West Sussex · England
Flansham Window Mastic
Specialist window mastic for Flansham: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Gaps where the sill meets the wall
- Cracked or shrunken mastic around the frame
- White mastic on grey or black frames
Surface by surface
Window sills
Stone and concrete sills have their own joints, including the one between the sill and the frame above. We seal those with a sealant suited to masonry.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. We will point out any rot we find, as that is a job for a joiner.
Window mastic in Flansham
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. If you have damp patches on the reveal after heavy rain and leaking joints at the ends of sills, we can help.
Homes in small places like Flansham often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
A 12-month guarantee comes as standard, so you are covered after we’ve gone.
- Place
- Flansham (PO22)
- Wider area
- West Sussex
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Do you need window mastic in Flansham?
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, so it comes away long before its time.
It’s worth asking for a quote if you see:
- Whistling draughts around closed windows
- Cracked internal joints between frame and plaster
- Mastic that is falling out in pieces
- Damp patches on the reveal after heavy rain
For site and facilities teams at buildings such as Bishop Tufnell CofE Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Before booking anyone
- When the joint can take water or movement
- Is the old sealant removed completely?
- How long the guarantee is
- Are they insured?
Work for landlords, hotels and businesses
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Why deal with it now?
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. A reseal is a much smaller job. Around Flansham, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Call for a quick quote and we’ll go through it with you.
What you get with us
- Tidy, careful work
- Homes, businesses and hotels
- We are fully insured
- 180+ five-star Google reviews
Read what affects the cost or customer reviews.
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
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.
Nearby places to Flansham
Also in Flansham
Windows and doors in Flansham
Flansham is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around window and door frames, especially on the side facing the sea. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Barnham station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. For an older house near a landmark such as Bilsham Chapel, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Flansham is about 2 miles north-east of Bognor Regis, in West Sussex. Homes, rented property, offices and hotels in Flansham can book us for window mastic. Every job comes with our one-year guarantee. Flansham is one of 371 places in West Sussex we cover. Portsmouth is on our list too, about 19 miles from Flansham.
Here we cover the PO22 postcode area for window mastic. We also cover the places around Flansham: Bilsham (1 mile east), Lidsey (2 miles north-west), Shripney (2 miles west), Yapton (2 miles north-east) and Barnham (2 miles north). We also work in nearby towns such as Worthing (11 miles east), Chichester (7 miles west), Selsey (8 miles south-west), Littlehampton (5 miles east), Lancing (14 miles east) and Emsworth (13 miles west).
Landmarks near Flansham
In Flansham, that means homes and buildings near Felpham Community College and The Brooks Local Nature Reserve, among other places. Flansham’s nearest station is Barnham station, roughly 1.9 miles north. Well-known places in the area include Tote Copse Castle (3.1 miles north-west) and Bognor Regis Museum (2.3 miles south-west).
How we quote for window mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How easy the joints are to reach
- Any mould that needs treating
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and give you a clear price before work begins.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- If someone has resealed it before
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
- The rough size of the job
For window mastic in Flansham, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
FAQs for Flansham
Do you work for landlords with property near Barnham station?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear quote.
Does living near the coast affect window mastic in Flansham?
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.
Can you do the inside joint as well?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
Do you come to Flansham?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland, Flansham included.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
How long will my window job take?
That depends on the number of frames, how they’re reached and the state of the old mastic. We’ll tell you how long your job needs when we quote.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or drop us an email.
When is the sealant fully cured?
Cure times vary by product and the conditions. Before we leave, we will tell you the cure time.
How the visit works
We bring everything the job needs with us, so you don’t need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. It normally takes a morning for a couple of windows and a door. For a village or hamlet like Flansham, the journey is planned in advance: 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 how each frame can be reached safely.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- On commercial sites, let us know about site rules
- Mention if the joints have been sealed before
Getting a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.