West Sussex · England
Sand Mastic in Fontwell
Sand mastic for Fontwell, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Failed mastic on an exposed elevation
- Mastic round period door frames that has failed
- Cement or filler used on old window joints that has cracked
Sand mastic in Fontwell
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It suits period and listed homes, where modern sealant can look out of place. If you are dealing with old sand mastic that has cracked, crumbled or fallen out and failed mastic on an exposed elevation, we can put it right, on tenement windows, brick reveals and stone surrounds alike.
Somewhere as small as Fontwell, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
You get a one-year guarantee, the same in Fontwell as everywhere else we work.
- Location
- Fontwell (BN18, PO20)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Keep modern sealant off the mastic
- Leave the new mastic unpainted
- Renew mastic before redecorating the windows
- Ask the planning authority about consent for listed or conservation-area homes
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.
How the visit works
You don’t need to clear the whole room or building before we come, just the space around the work. We protect the rest, and the work takes a few hours per window, depending on the condition of the joints for a typical job. Somewhere like Fontwell needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Clear the area around the work
- Let us know if you’ve seen damp or leaks
- Mention if the joints have been sealed before
Getting a quote
For a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
Related advice
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Signs you need sand mastic in Fontwell
Rain on the window surround works into any crack and loosens it further. Exposed elevations usually fail first.
People normally contact us when they notice something like this:
- Draughts and rain around sash boxes
- Crumbling sand mastic round a window
- A silicone bead on a sash window that spoils the look
- Old cement repairs round a window that have failed
If you look after a building such as Ormiston Six Villages Academy, the mastic around its windows and doors needs looking after like any other building’s.
Questions to ask before booking
- Are they insured?
- How the surfaces are prepared before sealing
- What product goes in the joint
- What guarantee comes with the work
Fontwell homes and the weather
With historic houses such as Goodwood House (about 4.2 miles west) nearby, there’s older building stock in the area around Fontwell as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
Goodwood House, about 4.2 miles west, is one of the historic houses in the wider area around Fontwell. For landlords with property near Barnham station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Fontwell is about 5 miles north of Bognor Regis, in West Sussex. Whether you’re in the middle of Fontwell or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across West Sussex, we cover 371 places, and Fontwell is one of them. Portsmouth is on our list too, about 19 miles from Fontwell.
Postcode districts we cover here for sand mastic: BN18 and PO20. If you need sand mastic at a property on London Road, Cooke Road and Steeplechase Way or a nearby road, we can help. Neighbouring places we cover for sand mastic include Eastergate (1 mile south), Slindon (1 mile north-east), Nyton (1 mile south-west), West Barnham (1 mile south) and Slindon Common (1 mile east). Larger places within reach include Worthing (11 miles east), Bognor Regis (5 miles south), Chichester (6 miles west), Selsey (10 miles south-west), Littlehampton (6 miles south-east) and Lancing (14 miles east).
Landmarks near Fontwell
Locally, jobs take us to homes and businesses close to Eastergate CofE Primary School. For rail, the closest station is Barnham station, roughly 1.6 miles south. Nearby you’ll also find Tote Copse Castle (2.2 miles south-west) and Arundel and District Hospital (3.7 miles east). Open spaces near Fontwell include Bignor Hill and WWT Arundel.
What the job involves on each surface
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
Stone surrounds
We take care not to mark the stone when the old mastic comes out.
Common questions in Fontwell
Is Fontwell in your area for sand mastic?
Yes. We work across London and the South East, and Fontwell is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Do you work for landlords with property near Barnham station?
Yes. We work for landlords and agents as well as householders. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
When will the new mastic be hard?
Not right away. It skins first and hardens fully later, and we’ll tell you what to expect.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Do you take out the old sealant first?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Should I check with the council before work on a listed or conservation-area home?
It’s best to ask your local planning authority first. Like-for-like sand mastic is often the preferred finish, but they decide.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you don’t need to watch us work.
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Decayed frames that need repair
- Broken panes
- Sashes that rattle, stick or won’t open
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Joints and surfaces we work on
- Tenement windows
- Stone surrounds
- Sash and case windows
- Brick reveals
- Timber door frames
- Period & listed homes
Nearby places to Fontwell
Also in Fontwell
Why it’s worth doing now in Fontwell
Not every filler suits an old window surround. Sand mastic matches what was there and that can be important for listed homes. Around Fontwell, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
What you get with us
- We’re fully insured
- A 12-month guarantee on all work
- 180+ five-star Google reviews
- Domestic, commercial and hotel work