West Sussex · England
South Bersted Window Mastic
We cover South Bersted for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Cracked sealant at the sill ends
- Rain getting in at the frame or under the sill
- Untidy mastic left by window fitters
Why act early in South Bersted
Getting a straight, even bead on an outside frame takes practice, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. In a smaller place like South Bersted, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
What you get with us
- 20+ years of sealant experience
- Old sealant always removed completely
- Neat joints and a tidy finish
- One-year guarantee on every job
Take a look at what affects the cost and what customers say.
Window mastic in South Bersted, done properly
From a single sill to a whole house of windows, you will get a clear quote before work begins. Just call 0345 464 0079 or email us and tell us how many frames there are and how they’re reached. We work on uPVC windows, patio & French doors and composite doors, and common reasons people get in touch are cold air getting in at the frame edge and cracked or shrunken mastic around the frame.
Around South Bersted, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows, and any older timber or sash windows need a sealant that suits them.
All our work is covered by a 12-month guarantee, wherever you are in West Sussex.
- Place
- South Bersted (PO21, PO22, BN14)
- Region
- West Sussex
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the cost of window mastic
The price is agreed before any work begins. It takes into account:
- How easy the joints are to reach
- Whether there’s mould to deal with
- How many areas need sealing
- The type of sealant required
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. We take all of that into account in your quote.
What to tell us for a quote
When you call or email, these details help:
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
- The type of property
- Where the property is
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
What else we do in South Bersted
What happens on the day
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it generally takes a few hours for a handful of frames, longer for a whole house. Parking around South Bersted is usually easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- Frame and wall are cleaned and must be dry before sealing.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
How to prepare
- Let us know about earlier repairs to the joints
- Clear items away from the joints we are working on
- Keep children and pets away from the work area
Getting a quote
If you are in South Bersted 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 we start.
Read more
What we are called out for in South Bersted
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
Signs it’s time to call us include:
- Old mastic that has gone black or come away
- White mastic on grey or black frames
- Gaps left after new windows were fitted
- Leaking joints at the ends of sills
Rented homes near Bognor Regis station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
What your quote should include
- What insurance they hold
- Whether VAT is included
- How long the guarantee is
- Is the old sealant removed completely?
What sealant work cannot fix
Before booking, it’s worth knowing the limits too:
- Penetrating damp from a failed cavity tray or render
- 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 send us an email and we’ll say what we think before you book.
What we seal
- Window sills
- uPVC windows
- Composite doors
- Timber windows & doors
- Aluminium frames
- Patio & French doors
Different surfaces, different methods
Window sills
Stone and concrete sills have their own joints, and the joint under the frame can let rain run behind. Those are sealed with a product suited to stone or concrete.
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A neat, narrow bead in a colour to match suits the frame.
Windows and doors in South Bersted
South Bersted is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of St Mary Magdalene, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like South Bersted CofE Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
South Bersted is about 1 mile north-east of Bognor Regis, in West Sussex. Wherever you are in the PO21 postcode area, we can carry out window mastic at your property. South Bersted is one of 371 places in West Sussex where we work for window mastic. You can also see our page for Portsmouth, roughly 18 miles from South Bersted.
Work in PO21, PO22 and BN14 is quoted and booked the same way as anywhere else. We cover properties on Ivy Lane, Hook Lane and Essex Road. Neighbouring places we cover for window mastic include Bognor Regis (1 mile south-west), Felpham (1 mile east), Shripney (1 mile north), Aldwick (2 miles south-west) and Flansham (2 miles north-east). Within a short drive, we also cover Worthing (12 miles east), Chichester (6 miles north-west), Selsey (6 miles south-west), Littlehampton (6 miles east), Emsworth (12 miles west) and Rustington (7 miles east).
Local landmarks in South Bersted
We work in homes and buildings around The Brooks Local Nature Reserve, The Regis School and The William Hardwicke pub, among other places. South Bersted has its own railway station: Bognor Regis station. Other landmarks nearby include Bognor Regis War Memorial Hospital (less than half a mile south) and Bognor Regis Museum (0.8 miles south).
FAQs for South Bersted
I let a flat near Bognor Regis station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Does living near the coast affect window mastic in South Bersted?
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. It’s worth checking the walls that face the sea first.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will tell you what we are using.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames normally suit brown.
Will new mastic stop draughts?
It will if the frame joint is the problem. We check where the draught is before any work starts.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Letting agents and landlords in South Bersted can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.