West Sussex · England
Window & door mastic in Crockerhill, West Sussex
Professional window mastic in and around Crockerhill, with every bit of old sealant taken out first.
- Damp patches on the reveal after heavy rain
- Draughts coming in around windows and doors
- Mastic that is falling out in pieces
What we cannot put right
In fairness, some problems need a different trade:
- Worn gaskets, brush seals or a door that has dropped
- Damp problems in the wall away from the window
- Rotten timber, which needs a joiner first
If in doubt, call 0345 464 0079 or email us and we will say what we think before you book.
Surfaces we seal
- Patio & French doors
- Timber windows & doors
- uPVC windows
- Aluminium frames
- Window sills
- Composite doors
About our window mastic in Crockerhill
Every window and door frame has a gap around it, and mastic is what closes it. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. Common call-outs are for hard, cracked sealant around windows and old mastic that has gone black or come away, on window sills, composite doors and patio & French doors.
In a village or hamlet like Crockerhill, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Every job comes with a one-year guarantee, wherever you are in West Sussex.
- Location
- Crockerhill (PO18)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
A cracked joint around a frame lets rain into the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. Where a wall is exposed, as many are in small places like Crockerhill, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
What you get with us
- Arbo and Everbuild products
- White, clear, grey or coloured to suit, where the product allows
- We are fully insured
- An ARBOMaster approved applicator
Read what affects the cost or customer reviews.
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Window mastic in Crockerhill: local notes
Historic houses like Goodwood House (about 2.6 miles north-west) are a reminder that the area around Crockerhill has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is 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.
Rented homes near Barnham station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. If you live in an older home near The Parish Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Crockerhill is about 4 miles east of Chichester, in West Sussex. Whether you are in the middle of Crockerhill or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Crockerhill is one of 371 towns and villages in West Sussex where we work. You can also see our page for Portsmouth, about 17 miles away.
Every address in PO18 is within our area for window mastic. We also cover the places around Crockerhill: East Hampnett (1 mile south-west), Norton (1 mile south-east), Aldingbourne (1 mile south), Nyton (1 mile south-east) and Westergate (2 miles south-east). Further out, we also cover Worthing (13 miles east), Bognor Regis (4 miles south), Chichester (4 miles west), Selsey (9 miles south-west), Littlehampton (7 miles south-east) and Emsworth (11 miles west).
Near you in Crockerhill
We work in homes and buildings around Ormiston Six Villages Academy and The Winterton Arms Public House, among other places. Crockerhill’s nearest station is Barnham station, roughly 2.7 miles south-east. Other landmarks nearby include Tote Copse Castle (1.4 miles south) and Chichester Centre (3.7 miles west). For a walk, there’s Levin Down.
FAQs for Crockerhill
Can you help a landlord with a rental near Barnham station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Do you cover smaller places like Crockerhill?
Yes. Crockerhill is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Where do you work from?
Our base is Crawley. Our area covers South East England, London and Scotland.
Do I need to be at home?
It depends on the job. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Is the new sealant paintable?
Not generally, if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Can you reach windows above the ground floor?
Yes, as long as they can be reached safely. Let us know about access when you ask for a quote and we will plan for it.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
What happens on the day
We work through the job in order: protect, prepare, seal, tidy. Typically it takes anything from an hour or two to a full day, depending on how many frames there are and we leave things clean and tidy. For a village or hamlet like Crockerhill, the journey is planned in advance: 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 check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Mention any sign-in or site rules at work premises
- Move anything stored near the joints
Ask for a quote
Asking for a quote is easy: tell us what needs doing and where. Photos by email help us understand the job.
Advice
Common problems we fix in Crockerhill
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, leaving a hairline gap down one side.
These are the problems we are asked about most:
- Gaps where the sill meets the wall
- Whistling draughts around closed windows
- Cracked or shrunken mastic around the frame
- Old mastic that has gone black or come away
If you look after a building such as Tangmere Primary Academy, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- What happens if the job turns out different
- Is the old sealant removed completely?
- What insurance they hold
- How the colour is chosen
Places near Crockerhill
What else we do in Crockerhill
Work for landlords, hotels and businesses
If you manage several properties in or around Crockerhill, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
Letting agents and landlords in Crockerhill can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
Surface by surface
Composite doors
Front doors take the weather head on, and the top and bottom corners tend to fail first. We pay most attention there.
Aluminium frames
Aluminium needs a sealant that bonds to coated metal, and acetoxy silicones aren’t used, as they can attack some metals. Neutral-cure sealant is the safe choice.