but they decide.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all.
Do you offer different sealant colours?
Most of the time, yes. We will tell you which colours the right product comes in and agree one before any work starts.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Check the mastic when you check the paintwork
- Have rotten timber repaired before new mastic goes in
- Clear gutters so water doesn’t pour onto the windows
- Check with your local planning authority if your home is listed
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Landlord and commercial work in Selmeston
We work for letting agents and landlords as well as homeowners. Resealing between tenancies keeps a property looking cared for.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Why deal with it now?
If you are redecorating, renew the mastic first. Painting over failed mastic does not seal it, and the new mastic is traditionally left unpainted. Older cottages and farmhouses around Selmeston can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Combining jobs into one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why choose Mr Mastic in Selmeston
- Over 20 years’ experience
- Rated 4.9 stars on Google
- Quality sealants from Arbo and Everbuild
- A 12-month guarantee on all work
Take a look at our cost guide or our reviews.
What else we do in Selmeston
Windows and doors in Selmeston
With historic houses such as Charleston Farmhouse (about 1.2 miles west) nearby, there’s older building stock in the area around Selmeston as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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.
For an older house near a landmark such as The Parish Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Selmeston is about 5 miles north of Seaford, in East Sussex. From the centre of Selmeston to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 289 towns and villages across East Sussex, large and small. You can also see our page for Brighton, about 12 miles away.
Jobs for sand mastic in BN26 is quoted and booked the same way as anywhere else. If you need sand mastic at a property on The Street and Lewes Road or anywhere close by, we can help. Close by, we work in Alciston (1 mile south), Berwick (1 mile east), Ripe (2 miles north), Winton (2 miles south) and Wickstreet (2 miles north-east). Within a short drive, we also cover Eastbourne (7 miles south-east), Bexhill-on-Sea (14 miles east), Seaford (5 miles south), Lewes (6 miles west), Hailsham (5 miles east) and Crowborough (14 miles north).
What’s near Selmeston
Typical jobs here are in homes near The Barley Mow pub, among other places. The closest station to Selmeston is Berwick (Sussex) station, about 1 mile east of the centre. Other landmarks nearby include Drusillas Museum (1.8 miles south-east) and Chailey Heritage Marine Hospital (5.3 miles south-west). The countryside around Selmeston includes Firle Beacon.