West Sussex · England
Window & door mastic in Westbourne, West Sussex
Mastic around window and door frames, sills and patio doors for homes and businesses in Westbourne and across West Sussex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Untidy mastic left by window fitters
- White mastic on grey or black frames
- Draughty joints inside around the window
Window mastic in Westbourne, done properly
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through. If the draught is through the window seals instead, we will tell you. If you’re dealing with white mastic on grey or black frames and leaking joints at the ends of sills, we can help, on aluminium frames, window sills and uPVC windows alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Westbourne is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Whatever the size of the job, you get the same 12-month guarantee in Westbourne and across West Sussex.
- Location
- Westbourne (PO10)
- Region
- West Sussex
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What window mastic looks like in Westbourne
Westbourne is within about 2 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 window and door frames, which can dry out and crack sooner where a building faces the weather. With historic houses such as Warblington Castle (about 2.2 miles south-west) nearby, there’s older building stock in the area around Westbourne as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you live in an older home near St John the Baptist's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Letting a property close to Emsworth station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Westbourne is about 3 miles east of Havant, in West Sussex. Every kind of property in Westbourne can book us for window mastic. The work is guaranteed for a year. Across West Sussex, we cover 371 places, Westbourne among them. Our Portsmouth page covers work nearby (8 miles or so).
All of PO10 is within our area for window mastic, from the main roads to the quietest streets. If you need window mastic at a property on The Square, Church Road and Crockford Road or a nearby road, our applicators can take on the job. Neighbouring places we cover for window mastic include Lumley (1 mile south), Woodmancote (1 mile east), Emsworth (1 mile south-west), Southbourne (1 mile south-east) and Denvilles (2 miles west). We also work in nearby towns such as Bognor Regis (12 miles south-east), Chichester (7 miles east), Selsey (11 miles south-east), Portfield (7 miles east), Yapton (14 miles east) and East Wittering (7 miles south).
Around Westbourne
Locally, jobs take us to homes and businesses close to Stansted Park, The Good Intent Public House and Bourne Community College. The closest station to Westbourne is Emsworth station, about 1 mile south-west. A little further out are Warblington Castle (2.2 miles south-west) and Havant War Memorial Hospital (2.8 miles west). Not far away are Stoke Down and Brook Meadow (Emsworth).
What happens if it’s left?
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. In a small place like Westbourne, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- White, clear, grey or another colour, product permitting
- Any old sealant cut out fully, not covered over
- Tidy, careful work
- Sanitary silicone with an anti-fungal additive in wet areas
The process
There isn’t much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes anything from an hour or two to a full day, depending on how many frames there are from start to finish. In a small place like Westbourne, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
How to get a quote
For window mastic in Westbourne, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
Advice
Do you need window mastic in Westbourne?
A lot of older mastic was never designed to stay flexible. Once it has hardened, the frame’s movement tears it from the wall, and a gap opens along one edge.
Common reasons people contact us include:
- Damp patches on the reveal after heavy rain
- Rushed sealant from a window installation
- Mastic that is falling out in pieces
- Cold air getting in at the frame edge
Managing a site like Westbourne Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- What happens if the job turns out different
- Is the old sealant removed completely?
- How long to leave it before use
- What the quote includes, VAT included or not
What affects the cost of window mastic
Your quote is based on your job. We take into account:
- Working hours on commercial sites
- How much there is to do
- Whether the work is at height
- The old material and how stubborn it is
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
What we need to know
Before you ask for a quote, have a think about:
- The rough size of the job
- What’s wrong with the joints now
- Pictures of the joints, sent by email
- Where the property is
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or drop us an email.
What the job involves on each surface
Composite doors
Draughts round the door leaf normally come from worn seals or adjustment, not the mastic. We’ll tell you if that is what we find.
Patio & French doors
Heavy door frames can move more than windows. The sealant must cope with it.
When something else is needed
Before booking, it’s worth knowing the limits:
- Faulty window hardware
- Soft or decayed wood in the frame
- Worn gaskets, brush seals or a door that has dropped
If in doubt, phone 0345 464 0079 or email us and we will say what we think before booking.
What we seal
- uPVC windows
- Patio & French doors
- Timber windows & doors
- Window sills
- Composite doors
- Aluminium frames
Westbourne questions
Is window mastic in a coastal place like Westbourne any different?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Can you help a landlord with a rental near Emsworth station?
Yes, we work for landlords and agents. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Are you fully insured?
Yes. We’re fully insured.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Can I add another job to the visit?
Yes. More than one area can be quoted together.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Where are you based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Towns and villages near Westbourne
What else we do in Westbourne
For landlords and businesses
We also work for property managers and facilities teams. Several sites can go on one quote.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.