West Sussex · England
Sand Mastic in Cote
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Cote and across West Sussex. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Old cement repairs round a window that have failed
- Gaps where the frame meets the masonry
- Modern sealant on a period surround
Sand mastic in Cote
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. If you’re dealing with cracked mastic round a front door frame and gaps between timber frames and stone or brick, we can put it right, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Cote is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
All our work comes with our one-year guarantee.
- Place
- Cote (BN13)
- Region
- West Sussex
- Cover
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
We also work for property managers and facilities teams in Cote and across West Sussex. Several sites can be quoted together, and we are fully insured for the work.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Other services in Cote
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Check the mastic when you check the paintwork
- Keep modern sealant off the mastic
- Don’t paint over the new mastic
- Get any rot dealt with first
Leave the new mastic alone while it firms up. It skins over quickly but needs longer to fully harden.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Why it’s worth doing now in Cote
An open joint round the frame lets weather in. Left, water can reach the timber and the wall, so dealing with it now protects both. Around Cote, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What you get with us
- We are fully insured
- Every job guaranteed for a year
- 180+ five-star Google reviews
- Arbo and Everbuild products
Read our cost guide or what customers say.
The process
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to a full day, depending on how many windows. In a small place like Cote, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Tell us about access, such as stairs, a lift or high-level joints
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand, and we will come back to you with a quote.
Advice
Sand mastic in Cote: local notes
Cote is within about 3 miles 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. Historic houses like Ecclesden Manor (about 2.5 miles south-west) are a reminder that the area around Cote has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you let a flat or house near Durrington-On-Sea station, older sash windows in a rental need their mastic kept sound to keep the weather out. If you look after a building such as Durrington Junior School, larger buildings have plenty of frames, and the mastic around each one ages.
Cote is about 2 miles north-west of Worthing, in West Sussex. Homes, rented property, offices and hotels in Cote can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our West Sussex coverage runs to 371 places, and Cote is one of them. For nearby work, see our Brighton page, about 13 miles away.
All of BN13 is within our area for sand mastic. Other places close to Cote include Durrington (1 mile south-east), High Salvington (1 mile north-east), Clapham (1 mile west), Patching (2 miles west) and Findon (2 miles north). We also work in nearby towns such as Bognor Regis (12 miles west), Burgess Hill (15 miles north-east), Littlehampton (5 miles south-west), Shoreham-by-Sea (7 miles east), Lancing (4 miles east) and Rustington (4 miles south-west).
Local landmarks in Cote
Around Cote, our work takes us to homes and buildings near Durrington High School, Clapham Wood and Palatine Primary School, among other places. Cote’s nearest station is Durrington-On-Sea station, roughly 1.8 miles south of the centre. Well-known places in the area include The Acre (2.8 miles south-east) and Old Castle (1.7 miles south-east). For a walk, there’s Highdown Hill.
When something else is needed
In fairness, there are a few things sealant will not fix:
- Sashes that rattle, stick or won’t open
- Broken panes
- Decayed frames that need repair
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
What we seal
- Stone surrounds
- Tenement windows
- Sash and case windows
- Brick reveals
- Timber door frames
- Period & listed homes
Cote: your questions answered
Is Cote within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Does living near the coast affect sand mastic in Cote?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are usually the first to need attention.
Are you fully insured?
Yes. We’re fully insured.
How do I get a quote for sand mastic in Cote?
Size, access and the old material all affect the cost. Call for a quick quote and we will talk you through it.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Which is right for my windows, sand mastic or modern sealant?
We’ll talk it through with you. Period homes often look best with sand mastic, and modern sealants suit newer frames.
Can sand mastic be painted?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
Can you replace silicone on a period window with sand mastic?
Yes. We remove the silicone and clean the joint before the sand mastic goes in.
Signs you need sand mastic in Cote
Some old mastic was never deep enough. A thin layer does not hold well so we make sure the new mastic is the right thickness.
Any of these means the joints need attention:
- Open joints round the window box
- Mastic dropping out of the joint
- Patchy fillers round a sash window
- Mastic round period door frames that has failed
For an older house near a landmark such as St Symphorian's Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Questions to ask before booking
- Which colour the sealant will be
- What product goes in the joint
- What happens if they find a problem under the old sealant
- What guarantee comes with the work
What the job involves on each surface
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.