West Sussex · England
Window Mastic in Boxgrove
Window mastic across Boxgrove and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Damp patches on the reveal after heavy rain
- Black, perished sealant on frames
- Draughts coming in around windows and doors
For landlords and businesses
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
We also work for property managers and facilities teams in Boxgrove and across West Sussex. We can quote a run of properties together.
About our window mastic in Boxgrove
From a single sill to a whole house of windows, the work is priced before anything is done. To get one, call 0345 464 0079 or email us with the number of frames and any access details for window mastic in Boxgrove. If you have a bead that doesn’t match the frame and draughts coming in around windows and doors, we can help, on uPVC windows, timber windows & doors and window sills alike.
Somewhere as small as Boxgrove, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Boxgrove (PO18)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Don’t use solvent cleaners on the joint
- Keep timber frames painted
- Wipe condensation off the frames
- Clear any debris from frame drain holes
A yearly look round the frames is enough. Cracks and lifting edges are easy to spot early.
Water gets in quietly when mastic fails. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Frames and glazing around Boxgrove
Historic houses like Goodwood House (about 1.5 miles north-west) are a reminder that the area around Boxgrove has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Boxgrove CofE Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. Letting a property close to Chichester station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Boxgrove is about 3 miles north-east of Chichester, in West Sussex. Whether you are in the middle of Boxgrove or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 371 places across West Sussex, from the larger towns to small villages. We also work in Portsmouth, around 16 miles away.
Postcode districts we cover here for window mastic: PO18. Local streets include The Street, Priory Close and Kirkby Close, all of which we cover. We also cover Halnaker (1 mile north), Tangmere (1 mile south), Strettington (1 mile west), Waterbeach (1 mile north-west) and Westerton (1 mile west). Larger places within reach include Worthing (14 miles east), Bognor Regis (5 miles south), Chichester (3 miles south-west), Selsey (9 miles south), Littlehampton (9 miles east) and Emsworth (10 miles west).
Around Boxgrove
Locally, jobs take us to homes and businesses close to Ormiston Six Villages Academy and The Winterton Arms Public House, among other places. For rail, the closest station is Chichester station, roughly 3.5 miles south-west. Nearby you’ll also find Chichester Centre (2.7 miles west) and Tote Copse Castle (1.9 miles south-east). For a walk, there’s Levin Down.
What happens on the day
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. It usually takes most of a day for a typical house, less for a few frames. Somewhere as small as Boxgrove, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Try not to wet indoor joints just before the visit
- Keep children and pets away from the work area
Ask for a quote
For window mastic in Boxgrove, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Read more
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
What affects the cost of window mastic
We do not publish a price list, because jobs vary so much. The quote depends on:
- Any working-time requirements on site
- Whether the work is at height
- The product the joint needs
- Whether there’s mould to deal with
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
You don’t need to know the technical terms. Just tell us:
- What’s wrong with the joints now
- The type of property
- Any previous sealing or DIY work
- Where the property is
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Nearby places to Boxgrove
Also in Boxgrove
Your questions about window mastic in Boxgrove
I let a flat near Chichester station. Can you help?
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’ll give you a clear price.
Can you do window mastic in Boxgrove?
Yes, Boxgrove is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Will resealing my frames help with draughts?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
Can you get sealant to suit coloured frames?
Yes, in most cases. Tell us the frame colour when you get in touch and we’ll use the nearest match.
Will there be a smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Where are you based?
We are based in Crawley, and we cover South East England, London and all of Scotland.
Do you work on first-floor windows?
Yes, where they can be reached safely. Let us know about access when you ask for a quote and we will plan for it.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned.
Why deal with it now?
A cracked joint around a frame lets rain into the wall. Over time that can mean damp patches, damaged plaster and rotting timber. A reseal is a much smaller job. Around Boxgrove, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why book with us
- Domestic, commercial and hotel work
- Tidy, careful work
- Arbo and Everbuild products
- Full insurance on every job
Take a look at what affects the cost or our reviews.
When to call us in Boxgrove
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. Failed sealant there lets rain into the wall or behind the frame.
Any of these means the joints need attention:
- Hard, cracked sealant around windows
- Whistling draughts around closed windows
- Damp patches on the reveal after heavy rain
- Sealant in the wrong colour for the frame
For an older house near a landmark such as The Priory Church of St Mary and St Blaize, the joint between an old wall and a newer frame is normally the first place rain gets in.
Before you book anyone
- How long the guarantee is
- Are they insured?
- Which sealant they’ll use, and why
- Who turns up on the day