West Sussex · England
Adur Window Mastic
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Adur. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Hard, cracked sealant around windows
- Water coming in at the bottom corners of a door
- Black, perished sealant on frames
Window mastic in Adur
Every window and door frame has a gap around it, and mastic is what closes it. When it cracks, hardens or pulls away, draughts and rain get in. The old mastic is removed and the joint resealed with a flexible exterior sealant. We work on window sills, patio & French doors and aluminium frames, and the jobs we see most are leaking joints at the ends of sills and white mastic on grey or black frames.
Somewhere as small as Adur, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Adur (BN43, BN15)
- Region
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of window mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The number of rooms or windows
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that’s easy
- Roughly how big the job is
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
What the job involves on each surface
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain can’t run into the wall.
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We will tell you if that is what we find.
What else we do in Adur
Honest limits
We won’t take on work that will not last, so here’s what sealant cannot put right:
- Worn gaskets, brush seals or a door that has dropped
- A failed sealed unit that has misted up
- Broken hinges, locks or handles
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly.
Where we work in Adur
- Window sills
- Patio & French doors
- Timber windows & doors
- uPVC windows
- Aluminium frames
- Composite doors
How the visit works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. In a small place like Adur, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Move anything stored near the joints
- For business premises, tell us about site rules or sign-in
- Let us know if you’ve seen damp or leaks
Getting a quote
If you are in Adur and need window mastic, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before work begins.
Related advice
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Wash the frames with mild soapy water
- Paint up to the joint, not over it
- Keep drainage slots and sill grooves clear
- Avoid blasting the frames with a pressure washer
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
Landlord and commercial work in Adur
Housing providers, facilities teams and property managers book us too in Adur and across West Sussex. We can quote a run of properties together, and we are fully insured.
If you manage several properties in or around Adur, several properties can go on one quote. Send us the addresses and the work at each.
Window mastic in Adur: local notes
Adur is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. 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.
Schools such as The Sir Robert Woodard Academy are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Shoreham-By-Sea station, renewing tired window mastic between tenants heads off draught and damp complaints. In the older streets around St Nicolas' Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Adur is about 1 mile north-west of Shoreham-by-Sea, in West Sussex. If you need window mastic in Adur, please phone 0345 464 0079 or email us for a quick quote. We’re based in Crawley and cover West Sussex, Adur included. Adur is one of 371 places in West Sussex where we work. You can also see our page for Brighton, about 7 miles away.
All of BN43 and BN15 is within our area for window mastic, from the main roads to the quietest streets. Local streets include Steyning Road, Coombes Road and Mill Hill, all of which we cover. Neighbouring places we cover for window mastic include Old Shoreham (1 mile south), Shoreham-by-Sea (1 mile south-east), Castle Town (2 miles north), Kingston by Sea (2 miles east) and Southwick (3 miles south-east). Further out, we also cover Horsham (15 miles north), Worthing (5 miles south-west), Haywards Heath (13 miles north-east), Burgess Hill (10 miles north-east), Littlehampton (11 miles west) and Rustington (10 miles west).
Near you in Adur
Locally, jobs take us to homes and businesses close to Sussex Pad pub. The closest station to Adur is Shoreham-By-Sea station, roughly 1.5 miles south-east. Well-known places in the area include Steyning Museum (2.9 miles north-west) and Old Castle (4.9 miles south-west). Green spaces nearby include Lancing Ring and Mill Hill.
Why act early in Adur
Running fresh sealant over the old joint is tempting, but new sealant cannot bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. Older cottages and farmhouses around Adur can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the amount of work, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts.
Why Adur customers choose us
- ARBOMaster approved applicator
- Anti-fungal silicone where joints get wet
- Every job guaranteed for a year
- Neat joints and a tidy finish
See our cost guide or our reviews.
Your questions about window mastic in Adur
Is window mastic in a coastal place like Adur any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is Adur within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work on first-floor windows?
Yes, where they can be reached safely. Tell us about access when you get in touch so we can plan the job.
What does window mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or email us and tell us what needs doing and where.
How long should I leave it?
It depends on the product. We tell you how long to leave it before we go.
Can I paint over the new sealant?
That depends on the product. Silicone isn’t paintable, but some hybrid sealants are. Tell us if you are decorating and we’ll choose accordingly.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or send us an email.