West Sussex · England
Atherington Sand Mastic
Specialist sand mastic for Atherington: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Open joints round the window box
- Silicone on a period window that looks wrong
- Window mastic to renew ahead of painting
About our sand mastic in Atherington
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. We’re often asked to deal with draughty sash windows at the surround and window mastic to renew ahead of painting, on sash and case windows, timber door frames and stone surrounds.
Around Atherington, 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.
All our work is covered by our one-year guarantee, wherever you are in West Sussex.
- Location
- Atherington (BN17)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of sand mastic
The price is agreed before any work begins. It’s based on:
- How much old sealant there is and how hard it is to remove
- When we can work, for business premises
- The product the joint needs
- The number and length of the joints
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email and we’ll talk you through it.
Helping us quote
Photos help, but a description is a good start. Please mention:
- Where the job is, and your postcode
- Whether it’s a home or a business
- Whether it has been sealed before
- What’s wrong with the joints now
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or send us an email with the details and send photos if you have them.
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Sand mastic in Atherington: local notes
Atherington is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. 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.
Managing a site like St Mary's CofE Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. Letting a property close to Littlehampton station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Atherington is about 2 miles west of Littlehampton, in West Sussex. Every kind of property in Atherington can book us for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. Atherington is one of 371 places in West Sussex where we work. There’s also a page for Brighton, roughly 20 miles from Atherington.
Postcode districts we cover here for sand mastic: BN17. If you are just outside Atherington, we cover Climping (1 mile north), Horsemere Green (1 mile north-west), Ford (2 miles north), Wick (2 miles north-east) and Littlehampton (2 miles east). Further out, we also cover Worthing (8 miles east), Bognor Regis (5 miles west), Chichester (9 miles west), Selsey (10 miles south-west), Shoreham-by-Sea (14 miles east) and Lancing (11 miles east).
Near you in Atherington
Locally, jobs take us to homes and businesses close to The Littlehampton Academy and The Black Horse Public House, among other places. Atherington’s nearest station is Littlehampton station, about 1.5 miles east. A little further out are Lyminster Siege Castle (3.8 miles north-east) and Rustington Museum (3.3 miles east). Open spaces near Atherington include WWT Arundel.
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
When to call us in Atherington
Previous repairs in cement or silicone often trap water or crack away. They do not suit the joint, and they normally need raking out.
The most common problems we see are:
- Gaps between timber frames and stone or brick
- Failed mastic on an exposed elevation
- Modern sealant on a period surround
- Mastic dropping out of the joint
Homes close to Bailiffscourt Chapel include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- When the joint can take water or movement
- What the quote includes, VAT included or not
- Whether they’re fully insured
- How the colour is chosen
What we do, step by step
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours for a single window, longer for several. In a small place like Atherington, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Mention any tricky access
- Mention any sign-in or site rules at work premises
- Let us know if you’ve seen damp or leaks
Getting a quote
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before work begins.
Advice
Your questions about sand mastic in Atherington
Do you work for landlords with property near Littlehampton station?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. You can phone 0345 464 0079 or email us with the details for a clear quote.
Does the coastal weather in Atherington affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
How long does the job take?
It depends on the size of the job, but as a guide it takes anything from a few hours to a full day, depending on how many windows. We will give you a better idea when we quote.
What’s sand mastic made of?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and finished to sit neatly against the masonry.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
How long does sand mastic take to harden?
It forms a skin fairly soon and it hardens fully over a longer time. Timing depends on the weather and the joint.
Which products do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Is it OK to seal over old sealant?
No, it will not last. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What happens if it’s left?
Not every filler suits an old window surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. Around Atherington, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why book with us
- Quality sealants from Arbo and Everbuild
- Domestic, commercial and hotel work
- More than 20 years in sealant work
- We leave the area clean and tidy
Read our cost guide or what customers say.
When it isn’t the sealant
We will always be straight with you, so here’s what sealant cannot fix:
- Decayed frames that need repair
- Broken panes
- Sashes that rattle, stick or will not open
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Brick reveals
- Sash and case windows
- Stone surrounds
- Tenement windows
- Period & listed homes
- Timber door frames